API Development MCP Servers for Perplexity

Free pilot: checked JSON Schema regression examples for a limited subset; no compatibility proof.

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

Sanctions API docs and request validation, with account-linked synthetic sandbox testing.

SOAP Envelope shape, markup discarded

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

Generates deterministic webhook HMAC-SHA256 fixtures and optionally verifies a supplied signature...

WSDL operation count, body discarded

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

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

Cloudflare Workers MCP server: api-changelog-tracker

Connect AI agents to 580+ APIs with OAuth or API-key auth. Hosted gateway; API pricing varies.

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

AsyncAPI channel count, body discarded

MCP server for AI coding agent terminal-to-terminal communication. Local-first, SQLite-backed, webhook-integrated.

Apache Camel API Gateway with REST-to-MCP bridging for LLM agents.

Content-Type token shape

What is known to be broken in an MCP server or API operation, with the check that found it.

Webhook, email, WebSocket and tunnel testing for AI agents: capture, wait, verify, replay.

Meaning of HTTP 410.

Meaning of HTTP 412.

Meaning of HTTP 418.