diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index 53f0e79ae2be..ffbc03e3bcae 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -16342,6 +16342,7 @@ components:
         - udp
         - icmp
         - websocket
+        - mcp
       example: http
       type: string
       x-enum-varnames:
@@ -16353,6 +16354,7 @@ components:
         - UDP
         - ICMP
         - WEBSOCKET
+        - MCP
     SyntheticsAPITestType:
       default: "api"
       description: Type of the Synthetic test, `api`.
@@ -16475,6 +16477,8 @@ components:
         - $ref: "#/components/schemas/SyntheticsAssertionJSONSchemaTarget"
         - $ref: "#/components/schemas/SyntheticsAssertionXPathTarget"
         - $ref: "#/components/schemas/SyntheticsAssertionJavascript"
+        - $ref: "#/components/schemas/SyntheticsAssertionMCPServerCapabilitiesTarget"
+        - $ref: "#/components/schemas/SyntheticsAssertionMCPRespectsSpecification"
     SyntheticsAssertionBodyHashOperator:
       description: Assertion operator to apply.
       enum:
@@ -16610,6 +16614,49 @@ components:
       type: string
       x-enum-varnames:
         - JAVASCRIPT
+    SyntheticsAssertionMCPRespectsSpecification:
+      description: An assertion that verifies the MCP server response respects the MCP specification.
+      properties:
+        type:
+          $ref: "#/components/schemas/SyntheticsAssertionMCPRespectsSpecificationType"
+      required:
+        - type
+      type: object
+    SyntheticsAssertionMCPRespectsSpecificationType:
+      description: Type of the assertion.
+      enum:
+        - mcpRespectsSpecification
+      example: mcpRespectsSpecification
+      type: string
+      x-enum-varnames:
+        - MCP_RESPECTS_SPECIFICATION
+    SyntheticsAssertionMCPServerCapabilitiesTarget:
+      description: An assertion that checks that an MCP server advertises the expected capabilities.
+      properties:
+        operator:
+          $ref: "#/components/schemas/SyntheticsAssertionOperator"
+        target:
+          description: List of MCP server capabilities to assert against.
+          example:
+            - completions
+          items:
+            $ref: "#/components/schemas/SyntheticsMCPServerCapability"
+          type: array
+        type:
+          $ref: "#/components/schemas/SyntheticsAssertionMCPServerCapabilitiesType"
+      required:
+        - type
+        - operator
+        - target
+      type: object
+    SyntheticsAssertionMCPServerCapabilitiesType:
+      description: Type of the assertion.
+      enum:
+        - mcpServerCapabilities
+      example: mcpServerCapabilities
+      type: string
+      x-enum-varnames:
+        - MCP_SERVER_CAPABILITIES
     SyntheticsAssertionOperator:
       description: Assertion operator to apply.
       enum:
@@ -16712,6 +16759,8 @@ components:
         - connection
         - multiNetworkHop
         - jitter
+        - mcpToolNameLength
+        - mcpToolCount
       example: statusCode
       type: string
       x-enum-varnames:
@@ -16736,6 +16785,8 @@ components:
         - CONNECTION
         - MULTI_NETWORK_HOP
         - JITTER
+        - MCP_TOOL_NAME_LENGTH
+        - MCP_TOOL_COUNT
     SyntheticsAssertionXPathOperator:
       description: Assertion operator to apply.
       enum:
@@ -18044,6 +18095,31 @@ components:
             $ref: "#/components/schemas/SyntheticsLocation"
           type: array
       type: object
+    SyntheticsMCPProtocolVersion:
+      description: The MCP protocol version used by the step. See https://modelcontextprotocol.io/specification.
+      enum:
+        - "2025-06-18"
+      example: "2025-06-18"
+      type: string
+      x-enum-varnames:
+        - VERSION_2025_06_18
+    SyntheticsMCPServerCapability:
+      description: A capability advertised by an MCP server.
+      enum:
+        - completions
+        - experimental
+        - logging
+        - prompts
+        - resources
+        - tools
+      type: string
+      x-enum-varnames:
+        - COMPLETIONS
+        - EXPERIMENTAL
+        - LOGGING
+        - PROMPTS
+        - RESOURCES
+        - TOOLS
     SyntheticsMobileStep:
       description: The steps used in a Synthetic mobile test.
       properties:
@@ -18933,15 +19009,24 @@ components:
         - UPLOAD_FILES
         - WAIT
     SyntheticsTestCallType:
-      description: The type of gRPC call to perform.
+      description: |-
+        The type of call to perform. Used by gRPC steps (`healthcheck`, `unary`)
+        and MCP steps (`init`, `tool_list`, `tool_call`). Valid values depend on
+        the parent step's `subtype`.
       enum:
         - healthcheck
         - unary
+        - init
+        - tool_list
+        - tool_call
       example: unary
       type: string
       x-enum-varnames:
         - HEALTHCHECK
         - UNARY
+        - INIT
+        - TOOL_LIST
+        - TOOL_CALL
     SyntheticsTestCiOptions:
       description: CI/CD options for a Synthetic test.
       properties:
@@ -19442,6 +19527,8 @@ components:
         isMessageBase64Encoded:
           description: Whether the message is base64 encoded.
           type: boolean
+        mcpProtocolVersion:
+          $ref: "#/components/schemas/SyntheticsMCPProtocolVersion"
         message:
           description: Message to send for UDP or WebSocket tests.
           type: string
@@ -19486,6 +19573,14 @@ components:
           description: Timeout in seconds for the test.
           format: double
           type: number
+        toolArgs:
+          additionalProperties: {}
+          description: Arguments to pass to the MCP tool. Free-form object whose shape depends on the tool. Used when `callType` is `tool_call`.
+          type: object
+        toolName:
+          description: The name of the MCP tool to call. Required when `callType` is `tool_call`.
+          example: search
+          type: string
         url:
           description: URL to perform the test with.
           example: "https://example.com"
diff --git a/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.frozen b/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.frozen
new file mode 100644
index 000000000000..214d2620f7d4
--- /dev/null
+++ b/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.frozen
@@ -0,0 +1 @@
+2026-05-19T16:45:21.251Z
\ No newline at end of file
diff --git a/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.yml b/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.yml
