"An exploration of Google, the popular search engine." matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
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.
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.
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.
Write, check, render and save sequence diagrams with the request and response on every arrow.
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.
Pair-level MCP+A2A conformance verdicts for the exact pair you delegate across.
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.
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.
Check an x402 endpoint before you pay it, then test a payment and follow it to settlement.
Live road conditions for the agent web: check a site or API before acting, report after.
Live health leaderboard of x402 paid endpoints, plus an MCP server readiness check
npm MCP — wraps the npm Registry API (free, no auth)
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Web search API benchmark for AI agents: You.com, Tavily, Exa, Parallel. Results and charts.
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.
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.
Search public A2A agents and inspect read-only Agent Card and endpoint checks.
Audits a sample of HTTP request URLs against explicit, documented cache-key standardization rules...
Free MCP, API auth, webhook and schema diagnostics with bounded checks and safe quote routing.
Read-only HotAPI documentation: search integration guides and inspect OpenAPI operations.
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…).
Independent checks of paid x402 data sellers and of AI-agent access to shopping and travel sites
Check whether an MCP server answers, what its tools claim, and whether that claim has changed.
