# NexusSDR AI x402 Audit

> NexusSDR AI x402 Audit is a paid API for AI agents from nexussdr-ai.run402.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Audits a target URL or domain for x402 payment protocol compliance and API metadata

## Facts

- Endpoint: GET https://nexussdr-ai.run402.com/api/x402-audit?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/nexussdr-ai-x402-audit-a0940c99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-Zbrw1XI2ihHuMO1PSxgl

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 nexussdr-ai-x402-audit-a0940c99
```

Example prompt: Can you audit https://example.com to check whether it supports the x402 payment protocol and pull out any relevant API metadata?

## When to prefer this

Use this endpoint when you need to programmatically verify whether a specific URL or domain has implemented the x402 payment protocol, especially when building tooling to map the x402 ecosystem, validate your own integration, or research competitors' payment infrastructure. It is not suited for full web crawls, content scraping, or non-x402 compliance checks.

## Known failure modes

- Invalid or non-HTTPS URL returns an error
- Target domain unreachable or times out
- No x402 signals detected on an otherwise valid domain
- Malformed input schema causes 400 error
- Payment of $0.01 USDC required per call; missing payment returns 402

## How this service works

Real-time server-side B2B buying-intent signal extraction and 3-touch hyper-personalized outbound sequence engine backed by PostgreSQL, Node 22 Serverless, TON Connect 2.0, and x402 API.

## Output

Returns an audit report for the submitted URL or domain indicating x402 protocol compliance status, detected payment headers, API endpoint metadata, and any relevant signals about the site's payment integration readiness.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Target HTTPS URL or domain to audit"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexussdr-ai-x402-audit-a0940c99/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexussdr-ai.run402.com](https://www.zero.xyz/host/nexussdr-ai.run402.com/llms.txt)