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Tollkit Chain Balance
x402
Tollkit Chain Balance is a paid API for AI agents from data.tollkit.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Returns the native token and ERC-20/SPL token balances for a given wallet or contract address on Base, Ethereum, or Solana, paid per-call via x402 in USDC.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call product page extraction. No account, no API key: pay in-band with x402 in USDC on Base or Solana.
Output
Returns the native token balance and any requested ERC-20 or SPL token balances for the queried address on the specified chain. Typically includes token amounts, decimals, and contract/mint identifiers for each asset.
Example use cases
DeFi portfolio snapshot
“What's the native ETH balance and DAI holdings (contract 0x6B175474E89094C44Da98b954EedeAC495271d0F) for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum?”
Solana wallet token check
“Can you look up the SOL balance and SPL token balance for mint EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v on Solana wallet 9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM?”
Base address funding verification
“Check whether address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e has any USDC on Base — include the contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 in the token list.”
Technical details
Endpoint
POSThttps://data.tollkit.dev/chain/balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need on-chain balance data for a wallet or contract without registering an API key — ideal for agent workflows where pay-per-call x402 micropayments are preferred over subscription billing. Best for quick, single-address balance lookups across Base, Ethereum, or Solana with optional multi-token support.
Side effects
- Invalid or malformed wallet address returns a validation error
- Unsupported chain value (outside base/ethereum/solana enum) causes a 400 error
- Invalid ERC-20 contract or SPL mint address in tokens array causes partial or failed lookup
- Payment failure via x402 (insufficient USDC, wrong chain) causes a 402 Payment Required response
- Rate-limiting or node unavailability may cause transient 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Which chain to read: "base" (default), "ethereum" or "solana". |
| tokens | array | Extra ERC-20 contracts (or SPL mints on Solana) to include. |
| address | string | Wallet (or contract) address to check. |
Tags
x402
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