API Development MCP Servers for HTTP / API

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

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Cloudflare Workers MCP server: api-composition-gateway

Cloudflare Workers MCP server: api-landing

Meaning of HTTP 412.

Meaning of HTTP 418.

Meaning of HTTP 428.

Meaning of HTTP 505.

Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.

JSON Accept hint

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

Apideck Unified API MCP — 229 tools across 200+ SaaS connectors (accounting, HRIS, file storage).

Inspect external HTTPS 429/503 retries with server-recorded attempts, Retry-After and arrival times.

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Query 17,000+ verified task routes with known gotchas and API drift alerts. Free keyless reads.

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Build, validate, deploy — HTTP APIs, cron jobs, webhooks and MCP tools — from your AI client.

Cloudflare Workers MCP server: api-changelog-tracker

Read-only ArcadeOps discovery for developer docs, OAuth, OpenAPI and synthetic sandbox.