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Chain Live Balance Lookup
x402
Chain Live Balance Lookup is a paid API for AI agents from x402-gateway-production-1f21.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Fetches the live on-chain token balances for a given Ethereum-compatible wallet address on Base or Ethereum networks.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.
Output
Returns a JSON object with live on-chain balance data for the specified wallet address, including balances for each requested token contract address on the specified network (Base or Ethereum). The response confirms readiness with a status field and includes the wallet's current holdings.
Example use cases
DeFi portfolio balance snapshot
“Can you pull the live on-chain balances for wallet 0xAbC1234567890123456789012345678901234567 on the Base network, including these three token contracts: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, 0x6B175474E89094C44Da98b954EedeAC495271d0F, and 0x4200000000000000000000000000000000000006?”
Ethereum wallet holdings check
“Look up the current token balances for address 0x1234567890abcdef1234567890abcdef12345678 on Ethereum mainnet — I want to see what ERC-20 tokens it holds.”
Agent treasury monitoring
“Fetch the realtime on-chain balance for our agent's treasury wallet 0xDeAdBeEf0000000000000000000000000000dEaD on Base so I can confirm the funds are still there.”
Technical details
Endpoint
POSThttps://x402-gateway-production-1f21.up.railway.app/chain/live-balance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time, live on-chain token balance data for a specific wallet address on Base or Ethereum. It is ideal for DeFi portfolio monitoring, agent treasury checks, and multi-token balance lookups in a single call. Prefer this over centralized exchange APIs when you need trustless, chain-verified balance data. The x402 micropayment model makes it cost-effective for per-query agent workflows without subscription overhead.
Side effects
- Invalid Ethereum address format (not matching 0x + 40 hex chars) returns a validation error
- Unsupported network value returns an enum mismatch error
- More than 20 token addresses in the tokens array exceeds the maxItems limit and is rejected
- RPC node unavailability or blockchain congestion may cause timeouts
- Wallet with no holdings returns empty or zero balances rather than an error
- Payment failure via x402 protocol prevents request from processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"status": "ready"
}
}Tags
x402
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