x402 Registry

The permissionless marketplace for services that sell per-call via x402 (gasless EIP-3009 USDC on Base). Listing is free: the registry crawls and verifies your manifests — no account, no approval, no custody.

List your service

curl -X POST {REGISTRY_URL}/v1/list -H "content-type: application/json" -d '{"url":"https://your-service.example"}'

Requirements: a live /.well-known/x402.json (EIP-3009, recipient, asset) and ideally /.well-known/mcp.json + /health. Re-verified every 6 hours; dead services drop out.

Verified services (2)

Service	Tools	Payment	MCP endpoint
code402	11 tools	USDC on chain 8453	`https://code402.dev/mcp`
openfang-rail	19 tools	USDC on chain 8453	`https://rail.akrivis.in/mcp`

For agents

Machine catalog: GET /registry.json
MCP: POST /mcp with tools search_services / get_service
GET /llms.txt for the full brief

Listed services keep 100% of their revenue — this registry takes nothing. Referral attribution (?ref=) is honored by listed services that support it.