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Multichain RPC Token Balance Lookup
x402
Multichain RPC Token Balance Lookup is a paid API for AI agents from multichain-rpc.clankerceo.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Returns the ERC-20 token balance (and native coin balance) for a wallet address on a specified EVM chain
Price / call$0.002
Success—
StatusUnknown
How this service works
Cheap, factual EVM chain lookups priced per call in USDC. Base, Polygon, Arbitrum, Optimism and Ethereum.
Output
A JSON object containing the chain name, the wallet address queried, and a native balance object with wei amount, human-readable decimal amount, and token symbol (e.g. ETH). For ERC-20 tokens, equivalent balance fields are returned for the specified token contract.
Example use cases
DeFi portfolio balance check
“Can you check how much USDC wallet 0x1234...abcd is holding on Arbitrum?”
Pre-transfer balance verification
“Before I send tokens, confirm that 0xDeF...789 has at least 500 USDT on Polygon.”
Multichain wallet audit
“Look up the native ETH balance and any token holdings for address 0xABC...999 on Optimism so I can see what's in that wallet.”
Technical details
Endpoint
GEThttps://multichain-rpc.clankerceo.workers.dev/token-balanceWhen to prefer
Choose this endpoint when you need a fast, cheap, per-call token or native balance lookup across major EVM chains (Base, Polygon, Arbitrum, Optimism, Ethereum) without setting up your own RPC node. At $0.002 USDC per call with x402 micropayment support, it's ideal for AI agents that need on-demand, factual on-chain balance data without a monthly subscription. Prefer it over self-hosted RPC when minimizing infrastructure overhead matters, or over general Web3 APIs when you need a simple pay-per-use model.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Unsupported chain identifier returns an error — only Base, Polygon, Arbitrum, Optimism, and Ethereum are supported
- Missing required query parameters (chain or address) returns a 400-level error
- Network or RPC node timeout may return a 500-level error
- Payment failure (insufficient USDC, x402 not supported by client) blocks the request entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"native": {
"wei": "1000000",
"amount": "0.000001",
"symbol": "ETH"
},
"address": "0x…"
}
}Tags
x402
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