"Multi-Agent Systems with Shared Memory Storage" 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.
Discovery registry for AI agents: 660+ APIs, MCP servers and CLIs, each health-checked every 6 hours with real requests — full initialize + tools/list handshakes for MCP, real calls for APIs — plus response-schema validation that catches responses which parse fine but are missing a required field.
Agent Observatory: checks A2A, MCP and OpenAPI declarations and logs published changes.
Retrieve YouTube transcripts with timestamps, native captions and asynchronous generation when captions are unavailable. Requires a Capslane API key.
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
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Check x402 endpoints like a paying agent: diagnose, fix plans, pre-payment checks. Free quick check.
Any API, four tools: discover, call with routing and signed receipts, verify, dispute.
What is known to be broken in an MCP server or API operation, with the check that found it.
Free agent tests (no account or payment); paid ping.
Paid OpenAPI audit and API change detection for agents. $0.10 USDC per analysis via x402 on Base.
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.
MYCELIX agent research and read-only MCP verification with verify_mcp_endpoint.
Free agent-service discovery, OpenAPI document checks, and receipt verification. No API key needed.
Web search for agents, one x402 payment: real results, provider failover, signed receipt. $0.01.
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