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AgentFund On-Chain Token Balances (Bulk)
x402
AgentFund On-Chain Token Balances (Bulk) is a paid API for AI agents from x402.agentfund.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Fetches ERC-20 token balances for up to 500 EVM wallet addresses in a single call across major chains
Price / call$0.01
Success—
StatusUnknown
How this service works
On-chain Token Balances (bulk)
Output
Returns a mapping of each queried EVM address to its current balance of the specified ERC-20 token (defaulting to USDC) on the chosen blockchain network, covering up to 500 addresses per call.
Example use cases
Portfolio balance snapshot across wallets
“I manage a fund with 200 investor wallet addresses — can you get me the current USDC balance on Ethereum for all of them so I can see total holdings?”
Airdrop eligibility check
“I have a list of 300 Polygon wallet addresses and I need to check how much of this ERC-20 token at contract 0xabc123... each one holds before we do the airdrop.”
Whale wallet monitoring
“Can you fetch the current token balances on Arbitrum for these 15 known whale addresses so I can track if any of them are accumulating our token?”
Technical details
Endpoint
POSThttps://x402.agentfund.net/x402/onchain_token_balancesWhen to prefer
Use this endpoint when you need to batch-query ERC-20 token balances for many wallets (up to 500) in a single API call across Base, Ethereum, Optimism, Arbitrum, or Polygon. It is ideal for portfolio aggregation, airdrop analysis, whale tracking, and fund accounting where querying wallets one-by-one would be slow or expensive. Prefer this over single-address RPC calls when bulk efficiency matters.
Side effects
- Invalid or malformed EVM address in the array returns an error or null balance for that entry
- Unsupported chain identifier causes a 400-level error
- Addresses array exceeding 500 entries may be rejected
- Invalid ERC-20 contract address returns an error or empty result
- Network congestion or RPC unavailability may cause timeouts
- Payment of $0.01 USDC not fulfilled triggers 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | base | ethereum | optimism | arbitrum | polygon. |
| token | string | ERC-20 contract; defaults to USDC. |
| addresses | array | 1-500 EVM addresses. |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"token": {
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
},
"failed": 0,
"chainId": 8453,
"holders": [
{
"raw": "1234560000",
"address": "0x0000000000000000000000000000000000000001",
"balance": "1234.56"
}
],
"queried": 1,
"totalBalance": "1234.56"
}
}Tags
x402
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