Data Lookup API
Check a wallet's live balance on Base mainnet: native ETH (e.g. to confirm it has enough for gas) plus an optional ERC20 token balance (e.g. USDC) when a token contract address is supplied. Sourced from Base's official public RPC.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 171 ms
- Price
- $0.012 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Blockchain reads
- Address
- https://x402-seller.onrender.com/chain/balance
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/1d930c43bbe2.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).