API Development MCP Servers for Codex CLI

Retry-After integer-or-date, value discarded

Any API, four tools: discover, call with routing and signed receipts, verify, dispute.

AI-native mock API server with MCP. Create REST/SOAP mocks from Claude, Cursor, or Windsurf.

MCP server for AI access to Swagger by SmartBear.

SSE Accept hint

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

Accept-Post media-type count, value discarded

Dynamic API tool generator for OpenAPI, GraphQL, and AsyncAPI specifications

Cloudflare Workers MCP server: api-contract-validator

Sixteen years of API research as MCP tools — stories, areas, governance blocks & services

Signed, offline-verifiable contract-change authorization. Only a granted change can proceed.

Cloudflare Workers MCP server: api-mock-server

Cloudflare Workers MCP server: api-payload-auditor

Cloudflare Workers MCP server: api-perf-analyzer

Cloudflare Workers MCP server: api-request-deduplicator

Cloudflare Workers MCP server: api-schema-drift-detector

Lint OpenAPI 3.x documents for missing security, responses, descriptions and versioning.

MCP Server for Bling