# NexusAPI Crypto Contract Verifier

> NexusAPI Crypto Contract Verifier is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.059076/call, status unknown (last checked 2026-09-15).

Verifies smart contract details or legitimacy on a blockchain given a contract address or identifier

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/crypto/contract/verify
- Price: $0.059076/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-crypto-contract-verifier-3a2182c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZzRS3lAsi0zBtLohXwrtH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nexusapi-crypto-contract-verifier-3a2182c6 -d '<json body>'
```

Example prompt: Can you verify whether the smart contract at address 0x1234567890abcdef1234567890abcdef12345678 is legitimate and verified on-chain before I interact with it?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call contract verification without managing API keys, especially useful for AI agents operating autonomously in Web3 workflows that need to validate contract legitimacy before executing transactions.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract not found on the queried chain returns empty or null result
- Network timeouts if blockchain node is unresponsive
- Unverified contracts may return partial data without source code confirmation
- Rate limiting or payment failure via x402 protocol

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns verification status and metadata about the queried smart contract, including whether the contract is verified, any flags indicating legitimacy or risk, and relevant contract details such as source code verification status or audit information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexusapi-crypto-contract-verifier-3a2182c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-virid.vercel.app](https://www.zero.xyz/host/nexus-api-virid.vercel.app/llms.txt)