new file mode 100644
index 000000000000..30e359818240
--- /dev/null
+++ b/cassettes/features/v1/synthetics/Create-an-API-test-with-MCP-steps-returns-OK-Returns-the-created-test-details-response.yml
@@ -0,0 +1,58 @@
+http_interactions:
+- recorded_at: Tue, 19 May 2026 16:45:21 GMT
+  request:
+    body:
+      encoding: UTF-8
+      string: '{"config":{"steps":[{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"type":"mcpRespectsSpecification"},{"operator":"contains","target":["tools"],"type":"mcpServerCapabilities"}],"isCritical":true,"name":"Initialize
+        MCP session","request":{"callType":"init","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp"},{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"operator":"moreThan","target":0,"type":"mcpToolCount"},{"operator":"lessThan","target":64,"type":"mcpToolNameLength"},{"type":"mcpRespectsSpecification"}],"isCritical":true,"name":"List
+        MCP tools","request":{"callType":"tool_list","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp"},{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"operator":"lessThan","target":5000,"type":"responseTime"},{"type":"mcpRespectsSpecification"}],"isCritical":true,"name":"Call
+        MCP search tool","request":{"callType":"tool_call","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","toolArgs":{"limit":5,"query":"datadog
+        synthetics"},"toolName":"search","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp"}]},"locations":["aws:us-east-2"],"message":"BDD
+        test payload: synthetics_api_test_mcp_payload.json","name":"Test-Create_an_API_test_with_MCP_steps_returns_OK_Returns_the_created_test_details_response-1779209121","options":{"min_failure_duration":10,"min_location_failed":1,"monitor_name":"Test-Create_an_API_test_with_MCP_steps_returns_OK_Returns_the_created_test_details_response-1779209121","monitor_priority":5,"retry":{"count":3,"interval":1000},"tick_every":900},"subtype":"multi","tags":["testing:api"],"type":"api"}'
+    headers:
+      Accept:
+      - application/json
+      Content-Type:
+      - application/json
+    method: POST
+    uri: https://api.datadoghq.com/api/v1/synthetics/tests/api
+  response:
+    body:
+      encoding: UTF-8
+      string: '{"public_id":"htz-sbz-vuw","name":"Test-Create_an_API_test_with_MCP_steps_returns_OK_Returns_the_created_test_details_response-1779209121","status":"live","type":"api","subtype":"multi","tags":["testing:api"],"created_at":"2026-05-19T16:45:22.077574+00:00","modified_at":"2026-05-19T16:45:22.077574+00:00","config":{"steps":[{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"type":"mcpRespectsSpecification"},{"operator":"contains","target":["tools"],"type":"mcpServerCapabilities"}],"isCritical":true,"name":"Initialize
+        MCP session","request":{"callType":"init","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp","id":"3qn-99h-nhn"},{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"operator":"moreThan","target":0,"type":"mcpToolCount"},{"operator":"lessThan","target":64,"type":"mcpToolNameLength"},{"type":"mcpRespectsSpecification"}],"isCritical":true,"name":"List
+        MCP tools","request":{"callType":"tool_list","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp","id":"4xh-7i6-xda"},{"allowFailure":false,"assertions":[{"operator":"is","target":200,"type":"statusCode"},{"operator":"lessThan","target":5000,"type":"responseTime"},{"type":"mcpRespectsSpecification"}],"isCritical":true,"name":"Call
+        MCP search tool","request":{"callType":"tool_call","headers":{"DD-API-KEY":"<YOUR-API-KEY>","DD-APPLICATION-KEY":"<YOUR-APP-KEY>"},"mcpProtocolVersion":"2025-06-18","toolArgs":{"limit":5,"query":"datadog
+        synthetics"},"toolName":"search","url":"https://example.org/mcp"},"retry":{"count":0,"interval":300},"subtype":"mcp","id":"38v-zrk-3th"}]},"message":"BDD
+        test payload: synthetics_api_test_mcp_payload.json","options":{"min_failure_duration":10,"min_location_failed":1,"monitor_name":"Test-Create_an_API_test_with_MCP_steps_returns_OK_Returns_the_created_test_details_response-1779209121","monitor_priority":5,"retry":{"count":3,"interval":1000},"tick_every":900,"bits_ai_auto_investigate":false},"locations":["aws:us-east-2"],"created_by":{"name":"frog","handle":"frog@datadoghq.com","email":"frog@datadoghq.com"},"deleted_at":null,"monitor_id":284930680,"org_id":321813,"modified_by":{"name":"frog","handle":"frog@datadoghq.com","email":"frog@datadoghq.com"}}'
+    headers:
+      Content-Type:
+      - application/json
+    status:
+      code: 200
+      message: OK
+- recorded_at: Tue, 19 May 2026 16:45:21 GMT
+  request:
+    body:
+      encoding: UTF-8
+      string: '{"public_ids":["htz-sbz-vuw"]}'
+    headers:
+      Accept:
+      - application/json
+      Content-Type:
+      - application/json
+    method: POST
+    uri: https://api.datadoghq.com/api/v1/synthetics/tests/delete
+  response:
+    body:
+      encoding: UTF-8
+      string: '{"deleted_tests":[{"public_id":"htz-sbz-vuw","deleted_at":"2026-05-19T16:45:22.518455+00:00"}]}
+
+        '
+    headers:
+      Content-Type:
+      - application/json
+    status:
+      code: 200
+      message: OK
+recorded_with: VCR 6.0.0
diff --git a/examples/v1/synthetics/CreateSyntheticsAPITest_2547523542.rb b/examples/v1/synthetics/CreateSyntheticsAPITest_2547523542.rb
new file mode 100644
index 000000000000..acf605aa041e
--- /dev/null
+++ b/examples/v1/synthetics/CreateSyntheticsAPITest_2547523542.rb
@@ -0,0 +1,143 @@
+# Create an API test with MCP steps returns "OK - Returns the created test details." response
+
+require "datadog_api_client"
+api_instance = DatadogAPIClient::V1::SyntheticsAPI.new
+
+body = DatadogAPIClient::V1::SyntheticsAPITest.new({
+  config: DatadogAPIClient::V1::SyntheticsAPITestConfig.new({
+    steps: [
+      DatadogAPIClient::V1::SyntheticsAPITestStep.new({
+        name: "Initialize MCP session",
+        subtype: DatadogAPIClient::V1::SyntheticsAPITestStepSubtype::MCP,
+        allow_failure: false,
+        is_critical: true,
+        _retry: DatadogAPIClient::V1::SyntheticsTestOptionsRetry.new({
+          count: 0,
+          interval: 300,
+        }),
+        assertions: [
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::IS,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::STATUS_CODE,
+            target: 200,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecification.new({
