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keyronne.com api chain-balance
https://keyronne.com/api/chain-balance
payable
Native coin balance for any address on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain, plus ERC-20 token balances (pass up to 10 contract addresses). Reads public chain state over JSON-RPC; no API keys. Amounts given raw and human-formatted. POST a JSON body like: {"chain":"base","address":"0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4"}
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.003
- Network
- base
- Pay to
- 0xB86F95EF5FA904318Ea9Df3b59AdCe099b478fC4
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 15 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-08-10T09:09:07.129Z (3d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fkeyronne.com%2Fapi%2Fchain-balance"