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EVM Address Contract vs EOA Checker
x402
EVM Address Contract vs EOA Checker is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Checks whether an Ethereum-compatible address is a smart contract or an externally owned account (EOA) on Base, Ethereum, Arbitrum, Optimism, Polygon, or BNB Chain, returning is_contract flag, deployed bytecode size, and keccak256 code hash.
Price / call$0.003
Success—
StatusUnknown
How this service works
Is an address a contract or an EOA on Base, Ethereum, Arbitrum, Optimism, Polygon or BNB (default Base)? Returns is_contract, deployed code size in bytes, and the keccak256 code hash (eth_getCode).
Output
Returns a JSON object with: is_contract (boolean indicating whether the address has deployed bytecode), the size of the deployed code in bytes, and the keccak256 hash of the bytecode (from eth_getCode). EOAs return false with zero bytes.
Example use cases
Example prompt
“Is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 a smart contract or a regular wallet on Ethereum? And what's its code size and code hash?”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/codeWhen to prefer
Use this endpoint when you need to classify an EVM address as a smart contract or EOA across multiple chains (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB), especially when you need the exact bytecode size or code hash for further analysis. Prefer this over block explorers when you need a programmatic, paid API response with structured output for agent workflows.
Side effects
- Invalid address format (not a 0x hex address) returns an error
- Unsupported network value returns a validation error
- Address not found on the specified network may return is_contract=false with 0 bytes
- Network RPC node unavailability may cause a 500 or timeout
- Payment not included or insufficient USDC triggers 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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