Native + USDC balance and transaction count for an address on Base or Ethereum. It is built for autonomous AI agents: discover it, pay for it, and consume it in a single request via the x402 protocol — no API key, no account.
GET https://x402render.vercel.app/onchain
Example: /onchain?address=0x46F8f713331A0eB5086Ea93857a8165e97bEe498&chain=base
address | string — 0x address (required) |
chain | enum base|eth (default base) |
The endpoint returns HTTP 402 Payment Required with the price, asset (USDC), network (Base / eip155:8453), and pay-to address. Your agent pays on-chain and resends with the payment proof header. Compatible with @coinbase/x402 and @piprail/sdk.
See the full catalog at x402render, the machine-readable list at /discovery/resources, or the spec at /openapi.json.