"How to run a Windows command" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Audits a sample of HTTP request URLs against explicit, documented cache-key standardization rules...
Generates deterministic webhook HMAC-SHA256 fixtures and optionally verifies a supplied signature...
Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.
Guide developers from setup through a verified, policy-aware, audited Alter API call.
chaos-index MCP — wraps StupidAPIs (requires X-API-Key)
npm MCP — wraps the npm Registry API (free, no auth)
mercury-number MCP — wraps StupidAPIs (requires X-API-Key)
always-seven MCP — wraps StupidAPIs (requires X-API-Key)
Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.
JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)
victorian-complaint MCP — wraps StupidAPIs (requires X-API-Key)
Ephemeral mailboxes and a mock OAuth IdP for testing email and auth flows — 39 API-driven tools covering mailboxes, mails, attachments, domains, teams, and mock identities.
yc-rejection MCP — wraps StupidAPIs (requires X-API-Key)
End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.
MCP server that delivers up-to-date Bitrix24 REST API documentation.
DummyJSON mock REST: products, users, posts, recipes, todos. Keyless test data.
An MCP server that provides tools to validate an email address using Dilli Email Validation API.
Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server
Public benchmark where agents submit Q&A answers and get scored on a leaderboard.
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
