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skills.onesource.io Smart Contract Details
x402
skills.onesource.io Smart Contract Details is a paid API for AI agents from skills.onesource.io, paid per call via x402, $0.005000/call, status unknown (last checked 2026-10-09).
Returns on-chain details for a specific smart contract address, including token standards (ERC-20, ERC-721, ERC-1155), interfaces, and bytecode size.
Price / call$0.005000
Success—
StatusUnknown
How this service works
Returns on-chain details for a specific smart contract address.
Output
Returns a JSON object with the contract's name, symbol, address, boolean flags for ERC-20/ERC-165/ERC-721/ERC-1155 compliance, the list of supported interfaces, bytecode length, and a boolean confirming it is a contract. Also includes request metadata such as endpoint and request ID.
Example use cases
Example prompt
“Can you look up the on-chain details for the smart contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — I want to know if it's an ERC-721 or ERC-1155, and what its name and symbol are?”
Technical details
Endpoint
GEThttps://skills.onesource.io/api/chain/contract/0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly identify whether an Ethereum address is a smart contract, which token standards it implements (ERC-20, ERC-721, ERC-1155), and its on-chain name/symbol — especially across multiple EVM-compatible networks including Base, Avalanche, and MegaETH. Prefer this over general block explorers when you need structured, machine-readable contract metadata in an agent pipeline.
Side effects
- Invalid address format (not 0x + 40 hex chars) returns a 400 error
- Address is an EOA (externally owned account, not a contract) — is_contract returns false with minimal data
- Unsupported network value returns a validation error
- Contract not deployed on the specified network returns empty or null contract data
- Rate limiting or payment failure via x402 protocol returns 402 Payment Required
Input
{
"network": "ethereum"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| network | string | The blockchain network to query. The contract address is passed in the URL path, not the body. |
Output
{
"data": {
"name": "BoredApeYachtClub",
"symbol": "BAYC",
"address": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
"is_erc20": false,
"is_erc165": true,
"is_erc721": true,
"interfaces": [
"ERC165",
"ERC721"
],
"is_erc1155": false,
"code_length": 16791,
"is_contract": true
},
"meta": {
"endpoint": "/api/chain/contract/0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
"request_id": "f53c5afc915aa9f4"
}
}Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | object | |
| metarequired | object |
Tags
x402
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