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Ethereum Mainnet ETH Balance Lookup
x402
Ethereum Mainnet ETH Balance Lookup is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, not verified (last probed 2026-10-29); live alternatives: agentsvc.io EVM Balance Lookup ($0.002) and Multichain Wallet Portfolio ($0.005).
Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5. Live alternatives for the same use case: agentsvc.io EVM Balance Lookup ($0.002) · Multichain Wallet Portfolio ($0.005).
Returns the native ETH balance of an Ethereum address in wei, ETH, and optionally USD value via LlamaRPC
Price / call$0.005
Success—
StatusUnknown
How this service works
Ethereum mainnet native ETH balance for an address via LlamaRPC (no API key). Returns wei, eth, and optional USD value. Use ?address=0x... and with_usd=true. Built for AI agents doing portfolio reporting, fraud screening, and wallet onboarding. Accepts payment on Base or Solana — either network works.
Output
A JSON object containing the queried Ethereum address, its balance in wei (raw), its balance in ETH (human-readable), and optionally its current USD equivalent value based on live pricing.
Example use cases
Example prompt
“What's the current ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — show me the amount in both ETH and USD?”
Technical details
Endpoint
GEThttps://api.x402node.dev/chain/eth-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain native ETH balance for a specific Ethereum mainnet address without setting up your own RPC node or API key. Ideal for AI agents doing portfolio reporting, wallet onboarding checks, or fraud screening where a quick wei/ETH/USD balance lookup is needed. Prefer over manual RPC calls for convenience and built-in USD conversion.
Side effects
- Invalid or malformed Ethereum address returns an error
- LlamaRPC upstream outage causes timeout or 5xx
- USD price feed unavailable when with_usd=true requested
- Non-checksum address format may be rejected
- Rate limiting or payment failure at x402 layer
Input
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"with_usd": true
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"eth": 5.69070571,
"usd": 9832.7428,
"wei": "5690705707505023098",
"_hint": "x402 paid endpoints for AI agents — x402node.dev (utilities) · cn402.com (Chinese culture)",
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"eth_usd_rate": 1727.86
}Tags
x402
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