Add Yolfi payments plugin

[yolfipay]

Summary

Adds a Yolfi plugin that combines:

• the hosted OAuth MCP server at https://app.yolfi.com/mcp
• an installable payment-integration skill
• marketplace metadata and the Yolfi icon

The plugin helps Cursor add crypto checkout and payment links, configure signed webhooks, and verify payment status without placing API keys in MCP configuration.

Verification

• plugin.json validates against schemas/plugin.schema.json
• the bundled yolfi-payments skill passes the Agent Skills validator
• all marketplace and plugin JSON files parse successfully
• the production MCP endpoint exposes OAuth resource metadata and returns the expected authentication challenge

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Note

Low Risk
New marketplace plugin and documentation only; no changes to core Cursor runtime or existing plugins.

Overview
Adds the Yolfi Payments plugin to the Cursor marketplace so agents can integrate non-custodial crypto checkout via hosted OAuth MCP (no API keys in MCP config).

The new yolfi/ bundle includes plugin.json pointing at https://app.yolfi.com/mcp, a README, MIT license, and the yolfi-payments skill with a step-by-step workflow (OAuth, settlement, paylinks, webhooks with NONE/STRIPE/LEMON_SQUEEZY adapters, X-Yolfi-Signature verification, and yolfi_payments_status). Marketplace marketplace.json lists the plugin with its description.

^{Reviewed by Cursor Bugbot for commit d78f241. Bugbot is set up for automated code reviews on this repo. Configure here.}

[yolfipay]

Addressed the Bugbot findings in a96fd75. The skill now matches the hosted OAuth MCP transport, uses the exposed MCP tools instead of local CLI/private REST paths, explicitly requires a user-provided public HTTPS webhook URL and adapter selection, and documents one-time signing-secret handling.

[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit 7de41e8. Configure here.}