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Polygon PoS Wallet Balance Checker
x402
Polygon PoS Wallet Balance Checker is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Returns the native POL balance and up to 20 ERC-20 token balances for a given Polygon PoS wallet address, with human-readable formatting using each token's symbol and decimals.
Price / call$0.005
Success—
StatusUnknown
How this service works
Native POL balance of a Polygon PoS wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Polygon PoS.
Output
A JSON object containing the wallet address, the native POL balance as a human-readable string, and an array of token objects each with: the ERC-20 contract address, symbol, decimals, raw balance integer string, and formatted decimal balance string. All values are read live from Polygon PoS.
Example use cases
DeFi portfolio snapshot for a wallet
“Can you pull up the current POL balance plus USDC and WETH holdings for my Polygon wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045? Token contracts are 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 for USDC and 0x7ceB23fD6bC0adD59E62ac25578270cFf1b9f619 for WETH.”
Verify payment received in Polygon wallet
“Did the payment arrive? Check if wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9b on Polygon PoS has any USDC balance — the contract is 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359.”
Monitor airdrop token distribution
“Check whether address 0x1234567890123456789012345678901234567890 on Polygon received the airdropped tokens — look up the balance for contract 0xBbba073C31bF03b8ACf7c28EF0738DeCF3695683 along with their native POL balance.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/polygon/balances?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need live, formatted ERC-20 and native POL balances specifically on the Polygon PoS network, especially when you want multiple token balances in a single call. Prefer it over generic blockchain explorers when you need machine-readable decimal-formatted output without parsing raw wei values yourself. Use it over Ethereum or other chain endpoints when the wallet activity is on Polygon PoS.
Side effects
- Invalid wallet address format returns a validation error (address must match 0x + 40 hex chars)
- Invalid or non-existent ERC-20 contract address may return zero balance or an error
- More than 20 token addresses in the tokens parameter will be rejected
- Network or RPC unavailability may cause timeouts or 5xx errors
- Non-Polygon addresses (e.g. Ethereum mainnet-only contracts) may return zero or unexpected data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "polygon",
"tokens": [
{
"raw": "9885164",
"token": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"symbol": "USDC",
"balance": "9.885164",
"decimals": 6
},
{
"raw": "2622273351494",
"token": "0x53E0bca35eC356BD5ddDFebbD1Fc0fD03FaBad39",
"symbol": "LINK",
"balance": "0.000002622273351494",
"decimals": 18
}
],
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"nativeSymbol": "POL",
"nativeBalance": "592.719767156691654977"
}
}Tags
x402
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