+            type: DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecificationType::MCP_RESPECTS_SPECIFICATION,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionMCPServerCapabilitiesTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::CONTAINS,
+            type: DatadogAPIClient::V1::SyntheticsAssertionMCPServerCapabilitiesType::MCP_SERVER_CAPABILITIES,
+            target: [
+              DatadogAPIClient::V1::SyntheticsMCPServerCapability::TOOLS,
+            ],
+          }),
+        ],
+        request: DatadogAPIClient::V1::SyntheticsTestRequest.new({
+          url: "https://example.org/mcp",
+          call_type: DatadogAPIClient::V1::SyntheticsTestCallType::INIT,
+          mcp_protocol_version: DatadogAPIClient::V1::SyntheticsMCPProtocolVersion::VERSION_2025_06_18,
+          headers: {
+            "DD-API-KEY" => "<YOUR-API-KEY>", "DD-APPLICATION-KEY" => "<YOUR-APP-KEY>",
+          },
+        }),
+      }),
+      DatadogAPIClient::V1::SyntheticsAPITestStep.new({
+        name: "List MCP tools",
+        subtype: DatadogAPIClient::V1::SyntheticsAPITestStepSubtype::MCP,
+        allow_failure: false,
+        is_critical: true,
+        _retry: DatadogAPIClient::V1::SyntheticsTestOptionsRetry.new({
+          count: 0,
+          interval: 300,
+        }),
+        assertions: [
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::IS,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::STATUS_CODE,
+            target: 200,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::MORE_THAN,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::MCP_TOOL_COUNT,
+            target: 0,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::LESS_THAN,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::MCP_TOOL_NAME_LENGTH,
+            target: 64,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecification.new({
+            type: DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecificationType::MCP_RESPECTS_SPECIFICATION,
+          }),
+        ],
+        request: DatadogAPIClient::V1::SyntheticsTestRequest.new({
+          url: "https://example.org/mcp",
+          call_type: DatadogAPIClient::V1::SyntheticsTestCallType::TOOL_LIST,
+          mcp_protocol_version: DatadogAPIClient::V1::SyntheticsMCPProtocolVersion::VERSION_2025_06_18,
+          headers: {
+            "DD-API-KEY" => "<YOUR-API-KEY>", "DD-APPLICATION-KEY" => "<YOUR-APP-KEY>",
+          },
+        }),
+      }),
+      DatadogAPIClient::V1::SyntheticsAPITestStep.new({
+        name: "Call MCP search tool",
+        subtype: DatadogAPIClient::V1::SyntheticsAPITestStepSubtype::MCP,
+        allow_failure: false,
+        is_critical: true,
+        _retry: DatadogAPIClient::V1::SyntheticsTestOptionsRetry.new({
+          count: 0,
+          interval: 300,
+        }),
+        assertions: [
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::IS,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::STATUS_CODE,
+            target: 200,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionTarget.new({
+            operator: DatadogAPIClient::V1::SyntheticsAssertionOperator::LESS_THAN,
+            type: DatadogAPIClient::V1::SyntheticsAssertionType::RESPONSE_TIME,
+            target: 5000,
+          }),
+          DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecification.new({
+            type: DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecificationType::MCP_RESPECTS_SPECIFICATION,
+          }),
+        ],
+        request: DatadogAPIClient::V1::SyntheticsTestRequest.new({
+          url: "https://example.org/mcp",
+          call_type: DatadogAPIClient::V1::SyntheticsTestCallType::TOOL_CALL,
+          mcp_protocol_version: DatadogAPIClient::V1::SyntheticsMCPProtocolVersion::VERSION_2025_06_18,
+          tool_name: "search",
+          tool_args: {
+            "limit": "5", "query": "datadog synthetics",
+          },
+          headers: {
+            "DD-API-KEY" => "<YOUR-API-KEY>", "DD-APPLICATION-KEY" => "<YOUR-APP-KEY>",
+          },
+        }),
+      }),
+    ],
+  }),
+  locations: [
+    "aws:us-east-2",
+  ],
+  message: "BDD test payload: synthetics_api_test_mcp_payload.json",
+  name: "Example-Synthetic",
+  options: DatadogAPIClient::V1::SyntheticsTestOptions.new({
+    min_failure_duration: 10,
+    min_location_failed: 1,
+    monitor_name: "Example-Synthetic",
+    monitor_priority: 5,
+    _retry: DatadogAPIClient::V1::SyntheticsTestOptionsRetry.new({
+      count: 3,
+      interval: 1000,
+    }),
+    tick_every: 900,
+  }),
+  subtype: DatadogAPIClient::V1::SyntheticsTestDetailsSubType::MULTI,
+  tags: [
+    "testing:api",
+  ],
+  type: DatadogAPIClient::V1::SyntheticsAPITestType::API,
+})
+p api_instance.create_synthetics_api_test(body)
diff --git a/examples/v1/synthetics/UpdateBrowserTest.rb b/examples/v1/synthetics/UpdateBrowserTest.rb
index 69bd729727a9..8f56ef866c9d 100644
--- a/examples/v1/synthetics/UpdateBrowserTest.rb
+++ b/examples/v1/synthetics/UpdateBrowserTest.rb
@@ -30,10 +30,12 @@
         DatadogAPIClient::V1::SyntheticsTestRequestBodyFile.new({}),
       ],
       http_version: DatadogAPIClient::V1::SyntheticsTestOptionsHTTPVersion::HTTP1,
+      mcp_protocol_version: DatadogAPIClient::V1::SyntheticsMCPProtocolVersion::VERSION_2025_06_18,
       proxy: DatadogAPIClient::V1::SyntheticsTestRequestProxy.new({
         url: "https://example.com",
       }),
       service: "Greeter",
+      tool_name: "search",
       url: "https://example.com",
     }),
     variables: [
diff --git a/features/v1/synthetics.feature b/features/v1/synthetics.feature
index 38aef49ed16f..052377a39d8b 100644
--- a/features/v1/synthetics.feature
+++ b/features/v1/synthetics.feature
@@ -54,7 +54,7 @@ Feature: Synthetics
   @generated @skip @team:DataDog/synthetics-orchestrating-managing
   Scenario: Create a browser test returns "- JSON format is wrong" response
     Given new "CreateSyntheticsBrowserTest" request
-    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "proxy": {"url": "https://example.com"}, "service": "Greeter", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
+    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "mcpProtocolVersion": "2025-06-18", "proxy": {"url": "https://example.com"}, "service": "Greeter", "toolName": "search", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
     When the request is sent
     Then the response status is 400 - JSON format is wrong
 
