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eth_call Read-Only EVM Contract Call
x402
eth_call Read-Only EVM Contract Call is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Executes a read-only (view/pure) smart contract call on Ethereum, Base, Arc, or BNB Chain and returns the raw result
Price / call$0.001
Success—
StatusUnknown
How this service works
Free APEX on X1, and free USDC plus APEX on Arc, three times a day. No gas, no sign-up. Plus a swap, a screener, APEX City and token checks.
Output
A JSON object with 'ok' boolean, and a 'data' object containing: 'ok' status, 'to' (contract address), 'block' (block number), 'chain' (network name), 'result' (raw hex return value), 'reverted' (boolean indicating if the call reverted), and 'blockTime' (ISO timestamp of the block). Also includes 'paid' showing the USDC amount charged (0.001).
Example use cases
Check ERC-20 token balance on-chain
“Read the USDC balance of address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 by calling balanceOf on the USDC contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum — give me the raw result.”
Query DeFi pool reserves on Base
“Call getReserves on the Uniswap V2 pair contract 0x4C36388bE6F416A29C8d8Eee81C771cE6bE14B18 on Base with calldata 0x0902f1ac so I can see the current liquidity pool reserves.”
Verify NFT ownership via contract call
“Check who owns token ID 1 on the NFT contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — use ownerOf with the appropriate calldata and return the raw hex address.”
Technical details
Endpoint
GEThttps://apexfaucet.xyz/api/x402/evm-call?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to read on-chain contract state across Ethereum, Base, Arc, or BNB Chain without running your own node or paying gas. It is ideal for agents that need to query ERC-20 balances, DeFi reserves, NFT ownership, or any other view/pure Solidity function. Prefer it over a full Web3 provider integration when you want a simple pay-per-call REST interface. Not appropriate for state-changing transactions — this is strictly read-only.
Side effects
- Invalid contract address format returns validation error
- Malformed or too-short calldata hex rejected by schema pattern
- Contract call reverts — returned with reverted:true and empty result
- Unsupported chain value (not ethereum/base/arc/bnb) causes request rejection
- Contract does not exist at the specified address on the chosen chain
- Payment of 0.001 USDC not completed — x402 payment required error
- RPC node timeout or network congestion causes delayed or failed response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"data": {
"type": "object"
},
"paid": {
"type": "number"
}
}
},
"example": {
"ok": true,
"data": {
"ok": true,
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"block": 52559424,
"chain": "base",
"result": "0x0000000000000000000000000000000000000000000000000000000000000006",
"reverted": false,
"blockTime": "2026-10-13T16:16:35.000Z"
},
"paid": 0.001
}
}Tags
x402
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