fix(validators): allow GitLab repository URLs with nested subgroups

internal/validators/utils.go

@@ -10,8 +10,9 @@ var (
 	// Regular expressions for validating repository URLs
 	// These regex patterns ensure the URL is in the format of a valid GitHub or GitLab repository
 	// For example:	// - GitHub: https://github.com/user/repo
+	// GitLab additionally supports nested groups/subgroups, e.g. https://gitlab.com/group/subgroup/repo
 	githubURLRegex = regexp.MustCompile(`^https?://(www\.)?github\.com/[\w.-]+/[\w.-]+/?$`)
-	gitlabURLRegex = regexp.MustCompile(`^https?://(www\.)?gitlab\.com/[\w.-]+/[\w.-]+/?$`)
+	gitlabURLRegex = regexp.MustCompile(`^https?://(www\.)?gitlab\.com/[\w.-]+(/[\w.-]+)+/?$`)
 )
 
 // IsValidRepositoryURL checks if the given URL is valid for the specified repository source

internal/validators/utils_test.go

@@ -0,0 +1,57 @@
+package validators_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/modelcontextprotocol/registry/internal/validators"
+)
+
+func TestIsValidRepositoryURL(t *testing.T) {
+	tests := []struct {
+		name   string
+		source validators.RepositorySource
+		url    string
+		want   bool
+	}{
+		// GitHub
+		{"github valid owner/repo", validators.SourceGitHub, "https://github.com/owner/repo", true},
+		{"github valid with trailing slash", validators.SourceGitHub, "https://github.com/owner/repo/", true},
+		{"github valid with www", validators.SourceGitHub, "https://www.github.com/owner/repo", true},
+		{"github missing repo", validators.SourceGitHub, "https://github.com/owner", false},
+		{"github extra path segment stays invalid", validators.SourceGitHub, "https://github.com/owner/repo/extra", false},
+
+		// GitLab: flat owner/repo (no regression)
+		{"gitlab valid owner/repo", validators.SourceGitLab, "https://gitlab.com/owner/repo", true},
+		{"gitlab valid with trailing slash", validators.SourceGitLab, "https://gitlab.com/owner/repo/", true},
+		{"gitlab valid with www", validators.SourceGitLab, "https://www.gitlab.com/owner/repo", true},
+		{"gitlab valid with dots and dashes", validators.SourceGitLab, "https://gitlab.com/my-org.io/my_repo-v2.0", true},
+
+		// GitLab: nested groups/subgroups (issue #1359)
+		{"gitlab valid single subgroup", validators.SourceGitLab, "https://gitlab.com/group/subgroup/repo", true},
+		{"gitlab valid deeply nested subgroups", validators.SourceGitLab, "https://gitlab.com/myorg/team/subgroup/my-mcp-server", true},
+		{"gitlab valid nested with trailing slash", validators.SourceGitLab, "https://gitlab.com/group/subgroup/repo/", true},
+
+		// GitLab: malformed URLs that must stay rejected
+		{"gitlab missing owner and repo", validators.SourceGitLab, "https://gitlab.com", false},
+		{"gitlab missing repo", validators.SourceGitLab, "https://gitlab.com/owner", false},
+		{"gitlab empty path segment", validators.SourceGitLab, "https://gitlab.com/group//repo", false},
+		{"gitlab leading empty segment", validators.SourceGitLab, "https://gitlab.com//group/repo", false},
+		{"gitlab segment with space", validators.SourceGitLab, "https://gitlab.com/group/sub group/repo", false},
+		{"gitlab spoofed host suffix", validators.SourceGitLab, "https://evilgitlab.com/group/repo", false},
+		{"gitlab spoofed host prefix", validators.SourceGitLab, "https://gitlab.com.evil.com/group/repo", false},
+		{"gitlab query string", validators.SourceGitLab, "https://gitlab.com/group/subgroup/repo?ref=main", false},
+		{"gitlab fragment", validators.SourceGitLab, "https://gitlab.com/group/subgroup/repo#readme", false},
+
+		// Unknown source
+		{"unknown source", validators.RepositorySource("bitbucket"), "https://bitbucket.org/owner/repo", false},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := validators.IsValidRepositoryURL(tc.source, tc.url)
+			assert.Equal(t, tc.want, got, "url: %s", tc.url)
+		})
+	}
+}

internal/validators/validators_test.go

@@ -323,6 +323,20 @@ func TestValidate(t *testing.T) {
 			},
 			expectedError: validators.ErrInvalidRepositoryURL.Error(),
 		},
+		{
+			name: "server with valid GitLab subgroup URL",
+			serverDetail: apiv0.ServerJSON{
+				Schema:      model.CurrentSchemaURL,
+				Name:        "com.example/test-server",
+				Description: "A test server",
+				Repository: &model.Repository{
+					URL:    "https://gitlab.com/group/subgroup/repo",
+					Source: "gitlab",
+				},
+				Version: "1.0.0",
+			},
+			expectedError: "",
+		},
 		{
 			name: "server with valid repository subfolder",
 			serverDetail: apiv0.ServerJSON{