@@ -84,7 +84,7 @@ Feature: Synthetics
   @generated @skip @team:DataDog/synthetics-orchestrating-managing
   Scenario: Create a browser test returns "Test quota is reached" response
     Given new "CreateSyntheticsBrowserTest" request
-    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "proxy": {"url": "https://example.com"}, "service": "Greeter", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
+    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "mcpProtocolVersion": "2025-06-18", "proxy": {"url": "https://example.com"}, "service": "Greeter", "toolName": "search", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
     When the request is sent
     Then the response status is 402 Test quota is reached
 
@@ -268,6 +268,22 @@ Feature: Synthetics
     When the request is sent
     Then the response status is 402 Test quota is reached
 
+  @team:DataDog/synthetics-orchestrating-managing
+  Scenario: Create an API test with MCP steps returns "OK - Returns the created test details." response
+    Given new "CreateSyntheticsAPITest" request
+    And body from file "synthetics_api_test_mcp_payload.json"
+    When the request is sent
+    Then the response status is 200 OK - Returns the created test details.
+    And the response "name" is equal to "{{ unique }}"
+    And the response "config.steps[0].subtype" is equal to "mcp"
+    And the response "config.steps[0].request.callType" is equal to "init"
+    And the response "config.steps[0].request.mcpProtocolVersion" is equal to "2025-06-18"
+    And the response "config.steps[1].subtype" is equal to "mcp"
+    And the response "config.steps[1].request.callType" is equal to "tool_list"
+    And the response "config.steps[2].subtype" is equal to "mcp"
+    And the response "config.steps[2].request.callType" is equal to "tool_call"
+    And the response "config.steps[2].request.toolName" is equal to "search"
+
   @team:DataDog/synthetics-orchestrating-managing
   Scenario: Create an API test with UDP subtype returns "OK - Returns the created test details." response
     Given new "CreateSyntheticsAPITest" request
@@ -410,7 +426,7 @@ Feature: Synthetics
   Scenario: Edit a browser test returns "- JSON format is wrong" response
     Given new "UpdateBrowserTest" request
     And request contains "public_id" parameter from "REPLACE.ME"
-    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "proxy": {"url": "https://example.com"}, "service": "Greeter", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
+    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "mcpProtocolVersion": "2025-06-18", "proxy": {"url": "https://example.com"}, "service": "Greeter", "toolName": "search", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
     When the request is sent
     Then the response status is 400 - JSON format is wrong
 
@@ -418,7 +434,7 @@ Feature: Synthetics
   Scenario: Edit a browser test returns "- Synthetic Monitoring is not activated for the user" response
     Given new "UpdateBrowserTest" request
     And request contains "public_id" parameter from "REPLACE.ME"
-    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "proxy": {"url": "https://example.com"}, "service": "Greeter", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
+    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "mcpProtocolVersion": "2025-06-18", "proxy": {"url": "https://example.com"}, "service": "Greeter", "toolName": "search", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
     When the request is sent
     Then the response status is 404 - Synthetic Monitoring is not activated for the user
 
@@ -426,7 +442,7 @@ Feature: Synthetics
   Scenario: Edit a browser test returns "OK" response
     Given new "UpdateBrowserTest" request
     And request contains "public_id" parameter from "REPLACE.ME"
-    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "proxy": {"url": "https://example.com"}, "service": "Greeter", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
+    And body with value {"config": {"assertions": [], "configVariables": [{"name": "VARIABLE_NAME", "secure": false, "type": "text"}], "request": {"basicAuth": {"password": "PaSSw0RD!", "type": "web", "username": "my_username"}, "bodyType": "text/plain", "callType": "unary", "certificate": {"cert": {}, "key": {}}, "certificateDomains": [], "files": [{}], "httpVersion": "http1", "mcpProtocolVersion": "2025-06-18", "proxy": {"url": "https://example.com"}, "service": "Greeter", "toolName": "search", "url": "https://example.com"}, "variables": [{"name": "VARIABLE_NAME", "type": "text"}]}, "locations": ["aws:eu-west-3"], "message": "", "name": "Example test name", "options": {"blockedRequestPatterns": [], "ci": {"executionRule": "blocking"}, "device_ids": ["chrome.laptop_large"], "httpVersion": "http1", "monitor_options": {"notification_preset_name": "show_all"}, "restricted_roles": ["xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"], "retry": {}, "rumSettings": {"applicationId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "clientTokenId": 12345, "isEnabled": true}, "scheduling": {"timeframes": [{"day": 1, "from": "07:00", "to": "16:00"}, {"day": 3, "from": "07:00", "to": "16:00"}], "timezone": "America/New_York"}}, "status": "live", "steps": [{"type": "assertElementContent"}], "tags": ["env:prod"], "type": "browser"}
     When the request is sent
     Then the response status is 200 OK
 
