13 pay-per-call x402 tools for AI agents on Base (eip155:8453), USDC via CDP facilitator: live web search & extraction, company research & enrichment, counterparty risk screening, email deliverability, FX rates, LEI/company identity, invoice/IBAN validation, utilities — plus a free aggregated x402 discovery API. Machine-readable catalog at /.well-known/x402 and /openapi.json.
| verified | Not yet: listing not claimed with domain proof. |
| trusted | Not yet: needs Live-Tested. |
[](https://agentropolis.io/listing/x402.agentbit)