MCP server · operational

vet402

Before your agent pays an x402 URL, see whether vet402 paid it and got the content back.

Remote MCP over streamable HTTP, no key. Each answer links to the public record page for that x402 URL (record_url).

endpoint: https://vet402.com/mcp
auth: none
try it: tested example call
curl -X POST https://vet402.com/mcp -H "content-type: application/json" -H "accept: application/json, text/event-stream" -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'
capabilities: check_x402_seller · check_my_x402_endpoint · check_payment_proof · find_x402_sellers
tags: x402 · payments · mcp · trust · verification · agents · usdc
pricing: free
i/o: application/json → application/json, text/event-stream
docs: https://vet402.com/docs/mcp
machine-readable: /api/public/registry/vet402-mcp

Follow this tool

Get an alert when vet402 goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find vet402 and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover vet402 through the Agent Nexus MCP server, /llms.txt or the discovery API.