diff --git a/features/v1/synthetics_api_test_mcp_payload.json b/features/v1/synthetics_api_test_mcp_payload.json
new file mode 100644
index 000000000000..dc94a0f54892
--- /dev/null
+++ b/features/v1/synthetics_api_test_mcp_payload.json
@@ -0,0 +1,139 @@
+{
+  "config": {
+    "steps": [
+      {
+        "name": "Initialize MCP session",
+        "subtype": "mcp",
+        "allowFailure": false,
+        "isCritical": true,
+        "retry": {
+          "count": 0,
+          "interval": 300
+        },
+        "assertions": [
+          {
+            "operator": "is",
+            "type": "statusCode",
+            "target": 200
+          },
+          {
+            "type": "mcpRespectsSpecification"
+          },
+          {
+            "operator": "contains",
+            "type": "mcpServerCapabilities",
+            "target": ["tools"]
+          }
+        ],
+        "request": {
+          "url": "https://example.org/mcp",
+          "callType": "init",
+          "mcpProtocolVersion": "2025-06-18",
+          "headers": {
+            "DD-API-KEY": "<YOUR-API-KEY>",
+            "DD-APPLICATION-KEY": "<YOUR-APP-KEY>"
+          }
+        }
+      },
+      {
+        "name": "List MCP tools",
+        "subtype": "mcp",
+        "allowFailure": false,
+        "isCritical": true,
+        "retry": {
+          "count": 0,
+          "interval": 300
+        },
+        "assertions": [
+          {
+            "operator": "is",
+            "type": "statusCode",
+            "target": 200
+          },
+          {
+            "operator": "moreThan",
+            "type": "mcpToolCount",
+            "target": 0
+          },
+          {
+            "operator": "lessThan",
+            "type": "mcpToolNameLength",
+            "target": 64
+          },
+          {
+            "type": "mcpRespectsSpecification"
+          }
+        ],
+        "request": {
+          "url": "https://example.org/mcp",
+          "callType": "tool_list",
+          "mcpProtocolVersion": "2025-06-18",
+          "headers": {
+            "DD-API-KEY": "<YOUR-API-KEY>",
+            "DD-APPLICATION-KEY": "<YOUR-APP-KEY>"
+          }
+        }
+      },
+      {
+        "name": "Call MCP search tool",
+        "subtype": "mcp",
+        "allowFailure": false,
+        "isCritical": true,
+        "retry": {
+          "count": 0,
+          "interval": 300
+        },
+        "assertions": [
+          {
+            "operator": "is",
+            "type": "statusCode",
+            "target": 200
+          },
+          {
+            "operator": "lessThan",
+            "type": "responseTime",
+            "target": 5000
+          },
+          {
+            "type": "mcpRespectsSpecification"
+          }
+        ],
+        "request": {
+          "url": "https://example.org/mcp",
+          "callType": "tool_call",
+          "mcpProtocolVersion": "2025-06-18",
+          "toolName": "search",
+          "toolArgs": {
+            "limit": 5,
+            "query": "datadog synthetics"
+          },
+          "headers": {
+            "DD-API-KEY": "<YOUR-API-KEY>",
+            "DD-APPLICATION-KEY": "<YOUR-APP-KEY>"
+          }
+        }
+      }
+    ]
+  },
+  "locations": [
+    "aws:us-east-2"
+  ],
+  "message": "BDD test payload: synthetics_api_test_mcp_payload.json",
+  "name": "{{ unique }}",
+  "options": {
+    "min_failure_duration": 10,
+    "min_location_failed": 1,
+    "monitor_name": "{{ unique }}",
+    "monitor_priority": 5,
+    "retry": {
+      "count": 3,
+      "interval": 1000
+    },
+    "tick_every": 900
+  },
+  "subtype": "multi",
+  "tags": [
+    "testing:api"
+  ],
+  "type": "api"
+}
diff --git a/lib/datadog_api_client/inflector.rb b/lib/datadog_api_client/inflector.rb
index 30436fd5cac9..c68c30af571a 100644
--- a/lib/datadog_api_client/inflector.rb
+++ b/lib/datadog_api_client/inflector.rb
@@ -743,6 +743,10 @@ def overrides
           "v1.synthetics_assertion_json_schema_operator" => "SyntheticsAssertionJSONSchemaOperator",
           "v1.synthetics_assertion_json_schema_target" => "SyntheticsAssertionJSONSchemaTarget",
           "v1.synthetics_assertion_json_schema_target_target" => "SyntheticsAssertionJSONSchemaTargetTarget",
+          "v1.synthetics_assertion_mcp_respects_specification" => "SyntheticsAssertionMCPRespectsSpecification",
+          "v1.synthetics_assertion_mcp_respects_specification_type" => "SyntheticsAssertionMCPRespectsSpecificationType",
+          "v1.synthetics_assertion_mcp_server_capabilities_target" => "SyntheticsAssertionMCPServerCapabilitiesTarget",
+          "v1.synthetics_assertion_mcp_server_capabilities_type" => "SyntheticsAssertionMCPServerCapabilitiesType",
           "v1.synthetics_assertion_operator" => "SyntheticsAssertionOperator",
           "v1.synthetics_assertion_target" => "SyntheticsAssertionTarget",
           "v1.synthetics_assertion_target_value" => "SyntheticsAssertionTargetValue",
@@ -816,6 +820,8 @@ def overrides
           "v1.synthetics_local_variable_parsing_options_type" => "SyntheticsLocalVariableParsingOptionsType",
           "v1.synthetics_location" => "SyntheticsLocation",
           "v1.synthetics_locations" => "SyntheticsLocations",
+          "v1.synthetics_mcp_protocol_version" => "SyntheticsMCPProtocolVersion",
+          "v1.synthetics_mcp_server_capability" => "SyntheticsMCPServerCapability",
           "v1.synthetics_mobile_step" => "SyntheticsMobileStep",
           "v1.synthetics_mobile_step_params" => "SyntheticsMobileStepParams",
           "v1.synthetics_mobile_step_params_direction" => "SyntheticsMobileStepParamsDirection",
diff --git a/lib/datadog_api_client/v1/models/synthetics_api_test_step_subtype.rb b/lib/datadog_api_client/v1/models/synthetics_api_test_step_subtype.rb
index 5845da2a0cf3..cd9bedf65f86 100644
--- a/lib/datadog_api_client/v1/models/synthetics_api_test_step_subtype.rb
+++ b/lib/datadog_api_client/v1/models/synthetics_api_test_step_subtype.rb
@@ -29,5 +29,6 @@ class SyntheticsAPITestStepSubtype
     UDP = "udp".freeze
     ICMP = "icmp".freeze
     WEBSOCKET = "websocket".freeze
+    MCP = "mcp".freeze
   end
 end
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion.rb b/lib/datadog_api_client/v1/models/synthetics_assertion.rb
