# Strale Contract Verify Check

> Strale Contract Verify Check is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-09-13).

Verifies and checks a smart contract address on a specified blockchain, returning audit and verification details.

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/contract-verify-check
- Price: $0.0216/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-contract-verify-check-d913efd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WJBrA26clhxTboZrYw7X3

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 strale-contract-verify-check-d913efd0
```

Example prompt: Can you check whether the smart contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 is verified on Ethereum mainnet (chain ID 1)?

## When to prefer this

Choose this endpoint when you need a fast, auditable, on-chain smart contract verification check with cryptographic audit trail support. Ideal for AI agents performing due diligence on DeFi contracts, token addresses, or any on-chain deployments across supported EVM chains. Prefer this over generic block explorer lookups when you need structured, machine-readable output with audit record hashing.

## Known failure modes

- Invalid contract address format (non-0x or wrong length) returns validation error
- Unrecognized chain ID returns unsupported chain error
- Contract exists on chain but is unverified returns unverified status
- Network timeout or RPC unavailability returns service error
- Contract address not found on specified chain returns not found error

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns the verification status of the smart contract including whether source code is verified, contract name, compiler details, and an audit record with a cryptographic chain hash for tamper-evident logging.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-contract-verify-check-d913efd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)