"The role of planning in project development" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
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.
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.
Write, check, render and save sequence diagrams with the request and response on every arrow.
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.
Signed declarations of HTTP API exchanges for agent handoffs. Free preparation and verification; receipt issuance costs 0.002 USDC via x402 on Base. Start and connect: https://datoka.dev/api. Signatures attest declared data, not independent truth.
Read and submit the CurlShip directory. Paid actions return checkout_url.
GXEON services, prepaid packs from R$0.99, purchase planning, and agent buyer guidance.
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.
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.
Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.
Verified, reproduced behavior of public HTTP APIs: spec gaps, errors, pagination, auth.
What is known to be broken in an MCP server or API operation, with the check that found it.
Audits a sample of HTTP request URLs against explicit, documented cache-key standardization rules...
Independent checks of paid x402 data sellers and of AI-agent access to shopping and travel sites
Webhook URLs for AI agents: receive, wait for, replay, sign and verify webhooks (Stripe, GitHub…).
Turn any task into the right API calls: discover, evaluate, and integrate public APIs.
Experimental MCP server for current empirical verification of explicit public HTTPS endpoint claims.
Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.
Meaning of HTTP 406.
Meaning of HTTP 415.
Swagger Petstore API (v1.0.27) as MCP for testing and prototyping powered by the HAPI MCP server
