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x402 Base Tools – Address Balance
x402
x402 Base Tools – Address Balance is a paid API for AI agents from wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Returns the ETH balance and ERC-20 token balances of a Base address, with USD valuations for ETH, stablecoins, and up to five other held tokens priced from on-chain pools.
Price / call$0.001
Success—
StatusUnknown
How this service works
Base mainnet data for agents, read live from the chain and paid per call in USDC: gas prices and costs, token prices from Uniswap and Aerodrome pools, balances, token info, transaction decoding, x402 payment checks, EIP-3009 authorization status, Basenames and address profiles. Lookups of things that do not exist are not charged.
Output
A JSON object containing the ETH balance as a string, an array of token objects (each with symbol, amount, and usd_value), the queried address, the ETH USD value, and a total_usd figure summing ETH plus all priced tokens.
Example use cases
DeFi portfolio snapshot for a user
“Can you check the full token balances and USD value of my Base wallet 0xABCD...1234? I want to see ETH, USDC, WETH, and any other tokens I'm holding.”
Stablecoin balance check before payment
“Before I send a payment, can you confirm how much USDC and DAI the address 0x9988...7766 holds on Base right now?”
Token gate verification for dApp access
“Does the Base address 0x1122...3344 hold at least 100 DEGEN or any VIRTUAL tokens? Check their balances for me.”
Technical details
Endpoint
GEThttps://wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws/v1/balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a one-call portfolio snapshot of any Base address, including ETH plus multiple ERC-20 balances with USD pricing — especially when you want well-known DeFi tokens (USDC, WETH, cbBTC, AERO, DEGEN, VIRTUAL, etc.) without having to specify each one. Prefer it over raw RPC calls when USD valuation is needed, or over a generic token price endpoint when you want balances and prices together in a single response.
Side effects
- Invalid or malformed wallet address returns an error
- Token symbol not recognized defaults to the well-known list rather than failing
- More than 20 tokens specified in the comma-separated list may be rejected
- Tokens with no liquidity pool on Base may return without a USD value
- Network or Lambda timeout if Base RPC is slow
- Non-Base (e.g. Ethereum mainnet) addresses return Base-chain data only, not cross-chain balances
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"eth": "0.0001",
"tokens": [
{
"amount": "2.89",
"symbol": "USDC",
"usd_value": 2.89
}
],
"address": "0x5672...",
"total_usd": 3.13,
"eth_usd_value": 0.24
}
}Tags
x402
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