Agent Evidence Utilities
Deterministic package, vulnerability, repository, and citation evidence APIs for autonomous agents. Four x402 routes on Base.
x402 verified · Verified on /v1/dependency-truth ยท $0.005 · $0.004–$0.006 USDC/request · 4 endpoints / 4 tools · Verification · base network · x402 protocol
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpHow to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.