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x402.valkyry.fr Wallet Balance
x402
x402.valkyry.fr Wallet Balance is a paid API for AI agents from x402.valkyry.fr, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-29).
Returns native token and ERC-20 token balances for a given EVM wallet address on a specified network
Price / call$0.003
Success—
StatusUnknown
How this service works
On-chain native + ERC-20 token balances for any EVM address across Ethereum, Base, Arbitrum, Optimism and Polygon. For wallet-tracking and DeFi agents.
Output
A JSON object with a 'native' field containing the native token symbol and formatted balance (e.g. ETH: 1.23), a 'tokens' array with any requested ERC-20 token balances, and the network identifier (e.g. eip155:1).
Example use cases
Example prompt
“What's the current ETH balance and USDC token balance for wallet 0xAbC123...def on the Base network?”
Technical details
Endpoint
POSThttps://x402.valkyry.fr/wallet-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to check native or ERC-20 token balances for an EVM wallet address across major networks (Ethereum, Base, Arbitrum, Optimism, Polygon) and want a pay-per-call micro-API with no subscription required. Prefer over self-hosted RPC calls when you lack a node provider, or when building lightweight agent workflows.
Side effects
- Invalid or malformed EVM address returns an error
- Unsupported network name causes a bad request response
- Invalid ERC-20 token contract address may return empty or error
- Payment failure via x402 protocol results in 402 response before processing
- Network RPC unavailability may cause timeout or error
Input
{
"tokens": [
"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
],
"address": "0x1234567890123456789012345678901234567890",
"network": "ethereum"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| tokens | array | Optional ERC-20 token addresses to include |
| address | string | EVM address (0x…) |
| network | string | ethereum | base | arbitrum | optimism | polygon (default ethereum) |
Output
{
"native": {
"wei": "17373447080759505555",
"symbol": "ETH",
"formatted": "17.373447080759505555"
},
"tokens": [
{
"token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"symbol": "USDC",
"balance": "614170",
"formatted": "0.61417"
}
],
"address": "0x1234567890123456789012345678901234567890",
"network": "eip155:1",
"fetchedAt": "2026-07-01T05:24:40.990Z"
}Schema · Response
{
"type": "json",
"example": {
"native": {
"symbol": "ETH",
"formatted": "1.23"
},
"tokens": [],
"network": "eip155:1"
}
}Tags
x402
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