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VexQuill Contract Audit API
x402
VexQuill Contract Audit API is a paid API for AI agents from x402-audit-api.vexquill.deno.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).
Performs automated static security analysis of a Solidity smart contract on Base by contract address, returning findings and a risk score.
Price / call$0.005
Success—
StatusUnknown
How this service works
Automated static security analysis of Solidity smart contracts. Pay $0.005 USDC on Base per audit via x402. No signup, no API key.
Output
Returns a JSON object containing the target contract address, an array of security findings (each describing a potential vulnerability), a risk score (numeric), and the timestamp of the audit. The findings array details any detected issues such as reentrancy, integer overflows, or access control problems.
Example use cases
Pre-interaction contract safety check
“Before I approve any tokens to this DeFi protocol on Base at 0xabc123def456abc123def456abc123def456abc1, can you audit the contract and flag any high-risk findings?”
New token contract due diligence
“Someone just launched a token at 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef on Base — can you scan the contract for rug pull mechanics or security holes before I buy in?”
Developer pre-deployment review
“I just deployed my Solidity contract to Base at 0x9999aaaa8888bbbb7777cccc6666dddd5555eeee and want to catch any security issues before I announce it — can you run a static audit and give me the risk score?”
Technical details
Endpoint
GEThttps://x402-audit-api.vexquill.deno.net/scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, no-signup, pay-per-use static security audit of a Solidity contract deployed on Base with verified source on Sourcify. Ideal for agents that need on-demand contract risk scoring without managing API keys or subscriptions. Best for single-contract lookups rather than bulk audits.
Side effects
- Contract address not found or not verified on Sourcify — audit cannot proceed without verified source code
- Invalid or malformed address format — must be a valid 0x-prefixed Ethereum/Base address
- Payment failure via x402 — audit not performed if USDC payment on Base does not go through
- Contract on a network other than Base — only Base-deployed contracts with Sourcify verification are supported
- Service downtime or Deno hosting errors — may return 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| addressrequired | string | Base contract address (0x...) with verified source on Sourcify. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| target | string | |
| findings | array | |
| auditedAt | string | |
| riskScore | number |
Tags
x402
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