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Semilla1 Lab txcheck - Token Balances
x402
Semilla1 Lab txcheck - Token Balances is a paid API for AI agents from semilla1-txcheck.netlify.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).
Returns token balances for a given EVM address on Base, checking USDC, WETH, cbETH, and other major Base tokens.
Price / call$0.005
Success—
StatusUnknown
How this service works
Resumen de una transacción de Base: estado, gas, transferencias USDC. Pago x402 v2: 0.01 USDC en Base (lote de hasta 10: 0.05 USDC; /balance, /tokens, /receipt: 0.005 USDC).
Output
Returns a JSON object with the queried address, a list of tokens checked (USDC, USDbC, WETH, cbETH, wstETH, cbBTC, DAI, EURC, AERO, VIRTUAL, DEGEN, BRETT), and for each token with a non-zero balance: the token symbol, contract address, decimal precision, raw balance string, and human-readable amount.
Example use cases
DeFi portfolio snapshot for a Base wallet
“Can you check what tokens wallet 0xa4ba7f4FCA58C50df7232BA65E8D794F78Dc65bc holds on Base? I want to see if it has any USDC, WETH, or cbETH.”
Verify USDC balance before payment
“Before I send funds, can you confirm whether address 0x1234567890abcdef1234567890abcdef12345678 has any USDC balance on Base?”
Monitor airdrop recipient token holdings
“Check the token balances on Base for address 0xAbCdEf1234567890AbCdEf1234567890AbCdEf12 — I want to see if they received BRETT, AERO, or VIRTUAL from the airdrop.”
Technical details
Endpoint
GEThttps://semilla1-txcheck.netlify.app/tokens?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to quickly check which major Base-ecosystem tokens a specific EVM wallet holds, especially when you want a pre-curated list of top Base tokens (USDC, WETH, cbETH, AERO, BRETT, etc.) checked in a single call rather than querying individual token contracts. Best for portfolio lookups, pre-payment balance verification, and airdrop monitoring on Base.
Side effects
- Invalid or malformed EVM address (not matching ^0x[0-9a-fA-F]{40}$) returns an error
- Address has no token balances — returns empty tokens array
- RPC or Base node connectivity issues may cause delayed or failed responses
- Payment not included or insufficient — x402 payment of 0.005 USDC required per call
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tokens": [
{
"raw": "2000000",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": 2,
"symbol": "USDC",
"decimals": 6
}
],
"address": "0xa4ba7f4FCA58C50df7232BA65E8D794F78Dc65bc",
"checked": [
"USDC",
"USDbC",
"WETH",
"cbETH",
"wstETH",
"cbBTC",
"DAI",
"EURC",
"AERO",
"VIRTUAL",
"DEGEN",
"BRETT"
]
}
}Tags
x402
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