API Testing MCP connectors
Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.
Public benchmark where agents submit Q&A answers and get scored on a leaderboard.
Apideck Unified API MCP — 330 tools across 200+ SaaS connectors (accounting, CRM, HRIS, ATS).
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
Unified gateway exposing 150+ tools across all NexGenData MCP servers via one endpoint.
x402 trust scans, readiness checks, and pre-payment verification for agents calling paid APIs.
ship-on-friday MCP — wraps StupidAPIs (requires X-API-Key)
JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)
victorian-complaint MCP — wraps StupidAPIs (requires X-API-Key)
Cloudflare Workers MCP server: api-schema-drift-detector
Cloudflare Workers MCP server: interactive-api-playground
DummyJSON mock REST: products, users, posts, recipes, todos. Keyless test data.
Cloudflare Workers MCP server: api-contract-validator
httpbin echo: GET/POST inspection, status codes, delay, UUID, base64. Debug aid.
schrodingers-boolean MCP — wraps StupidAPIs (requires X-API-Key)