index 02ed90850bde..3d0a2f04793f 100644
--- a/lib/datadog_api_client/v1/models/synthetics_assertion.rb
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion.rb
@@ -32,7 +32,9 @@ def openapi_one_of
           :'SyntheticsAssertionJSONPathTarget',
           :'SyntheticsAssertionJSONSchemaTarget',
           :'SyntheticsAssertionXPathTarget',
-          :'SyntheticsAssertionJavascript'
+          :'SyntheticsAssertionJavascript',
+          :'SyntheticsAssertionMCPServerCapabilitiesTarget',
+          :'SyntheticsAssertionMCPRespectsSpecification'
         ]
       end
       # Builds the object
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification.rb b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification.rb
new file mode 100644
index 000000000000..3e450000a679
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification.rb
@@ -0,0 +1,123 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # An assertion that verifies the MCP server response respects the MCP specification.
+  class SyntheticsAssertionMCPRespectsSpecification
+    include BaseGenericModel
+
+    # Type of the assertion.
+    attr_reader :type
+
+    attr_accessor :additional_properties
+
+    # Attribute mapping from ruby-style variable name to JSON key.
+    # @!visibility private
+    def self.attribute_map
+      {
+        :'type' => :'type'
+      }
+    end
+
+    # Attribute type mapping.
+    # @!visibility private
+    def self.openapi_types
+      {
+        :'type' => :'SyntheticsAssertionMCPRespectsSpecificationType'
+      }
+    end
+
+    # Initializes the object
+    # @param attributes [Hash] Model attributes in the form of hash
+    # @!visibility private
+    def initialize(attributes = {})
+      if (!attributes.is_a?(Hash))
+        fail ArgumentError, "The input argument (attributes) must be a hash in `DatadogAPIClient::V1::SyntheticsAssertionMCPRespectsSpecification` initialize method"
+      end
+
+      self.additional_properties = {}
+      # check to see if the attribute exists and convert string to symbol for hash key
+      attributes = attributes.each_with_object({}) { |(k, v), h|
+        if (!self.class.attribute_map.key?(k.to_sym))
+          self.additional_properties[k.to_sym] = v
+        else
+          h[k.to_sym] = v
+        end
+      }
+
+      if attributes.key?(:'type')
+        self.type = attributes[:'type']
+      end
+    end
+
+    # Check to see if the all the properties in the model are valid
+    # @return true if the model is valid
+    # @!visibility private
+    def valid?
+      return false if @type.nil?
+      true
+    end
+
+    # Custom attribute writer method with validation
+    # @param type [Object] Object to be assigned
+    # @!visibility private
+    def type=(type)
+      if type.nil?
+        fail ArgumentError, 'invalid value for "type", type cannot be nil.'
+      end
+      @type = type
+    end
+
+    # Returns the object in the form of hash, with additionalProperties support.
+    # @return [Hash] Returns the object in the form of hash
+    # @!visibility private
+    def to_hash
+      hash = {}
+      self.class.attribute_map.each_pair do |attr, param|
+        value = self.send(attr)
+        if value.nil?
+          is_nullable = self.class.openapi_nullable.include?(attr)
+          next if !is_nullable || (is_nullable && !instance_variable_defined?(:"@#{attr}"))
+        end
+
+        hash[param] = _to_hash(value)
+      end
+      self.additional_properties.each_pair do |attr, value|
+        hash[attr] = value
+      end
+      hash
+    end
+
+    # Checks equality by comparing each attribute.
+    # @param o [Object] Object to be compared
+    # @!visibility private
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          type == o.type &&
+          additional_properties == o.additional_properties
+    end
+
+    # Calculates hash code according to all attributes.
+    # @return [Integer] Hash code
+    # @!visibility private
+    def hash
+      [type, additional_properties].hash
+    end
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification_type.rb b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification_type.rb
new file mode 100644
index 000000000000..da981c459bf8
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_respects_specification_type.rb
@@ -0,0 +1,26 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # Type of the assertion.
+  class SyntheticsAssertionMCPRespectsSpecificationType
+    include BaseEnumModel
+
+    MCP_RESPECTS_SPECIFICATION = "mcpRespectsSpecification".freeze
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_target.rb b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_target.rb
new file mode 100644
index 000000000000..7c47baa8163b
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_target.rb
@@ -0,0 +1,167 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # An assertion that checks that an MCP server advertises the expected capabilities.
+  class SyntheticsAssertionMCPServerCapabilitiesTarget
+    include BaseGenericModel
+
+    # Assertion operator to apply.
+    attr_reader :operator
+
+    # List of MCP server capabilities to assert against.
+    attr_reader :target
+
+    # Type of the assertion.
+    attr_reader :type
+
+    attr_accessor :additional_properties
+
+    # Attribute mapping from ruby-style variable name to JSON key.
+    # @!visibility private
+    def self.attribute_map
+      {
+        :'operator' => :'operator',
+        :'target' => :'target',
+        :'type' => :'type'
+      }
+    end
+
+    # Attribute type mapping.
+    # @!visibility private
+    def self.openapi_types
+      {
+        :'operator' => :'SyntheticsAssertionOperator',
+        :'target' => :'Array<SyntheticsMCPServerCapability>',
+        :'type' => :'SyntheticsAssertionMCPServerCapabilitiesType'
+      }
+    end
+
+    # Initializes the object
+    # @param attributes [Hash] Model attributes in the form of hash
+    # @!visibility private
+    def initialize(attributes = {})
+      if (!attributes.is_a?(Hash))
+        fail ArgumentError, "The input argument (attributes) must be a hash in `DatadogAPIClient::V1::SyntheticsAssertionMCPServerCapabilitiesTarget` initialize method"
+      end
+
+      self.additional_properties = {}
