"How to handle REST APIs" matching MCP connectors:
Matching 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
Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.
Deterministic recipe verification engine — validates AI-generated recipes against master SOPs.
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
Pay-per-call AI evaluation MCP server. Score LLM outputs against benchmark rubrics via Workers AI.
Generate realistic, FK-consistent synthetic test data for your databases from your AI assistant.
3rd Generation Testing (3TG) — generate deterministic test suites from Markdown spec tables via MCP.
MCP-native AI browser testing for coding agents. Submit a URL + goal, get back action trail, bugs, screenshots, and WebM video your agent patches from directly. 43 tools, 12 AI evaluation personalities, combo tiers with auto-pause-on-bugs, throwaway email + SMS inboxes.
DummyJSON mock REST: products, users, posts, recipes, todos. Keyless test data.
Validate up to 75,000 URLs per job (status, redirects, response times). OAuth 2.1.
End-to-end API testing — generate and run tests from OpenAPI, curl, Postman, or real user traffic.
Check if your MCP server is ready to publish on the MCP Registry, Smithery, or npm.
MCP server providing access to the Scorecard API to evaluate and optimize LLM systems.
Programmatic email deliverability testing for AI agents. Create inbox placement tests across Gmail, Outlook, Yahoo, Mail.ru, Yandex — get per-provider placement (Inbox/Spam/Promotions), SPF/DKIM/DMARC auth, Rspamd & SpamAssassin verdicts, DNS health, and live SSE results.
MCP server for AI access to SmartBear tools, including BugSnag, Reflect, Swagger, PactFlow, QTM4J.
Official MCP server for Qase — manage test cases, runs, suites, defects via AI tools.
AI-native mock API server with MCP. Create REST/SOAP mocks from Claude, Cursor, or Windsurf.