"How to send an email through the end-user's Outlook" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
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
Discover, pay for, execute, and publish APIs through Apiosk.
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Guide developers from setup through a verified, policy-aware, audited Alter API call.
Turn any task into the right API calls: discover, evaluate, and integrate public APIs.
npm MCP — wraps the npm Registry API (free, no auth)
the-committee MCP — wraps StupidAPIs (requires X-API-Key)
Verify an agent's advertised route, price, payment details, and schemas against its live endpoint.
Regex matching, email/URL format validation, and JSON Schema validation.
Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.
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.
Check an MCP endpoint resolves: liveness, live tool list, schema drift. Free.
The official MCP Server for the Mux API
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.
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
MCP server for AI access to SmartBear tools, including BugSnag, Reflect, Swagger, PactFlow, QTM4J.
MCP server for AI access to Swagger by SmartBear.
A basic MCP server to operate on the Postman API.
