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Vextorium EVM Contract Read
x402
Vextorium EVM Contract Read is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-11).
Calls any read-only (view) function on an EVM smart contract by function signature and returns decoded results without signing or broadcasting a transaction.
Price / call$0.004
Success—
StatusUnknown
How this service works
Call any read-only (view) function of an EVM contract from its signature, e.g. balanceOf(address)(uint256), with arguments, and get the decoded result. Supports address, bool, intN/uintN, bytesN, string, bytes and arrays. Read-only: nothing is signed or sent.
Output
A JSON object containing the decoded return values as an array of strings, the network, contract address, function signature, 4-byte function selector, and the raw ABI-encoded hex response from the node.
Example use cases
Check ERC-20 token balance on-chain
“What's the USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the Base network? The USDC contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — call balanceOf(address)(uint256) with that address.”
Fetch NFT contract owner on Ethereum
“Who is the owner of the NFT contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13d on Ethereum? Call the owner()(address) view function and return the decoded address.”
Query DeFi protocol total supply on Arbitrum
“What's the total supply of the Aave aUSDC token at 0x625E7708f30cA75bfd92586e17077590C60eb4cD on Arbitrum? Use totalSupply()(uint256) to get the result.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/contract-read?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to read on-chain state from any EVM-compatible contract (Base, Ethereum, Arbitrum, Optimism, Polygon) using only the function signature — no ABI file, no wallet, no RPC node setup required. Ideal for agents that need to query token balances, NFT ownership, protocol state, or any view function in a single HTTP call without managing Web3 infrastructure.
Side effects
- Invalid function signature format returns a parsing error
- Contract address does not exist on the specified network returns an RPC error
- Wrong argument types or count cause ABI decoding failure
- Unsupported network name returns a validation error
- Non-view (state-changing) functions cannot be called and will fail
- Network RPC unavailability causes a timeout or upstream error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": [
"USD Coin"
],
"network": "base",
"contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"function": "name()",
"selector": "0x06fdde03",
"result_hex": "0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000855534420436f696e000000000000000000000000000000000000000000000000"
}
}Tags
x402
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