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Tollex Chain Contract Read
x402
Tollex Chain Contract Read is a paid API for AI agents from api.tollex.org, paid per call via x402, $0.0079/call, status unknown (last checked 2026-10-11).
Reads a view or pure function from an on-chain smart contract by calling it with specified arguments and returning the result.
Price / call$0.0079
Success—
StatusUnknown
How this service works
Tollex lets software agents buy APIs and tools under rules you set: it finds a capability that fits, checks your policy before anything is signed, pays with x402 in USDC on Base or USDG on Robinhood Chain, reconciles uncertain payments and returns a signed receipt.
Output
Returns the decoded return value of the specified smart contract view or pure function, along with a signed receipt confirming the call was made and paid for via x402 in USDC on Base or USDG on Robinhood Chain.
Example use cases
Check ERC-20 token balance on-chain
“What is the USDC balance for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the USDC contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48? Use the balanceOf(address) view returns (uint256) function.”
Query DeFi protocol lending rate
“Call the getReserveData function on the Aave lending pool at 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9 with argument 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — it's a view function that returns a tuple. I want to see the current borrow rate for USDC.”
Verify NFT ownership from contract
“Can you check who owns token ID 42 on the Bored Ape Yacht Club contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D? The function is ownerOf(uint256) view returns (address).”
Technical details
Endpoint
POSThttps://api.tollex.org/tools/chain_contract_read?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to read state from a deployed smart contract on Base or Robinhood Chain without writing to the chain. It is ideal for querying ERC-20 balances, NFT ownership, DeFi protocol parameters, or any other view/pure function. Prefer this over general-purpose RPC calls when you want automatic policy-gated payment handling and a signed receipt for auditing.
Side effects
- Invalid contract address format (must be 0x-prefixed 40 hex chars) returns a validation error
- Malformed function signature not matching the required pattern returns a schema rejection
- Contract does not exist at the given address or the function reverts on-chain
- Too many arguments provided (max 10) triggers input validation failure
- Network congestion or RPC unavailability causes a timeout
- Payment reconciliation failure if the x402 USDC payment cannot be confirmed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| args | array | |
| address | string | |
| signature | string |
Output
Schema · Response
{
"type": "json",
"example": {
"tool": {
"id": "chain_contract_read",
"version": "1.0.0",
"provider": "tollex.robinhood-chain"
},
"result": {
"result": "1000000000"
},
"evidence": [],
"untrustedOutput": false
}
}Tags
x402
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