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NexusAPI Crypto Contract Verifier
x402
NexusAPI Crypto Contract Verifier is a paid API for AI agents from nexus-api-peach-nine.vercel.app, paid per call via x402, $0.109163/call, status unknown (last checked 2026-09-13).
Verifies and validates smart contract code or address authenticity on a blockchain network
Price / call$0.109163
Success—
StatusUnknown
How this service works
Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.
Output
Returns verification status of the smart contract, including whether the contract source code has been verified, contract metadata, and authenticity signals derived from on-chain data.
Example use cases
DeFi protocol integration safety check
“Before I connect our app to this new protocol, can you verify if the smart contract at 0x1111111254fb6c44bac0bed2854e76f90643097d is actually legitimate and has verified source code on-chain?”
User protection against fake token contracts
“A user wants to trade this token but I'm not sure if it's real. Can you check if this contract address 0x6B175474E89094C44Da98b954EedeAC495271d0F is verified and authentic on Ethereum?”
Bytecode audit before transaction execution
“I'm about to execute a transaction on this smart contract but want to make sure it's safe. Can you validate that the contract at 0xdAC17F958D2ee523a2206206994597C13D831ec7 matches its published source code and is verified?”
Technical details
Endpoint
POSThttps://nexus-api-peach-nine.vercel.app/api/crypto/contract/verifyWhen to prefer
Use this endpoint when an AI agent needs to confirm whether a smart contract address is verified and legitimate before executing transactions, integrating a DeFi protocol, or advising a user on contract safety. Prefer this over general blockchain explorers when a pay-per-call, no-API-key approach is needed.
Side effects
- Invalid or malformed contract address returns error
- Contract not found on specified network
- Blockchain network unavailable or rate-limited
- Query string missing or empty returns 400-level error
- Unverified contract returns negative/null verification result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string | Search query or input parameter |
Output
Schema · Response
{
"type": "object",
"description": "API response data"
}Tags
x402
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