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x402 Base Tools – ETH & ERC-20 Balance Lookup
x402
x402 Base Tools – ETH & ERC-20 Balance Lookup is a paid API for AI agents from base.kagurazaka.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Returns ETH and ERC-20 token balances for a Base address, with USD values for ETH, stablecoins, and up to five held tokens priced from on-chain pools.
Price / call$0.001
Success—
StatusUnknown
How this service works
The ETH balance and ERC-20 balances of an address on Base, for the tokens you name or a default list of well-known tokens (USDC, WETH, cbBTC, AERO, DAI, USDT, DEGEN, VIRTUAL and others), with USD values for ETH, stablecoins and up to five other held tokens priced from their pools.
Output
A JSON object containing the address's ETH balance as a string, an array of token objects (each with symbol, amount, and USD value), the ETH USD value, and a total_usd figure summing all priced holdings.
Example use cases
DeFi portfolio snapshot for a user
“Can you check the full token balances for Base wallet 0xABCD...1234 and tell me the total USD value, including ETH, USDC, and any other tokens they hold?”
Stablecoin balance check before a payment
“Before I send a payment, can you check how much USDC and DAI the address 0x9988...aabb has on Base right now?”
Monitoring a specific token holding
“How much AERO and VIRTUAL does the Base address 0x1122...3344 currently hold, and what are they worth in USD?”
Technical details
Endpoint
GEThttps://base.kagurazaka.dev/v1/balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need both raw token balances and USD valuations for a Base address in a single call. It is ideal for portfolio summaries, pre-payment checks, and DeFi dashboards on Base. Prefer it over separate price and balance calls when you want aggregated USD totals including ETH and a broad default token list without specifying every address.
Side effects
- Invalid or malformed wallet address returns an error
- Unknown token symbol or address not found in the default list returns no entry for that token
- Token without a liquid Uniswap v3 or Aerodrome pool may have no USD value
- More than 20 tokens specified returns a validation error
- Network congestion on Base may cause slow or timed-out RPC reads
- Address with zero balances returns empty token array and zero total_usd
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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