# agent-audit Link Health & Quote Verifier

> agent-audit Link Health & Quote Verifier is a paid API for AI agents from agent-audit.agent-audit.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Checks up to 25 URLs for HTTP health status and x402 seller quote validity in a single read-only auditing call, billed per call in USDC on Base.

## Facts

- Endpoint: POST https://agent-audit.agent-audit.workers.dev/v1/links?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-audit-link-health-quote-verifier-12212378
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rAfQrKIvDOiImfiwgKhtF

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 agent-audit-link-health-quote-verifier-12212378 -d '<json body>'
```

Example prompt: Can you check the health of these five x402 seller links and tell me if any are broken or returning bad status codes: https://api1.example.com/sell, https://api2.example.com/sell, https://api3.example.com/sell, https://api4.example.com/sell, https://api5.example.com/sell?

## When to prefer this

Choose this endpoint when you need to bulk-verify the reachability and x402 quote integrity of up to 25 seller URLs in a single call. It is purpose-built for the x402 pay-per-call ecosystem, making it the right choice over generic HTTP ping tools when you specifically care about x402 payment endpoint health. Prefer it for pre-publication audits, routine monitoring of x402 listings, or validating third-party seller links before integrating them into an agent workflow.

## Known failure modes

- Submitting more than 25 URLs returns a validation error
- Malformed URLs in the array may cause individual result errors or skipped entries
- Downstream endpoint timeouts may produce non-200 status verdicts for healthy-but-slow services
- Payment failure (insufficient USDC balance on Base) prevents the call from executing
- Network errors reaching the Cloudflare Worker return HTTP 5xx

## How this service works

Read-only x402 seller audit, link health and quote verification. Pay per call in USDC on Base via x402.

## Output

Returns a JSON array of results, one per submitted URL, each containing the original URL, its HTTP status code, and a verdict string (e.g. 'ok') indicating whether the link is healthy and the x402 quote is valid.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "urls": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 25
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "url": "https://example.com/",
    "status": 200,
    "verdict": "ok"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-audit-link-health-quote-verifier-12212378/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-audit.agent-audit.workers.dev](https://www.zero.xyz/host/agent-audit.agent-audit.workers.dev/llms.txt)