API Development MCP Servers for HTTP / API

Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.

Whether a token is an HTTP method

WSDL 2.0 interface count, markup discarded

Discover x402 APIs by capability, price & trust. Powered by x402Scout.

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

Discover, rate and compare APIs and providers in the APIs.io catalog; manage a listing you own.

Signed API declarations for agent handoffs. Free demo and verification; receipts cost 0.002 USDC.

Public webhook relay with signed observations, retries and verified receivers. Self-service.

Premium agentic endpoint for api-key-load-balancer-mcp.

Premium agentic endpoint for api-rate-limit-enforcer-mcp.

Cloudflare Workers MCP server: form-backend

Behind Check and GAIP Watch, and Diagnose: A2A, MCP and OpenAPI checks with a dated change log.

Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.

Public webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.

Public HTAG discovery for MCP tools, API endpoints, OpenAPI ops, and agents.

Meaning of HTTP 501.

AI-callable tools for API mocking, testing, monitoring, security, and automation.

Scores how well AI agents will use your API, 0-100, from its OpenAPI spec. Free and read-only.

Schema-aware API monitoring: diff OpenAPI specs for breaking changes, manage endpoints.

Free MCP, API auth, webhook and schema diagnostics with bounded checks and safe quote routing.

Deterministic JSON Schema validation with exact violations and conservative type normalization.