+      # check to see if the attribute exists and convert string to symbol for hash key
+      attributes = attributes.each_with_object({}) { |(k, v), h|
+        if (!self.class.attribute_map.key?(k.to_sym))
+          self.additional_properties[k.to_sym] = v
+        else
+          h[k.to_sym] = v
+        end
+      }
+
+      if attributes.key?(:'operator')
+        self.operator = attributes[:'operator']
+      end
+
+      if attributes.key?(:'target')
+        if (value = attributes[:'target']).is_a?(Array)
+          self.target = value
+        end
+      end
+
+      if attributes.key?(:'type')
+        self.type = attributes[:'type']
+      end
+    end
+
+    # Check to see if the all the properties in the model are valid
+    # @return true if the model is valid
+    # @!visibility private
+    def valid?
+      return false if @operator.nil?
+      return false if @target.nil?
+      return false if @type.nil?
+      true
+    end
+
+    # Custom attribute writer method with validation
+    # @param operator [Object] Object to be assigned
+    # @!visibility private
+    def operator=(operator)
+      if operator.nil?
+        fail ArgumentError, 'invalid value for "operator", operator cannot be nil.'
+      end
+      @operator = operator
+    end
+
+    # Custom attribute writer method with validation
+    # @param target [Object] Object to be assigned
+    # @!visibility private
+    def target=(target)
+      if target.nil?
+        fail ArgumentError, 'invalid value for "target", target cannot be nil.'
+      end
+      @target = target
+    end
+
+    # Custom attribute writer method with validation
+    # @param type [Object] Object to be assigned
+    # @!visibility private
+    def type=(type)
+      if type.nil?
+        fail ArgumentError, 'invalid value for "type", type cannot be nil.'
+      end
+      @type = type
+    end
+
+    # Returns the object in the form of hash, with additionalProperties support.
+    # @return [Hash] Returns the object in the form of hash
+    # @!visibility private
+    def to_hash
+      hash = {}
+      self.class.attribute_map.each_pair do |attr, param|
+        value = self.send(attr)
+        if value.nil?
+          is_nullable = self.class.openapi_nullable.include?(attr)
+          next if !is_nullable || (is_nullable && !instance_variable_defined?(:"@#{attr}"))
+        end
+
+        hash[param] = _to_hash(value)
+      end
+      self.additional_properties.each_pair do |attr, value|
+        hash[attr] = value
+      end
+      hash
+    end
+
+    # Checks equality by comparing each attribute.
+    # @param o [Object] Object to be compared
+    # @!visibility private
+    def ==(o)
+      return true if self.equal?(o)
+      self.class == o.class &&
+          operator == o.operator &&
+          target == o.target &&
+          type == o.type &&
+          additional_properties == o.additional_properties
+    end
+
+    # Calculates hash code according to all attributes.
+    # @return [Integer] Hash code
+    # @!visibility private
+    def hash
+      [operator, target, type, additional_properties].hash
+    end
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_type.rb b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_type.rb
new file mode 100644
index 000000000000..58fb89aec50d
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion_mcp_server_capabilities_type.rb
@@ -0,0 +1,26 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # Type of the assertion.
+  class SyntheticsAssertionMCPServerCapabilitiesType
+    include BaseEnumModel
+
+    MCP_SERVER_CAPABILITIES = "mcpServerCapabilities".freeze
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_assertion_type.rb b/lib/datadog_api_client/v1/models/synthetics_assertion_type.rb
index d992b32cdb22..bf3322ccdb32 100644
--- a/lib/datadog_api_client/v1/models/synthetics_assertion_type.rb
+++ b/lib/datadog_api_client/v1/models/synthetics_assertion_type.rb
@@ -42,5 +42,7 @@ class SyntheticsAssertionType
     CONNECTION = "connection".freeze
     MULTI_NETWORK_HOP = "multiNetworkHop".freeze
     JITTER = "jitter".freeze
+    MCP_TOOL_NAME_LENGTH = "mcpToolNameLength".freeze
+    MCP_TOOL_COUNT = "mcpToolCount".freeze
   end
 end
diff --git a/lib/datadog_api_client/v1/models/synthetics_mcp_protocol_version.rb b/lib/datadog_api_client/v1/models/synthetics_mcp_protocol_version.rb
new file mode 100644
index 000000000000..66ea9e1c4b48
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_mcp_protocol_version.rb
@@ -0,0 +1,26 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # The MCP protocol version used by the step. See https://modelcontextprotocol.io/specification.
+  class SyntheticsMCPProtocolVersion
+    include BaseEnumModel
+
+    VERSION_2025_06_18 = "2025-06-18".freeze
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_mcp_server_capability.rb b/lib/datadog_api_client/v1/models/synthetics_mcp_server_capability.rb
new file mode 100644
index 000000000000..13b4c523cd3d
--- /dev/null
+++ b/lib/datadog_api_client/v1/models/synthetics_mcp_server_capability.rb
@@ -0,0 +1,31 @@
+=begin
+#Datadog API V1 Collection
+
+#Collection of all Datadog Public endpoints.
+
+The version of the OpenAPI document: 1.0
+Contact: support@datadoghq.com
+Generated by: https://github.com/DataDog/datadog-api-client-ruby/tree/master/.generator
+
+ Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
+ This product includes software developed at Datadog (https://www.datadoghq.com/).
+ Copyright 2020-Present Datadog, Inc.
+
+=end
+
+require 'date'
+require 'time'
+
+module DatadogAPIClient::V1
+  # A capability advertised by an MCP server.
+  class SyntheticsMCPServerCapability
+    include BaseEnumModel
+
+    COMPLETIONS = "completions".freeze
+    EXPERIMENTAL = "experimental".freeze
+    LOGGING = "logging".freeze
+    PROMPTS = "prompts".freeze
+    RESOURCES = "resources".freeze
+    TOOLS = "tools".freeze
+  end
+end
diff --git a/lib/datadog_api_client/v1/models/synthetics_test_call_type.rb b/lib/datadog_api_client/v1/models/synthetics_test_call_type.rb
index 5f4fc0a98553..1b3418d57579 100644
--- a/lib/datadog_api_client/v1/models/synthetics_test_call_type.rb
+++ b/lib/datadog_api_client/v1/models/synthetics_test_call_type.rb
@@ -17,11 +17,16 @@
 require 'time'
 
