"Finding a tool for weekly Gangnam restaurant recommendations and reservations via Catch Table" matching MCP connectors:

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

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

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.

Deterministic JSON checks with signed evidence and x402-paid execution

Check an MCP endpoint resolves: liveness, live tool list, schema drift. Free.

Discover, pay for, execute, and publish APIs through Apiosk.

Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.

Instant no-signup webhook & HTTP-request inspector for testing webhooks and agent tool-callbacks.

Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.

Verify x402 endpoints before payment or publish service profiles for agent discovery.

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

Keyless webhook endpoints: capture, wait, replay, forward, and generate types from real traffic.

Debug webhooks from your AI agent: inspect and replay captured webhooks on localhost.

API governance for AI agents. Detects breaking changes, scores blast radius, blocks unsafe calls.

Unified gateway exposing 150+ tools across all NexGenData MCP servers via one endpoint.

End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.

The official MCP Server for the Mux API

Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server

40+ developer tools from Context7, Code Runner, Python Execute, NPM Sentinel, PlantUML, and Microsoft Learn. Docs lookup, code execution, security scanning. Starts at $0.01/call. Get your API key at app.xpay.sh or xpay.tools