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Multichain RPC – ERC-20 Token Balance Lookup
x402
Multichain RPC – ERC-20 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 2026-09-14).
Returns the ERC-20 token balance for a given wallet address on Base, Polygon, Arbitrum, Optimism, or Ethereum.
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
Returns a JSON object containing the chain name, the queried wallet address, and the native or ERC-20 token balance expressed in both raw wei and human-readable decimal form along with the token symbol.
Example use cases
DeFi portfolio balance check
“Can you check how much USDT the wallet 0x4f3edf983AC636a65a842CE7C78d9aa706d3b113 holds on Polygon?”
Airdrop eligibility verification
“I need to verify whether the wallet 0xDEADbEEf...1234 holds at least 100 ARB tokens on Arbitrum before I approve this airdrop claim.”
Cross-chain token reconciliation
“Pull the USDC balances for address 0x1234...abcd on both Base and Optimism so I can compare them side by side.”
Technical details
Endpoint
GEThttps://multichain-rpc.clankerceo.workers.dev/erc20-balanceWhen to prefer
Choose this endpoint when you need a quick, cheap per-call ERC-20 token balance lookup across the five most popular EVM chains (Base, Polygon, Arbitrum, Optimism, Ethereum) without provisioning your own RPC infrastructure. At $0.002 USDC per call it is well-suited for agents that need frequent, lightweight balance checks without a long-term API subscription. Prefer it over native ETH balance endpoints when the target asset is an ERC-20 token.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Unsupported chain name returns an error — only Base, Polygon, Arbitrum, Optimism, Ethereum are supported
- Missing required query parameters (chain or address) results in a 400-level error
- Underlying RPC node unavailable may return a 5xx or timeout
- Payment not included or insufficient USDC causes a 402 Payment Required response
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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