 module DatadogAPIClient::V1
-  # The type of gRPC call to perform.
+  # The type of call to perform. Used by gRPC steps (`healthcheck`, `unary`)
+  # and MCP steps (`init`, `tool_list`, `tool_call`). Valid values depend on
+  # the parent step's `subtype`.
   class SyntheticsTestCallType
     include BaseEnumModel
 
     HEALTHCHECK = "healthcheck".freeze
     UNARY = "unary".freeze
+    INIT = "init".freeze
+    TOOL_LIST = "tool_list".freeze
+    TOOL_CALL = "tool_call".freeze
   end
 end
diff --git a/lib/datadog_api_client/v1/models/synthetics_test_request.rb b/lib/datadog_api_client/v1/models/synthetics_test_request.rb
index cade289b674d..56ab2f21ec91 100644
--- a/lib/datadog_api_client/v1/models/synthetics_test_request.rb
+++ b/lib/datadog_api_client/v1/models/synthetics_test_request.rb
@@ -33,7 +33,9 @@ class SyntheticsTestRequest
     # Type of the request body.
     attr_accessor :body_type
 
-    # The type of gRPC call to perform.
+    # The type of call to perform. Used by gRPC steps (`healthcheck`, `unary`)
+    # and MCP steps (`init`, `tool_list`, `tool_call`). Valid values depend on
+    # the parent step's `subtype`.
     attr_accessor :call_type
 
     # Client certificate to use when performing the test request.
@@ -81,6 +83,9 @@ class SyntheticsTestRequest
     # Whether the message is base64 encoded.
     attr_accessor :is_message_base64_encoded
 
+    # The MCP protocol version used by the step. See https://modelcontextprotocol.io/specification.
+    attr_accessor :mcp_protocol_version
+
     # Message to send for UDP or WebSocket tests.
     attr_accessor :message
 
@@ -122,6 +127,12 @@ class SyntheticsTestRequest
     # Timeout in seconds for the test.
     attr_accessor :timeout
 
+    # Arguments to pass to the MCP tool. Free-form object whose shape depends on the tool. Used when `callType` is `tool_call`.
+    attr_accessor :tool_args
+
+    # The name of the MCP tool to call. Required when `callType` is `tool_call`.
+    attr_accessor :tool_name
+
     # URL to perform the test with.
     attr_accessor :url
 
@@ -151,6 +162,7 @@ def self.attribute_map
         :'host' => :'host',
         :'http_version' => :'httpVersion',
         :'is_message_base64_encoded' => :'isMessageBase64Encoded',
+        :'mcp_protocol_version' => :'mcpProtocolVersion',
         :'message' => :'message',
         :'metadata' => :'metadata',
         :'method' => :'method',
@@ -164,6 +176,8 @@ def self.attribute_map
         :'service' => :'service',
         :'should_track_hops' => :'shouldTrackHops',
         :'timeout' => :'timeout',
+        :'tool_args' => :'toolArgs',
+        :'tool_name' => :'toolName',
         :'url' => :'url'
       }
     end
@@ -192,6 +206,7 @@ def self.openapi_types
         :'host' => :'String',
         :'http_version' => :'SyntheticsTestOptionsHTTPVersion',
         :'is_message_base64_encoded' => :'Boolean',
+        :'mcp_protocol_version' => :'SyntheticsMCPProtocolVersion',
         :'message' => :'String',
         :'metadata' => :'Hash<String, String>',
         :'method' => :'String',
@@ -205,6 +220,8 @@ def self.openapi_types
         :'service' => :'String',
         :'should_track_hops' => :'Boolean',
         :'timeout' => :'Float',
+        :'tool_args' => :'Hash<String, Object>',
+        :'tool_name' => :'String',
         :'url' => :'String'
       }
     end
@@ -311,6 +328,10 @@ def initialize(attributes = {})
         self.is_message_base64_encoded = attributes[:'is_message_base64_encoded']
       end
 
+      if attributes.key?(:'mcp_protocol_version')
+        self.mcp_protocol_version = attributes[:'mcp_protocol_version']
+      end
+
       if attributes.key?(:'message')
         self.message = attributes[:'message']
       end
@@ -363,6 +384,14 @@ def initialize(attributes = {})
         self.timeout = attributes[:'timeout']
       end
 
+      if attributes.key?(:'tool_args')
+        self.tool_args = attributes[:'tool_args']
+      end
+
+      if attributes.key?(:'tool_name')
+        self.tool_name = attributes[:'tool_name']
+      end
+
       if attributes.key?(:'url')
         self.url = attributes[:'url']
       end
@@ -436,6 +465,7 @@ def ==(o)
           host == o.host &&
           http_version == o.http_version &&
           is_message_base64_encoded == o.is_message_base64_encoded &&
+          mcp_protocol_version == o.mcp_protocol_version &&
           message == o.message &&
           metadata == o.metadata &&
           method == o.method &&
@@ -449,6 +479,8 @@ def ==(o)
           service == o.service &&
           should_track_hops == o.should_track_hops &&
           timeout == o.timeout &&
+          tool_args == o.tool_args &&
+          tool_name == o.tool_name &&
           url == o.url &&
           additional_properties == o.additional_properties
     end
@@ -457,7 +489,7 @@ def ==(o)
     # @return [Integer] Hash code
     # @!visibility private
     def hash
-      [allow_insecure, basic_auth, body, body_type, call_type, certificate, certificate_domains, check_certificate_revocation, compressed_json_descriptor, compressed_proto_file, disable_aia_intermediate_fetching, dns_server, dns_server_port, files, follow_redirects, form, headers, host, http_version, is_message_base64_encoded, message, metadata, method, no_saving_response_body, number_of_packets, persist_cookies, port, proxy, query, servername, service, should_track_hops, timeout, url, additional_properties].hash
+      [allow_insecure, basic_auth, body, body_type, call_type, certificate, certificate_domains, check_certificate_revocation, compressed_json_descriptor, compressed_proto_file, disable_aia_intermediate_fetching, dns_server, dns_server_port, files, follow_redirects, form, headers, host, http_version, is_message_base64_encoded, mcp_protocol_version, message, metadata, method, no_saving_response_body, number_of_packets, persist_cookies, port, proxy, query, servername, service, should_track_hops, timeout, tool_args, tool_name, url, additional_properties].hash
     end
   end
 end