API Development MCP Servers

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

Manage Kong Konnect AI and API gateways, routes, plugins, and analytics from your agent.

Generate secured CRUD APIs over your database, run SQL, manage files, tasks and a headless browser

Turn any task into the right API calls: discover, evaluate, and integrate public APIs.

Search otwarteAPI.pl: a catalog of public Polish & EU government/data APIs, for AI agents. Keyless.

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

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

HTTP status code reference MCP.

One MCP endpoint over 69 public PPN APIs: search_apis to discover, execute_api to call. Free tier.

Deterministic API regression checks for AI agents: snapshot a baseline, catch broken contracts.

Thrift field-id count, body discarded

Unified.to MCP server — one API for 500+ B2B SaaS integrations across 28+ categories

WADL resource count, body discarded

Send, retry and monitor webhooks: manage endpoints, event types and API keys (OAuth).

Ephemeral HTTPS inbox for bots: mint URL, capture POSTs, list JSON. TEST. https://inbox.kymac.co

Whether a token is an HTTP method

WSDL 2.0 interface count, markup discarded

WSDL operation count, body discarded

X-Real-IP IPv4/IPv6 shape, value discarded

Try 26 utility REST APIs keylessly: NAICS classification, IP geo, email validation, currency.

Verify an agent's advertised route, price, payment details, and schemas against its live endpoint.