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Blockscout Smart Contract Lookup
x402
Blockscout Smart Contract Lookup is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Retrieves detailed verified smart contract information for a given contract address on a specified blockchain network
Price / call$0.002
Success—
StatusUnknown
How this service works
Access to api/v2/smart-contracts/:address_hash. Retrieve detailed information about a verified smart contract
Output
Returns detailed information about a verified smart contract including its name, source code, ABI, bytecode, compiler version and settings, constructor arguments, verification status, creation transaction hash, and associated metadata such as token information if applicable.
Example use cases
Audit DeFi protocol contract code
“I need to review the source code and ABI for the Uniswap V3 factory contract at 0x1F98431c8aD98523631AE4a59f267346ea31F984 on Ethereum mainnet — can you pull it up from Blockscout?”
Verify NFT contract deployment
“Can you check Blockscout and get the verified smart contract info for the contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum (chain ID 1)? I want to confirm the compiler version and whether it's verified.”
Cross-chain contract inspection on Polygon
“Look up the smart contract details on Blockscout for address 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon (chain ID 137) — I need the ABI and constructor arguments.”
Technical details
Endpoint
GEThttps://api.blockscout.com/:chain_id/api/v2/smart-contracts/:address_hash_paramWhen to prefer
Use this endpoint when you need verified smart contract source code, ABI, or compilation metadata for a specific contract address on an EVM-compatible chain indexed by Blockscout. Prefer it over Etherscan equivalents when working with chains that Blockscout indexes but Etherscan does not (e.g., many L2s and alt-EVMs), or when you need a pay-per-call model without API key registration.
Side effects
- Contract address not found or not deployed on the specified chain — returns 404
- Contract exists but is not verified — returns partial data or a not-verified status
- Invalid address format — returns 400 bad request
- Unsupported or unknown chain_id — returns error or empty response
- Rate limiting or payment failure — returns 402 or 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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