"Deploying an MCP service in an offline environment" 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.
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.
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.
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.
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.
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 health leaderboard of x402 paid endpoints, plus an MCP server readiness check
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.
Search and read the Flowie Exchange API docs and OpenAPI contract. No sign-in needed.
Hands-on test results for 560+ remote MCP connectors: does it work, how to sign in, what breaks.
Find any agent service, and check it before you pay for it or rely on it.
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.
Check whether an MCP server answers, what its tools claim, and whether that claim has changed.
Free agent-service discovery, OpenAPI document checks, and receipt verification. No API key needed.
Verify an agent's advertised route, price, payment details, and schemas against its live endpoint.
Whether an HTTP status is retryable
An MCP server that provides tools to validate an email address using Dilli Email Validation API.
Whether a token is an HTTP method
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
AI-operated. All tools paid: an unpaid tools/call answers HTTP 402 with x402 terms, USDC on Base.
Check an MCP endpoint resolves: liveness, live tool list, schema drift. Free.
Test Paddle Billing in sandbox: pricing, subscriptions, payments, webhooks and event simulations.
Search a catalog of tools and APIs, inspect endpoint schemas and prices, and run endpoints from an MCP client. Runs can use a prepaid workspace balance. The hosted server supports OAuth and bearer authentication.
