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Tollkit Chain Balance
x402
Tollkit Chain Balance is a paid API for AI agents from web.tollkit.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Returns native token and ERC-20/SPL token balances for a wallet or contract address on Base, Ethereum, or Solana.
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 a structured response with the native token balance (ETH, SOL, etc.) and balances for any requested ERC-20 or SPL token contracts associated with the queried address on the specified chain.
Example use cases
DeFi portfolio snapshot
“What's the current balance of 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe on Ethereum, including the USDT and USDC token balances?”
Solana wallet audit
“Check the SOL balance and all SPL token holdings for wallet 7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU on Solana.”
Smart contract treasury check
“Look up the ETH and WETH balance held by the contract at 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f on Ethereum.”
Technical details
Endpoint
POSThttps://web.tollkit.dev/chain/balance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call on-chain balance lookup without setting up an account or managing API keys — especially useful for one-off agent tasks on Base, Ethereum, or Solana where the x402 micropayment model fits. Prefer it over full blockchain indexers or account-based APIs when simplicity and low cost per call matter more than high-volume throughput.
Side effects
- Invalid address format returns a validation error
- Unsupported chain value causes rejection
- Requesting more than 20 token contracts is rejected
- Network/RPC errors may cause intermittent failures
- Unknown token contract addresses return zero balance
- Payment via x402 fails if wallet has insufficient USDC
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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