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Vextorium Smart Contract Verification Checker
x402
Vextorium Smart Contract Verification Checker is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-01).
Checks whether a smart contract's source code is verified on Sourcify for any EVM chain, returning match type, contract name, compiler, function list, and verification date.
Price / call$0.004
Success—
StatusUnknown
How this service works
Checks whether a smart contract's source code is verified and public on Sourcify, on any EVM chain: match type, contract name, compiler, number of functions and a sample. Verified code = transparent and auditable (not a safety guarantee). Live from Sourcify.
Output
Returns a JSON object with: verified (boolean), match type (exact/partial), contract name, compiler version, number of functions, a sample list of function names, verification date, chain name, chain ID, contract address, and a source/note field linking back to Sourcify.
Example use cases
DeFi protocol transparency audit
“Before I invest in this protocol, can you check if the contract at 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9 on Ethereum is source-verified on Sourcify, and tell me its name, match type, and how many functions it has?”
NFT contract verification check
“I found an NFT collection and want to make sure the contract is legit — can you verify whether 0x23581767a106ae21c074b2276D25e5C3e136a68b on Ethereum has its source code publicly verified on Sourcify?”
Multi-chain contract audit prep
“We're auditing a contract deployed on Base at address 0x4200000000000000000000000000000000000006 — can you pull its Sourcify verification status, the compiler version used, and a sample of its functions?”
Technical details
Endpoint
POSThttps://api.vextorium.com/contrato-verificado-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to confirm whether a smart contract's source code is publicly available and verified on Sourcify across any EVM-compatible chain. It's ideal for transparency checks before interacting with a DeFi protocol, auditing a contract, or surfacing readable function names. Prefer it over block explorer APIs when you want a single unified check across multiple chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, etc.) with structured output including compiler and function metadata.
Side effects
- Contract address not found on Sourcify — returns verified: false with null fields
- Invalid or unsupported chain identifier — may return error or unrecognized chain response
- Malformed contract address (non-0x format) — validation error
- Contract exists on-chain but source was never submitted to Sourcify — returns unverified result
- Network timeout reaching Sourcify API — upstream latency error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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