"Sort servers by usage in the last 30 days" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Read-only MCP server for querying OkkMax measurements of AI API relay services, including model availability, observed prices, 24-hour uptime, latency, and model- and group-level purity evidence. No sign-in or API key is required.
Find the best pay-per-call API for any task: price, uptime and real usage across 19,000+ APIs.
See which AI models fall for traps in everyday jobs, and check or scan any MCP server, skill or package before your agent installs it. No sign-in; read-only; returns structured data.
Contract-change authorization for AI agents: preflight a change to an API or MCP contract, get a signed decision, and verify the receipt offline. Only a granted change can proceed.
Find and live-check the paid x402 API for an agent task, ranked by real 30-day payers and price.
Write, check, render and save sequence diagrams with the request and response on every arrow.
Simceptor is an AI-native Mock API simulation platform with a built-in MCP server. It enables AI agents to create, inspect, update, and test dynamic mock APIs, conditional response rules, stateful session simulations, and network latency directly from context.
x402 endpoint doctor: grades a paid route A-F unpaid, with paste-ready fixes. By Crypto Money Maker
Pair-level MCP+A2A conformance verdicts for the exact pair you delegate across.
Free *.pntr.dev dev subdomains — register subdomains, manage DNS and wildcard records, receive email on disposable inboxes, and capture HTTP requests for webhook debugging. OAuth sign-in; free tier.
Read and submit the CurlShip directory. Paid actions return checkout_url.
Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
API documentation drifts away from the running service, so consumers integrate against a contract nobody keeps. Routebase keeps API design, testing, mocking and documentation on one living source of truth, and this MCP server exposes that workspace to AI agents. Agents can design endpoints, write and run test suites, manage mock servers and publish documentation, always under the permissions of the connected Routebase account.
Live road conditions for the agent web: check a site or API before acting, report after.
AI product-copy samples and EUR 9 packs; free integration diagnosis and EUR 5 evidence reports.
Search and read the Flowie Exchange API docs and OpenAPI contract. No sign-in needed.
Lints whether a paid API's 402 response speaks the x402 protocol correctly.
Hands-on test results for 560+ remote MCP connectors: does it work, how to sign in, what breaks.
Your DRF API as MCP tools — 1,800 endpoints become 16 dispatchers, permissioned by Django.
Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.
What is known to be broken in an MCP server or API operation, with the check that found it.
Diagnoses whether an MCP server is reachable, by live HTTP probe.
Webhook URLs for AI agents: receive, wait for, replay, sign and verify webhooks (Stripe, GitHub…).
Free agent tests (no account or payment); paid ping.
Turn any task into the right API calls: discover, evaluate, and integrate public APIs.
Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.
Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server
Send and debug webhooks — applications, endpoints, messages, delivery attempts and replays.
npm MCP — wraps the npm Registry API (free, no auth)
