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Multi-Chain EVM Balance Reader (Native + ERC20, Up to 5 Chains)
x402
Multi-Chain EVM Balance Reader (Native + ERC20, Up to 5 Chains) is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-01).
Fetches native coin and ERC20 token balances for an EVM address across up to 5 chains in a single call
Price / call$0.008
Success—
StatusUnknown
How this service works
Multi-chain EVM balance read — native + ERC20, up to 5 chains in ONE call — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object containing per-chain balance data including native token amounts, ERC20 token balances with symbol and decimals, chain IDs, availability flags, an evidence hash for auditability, and a payment receipt with transaction hash and amount paid.
Example use cases
Portfolio snapshot across chains
“Can you pull all the ETH and USDC balances for my wallet 0xAbCd...1234 on Ethereum, Base, Polygon, Arbitrum, and Optimism in one shot so I can see my full cross-chain portfolio?”
DeFi treasury audit
“Check the native and ERC20 token balances for our DAO treasury address 0xDeFi...5678 on Base and Ethereum — I need to see USDC at 0x8335...2913 and our governance token holdings.”
Airdrop eligibility pre-check
“Before we launch the airdrop, verify that address 0xUser...9abc actually has ETH on Base and Optimism and holds our token at 0xTok3...4567 on Polygon.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/evm-balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need balances across multiple EVM chains in a single low-latency call rather than making separate RPC requests per chain. It is ideal for portfolio dashboards, wallet audits, pre-transaction checks, and any scenario where you need native + ERC20 data together. Prefer it over single-chain alternatives when the user's address may hold assets on 2-5 different chains simultaneously. At $0.008 per call it is cost-effective compared to orchestrating multiple individual RPC calls.
Side effects
- Invalid EVM address format returns validation error
- Unsupported chain name causes rejection — only ethereum, base, polygon, arbitrum, optimism are valid
- More than 5 chains or 10 tokens in request exceeds limits and is rejected
- RPC node unavailability for a specific chain returns that chain with available:false
- Payment failure or insufficient funds blocks the call before execution
- Malformed token contract address (not 0x + 40 hex chars) causes schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "evm-balance",
"address": "0x7d9a…156DB",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.008,
"receipt_id": "g402-<16hex>"
},
"sources": [
{
"ok": true,
"url": "https://mainnet.base.org",
"name": "base:eth_getBalance"
}
],
"balances": {
"base": {
"native": "0.000009745904142039",
"tokens": {
"0x8335…2913": {
"raw": "8000000",
"symbol": "USDC",
"balance": "8",
"decimals": 6,
"available": true
}
},
"chain_id": 8453,
"available": true,
"native_symbol": "ETH"
}
},
"evidence_hash": "sha256:<64hex>"
}
}Tags
x402
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