# Revenue Swarm x402 Seller Fix Auditor

> Revenue Swarm x402 Seller Fix Auditor is a paid API for AI agents from eu-tender-x402-v2-production.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Audits an x402-enabled API seller endpoint for correctness, returning a scored verdict with detailed findings on what passes or fails.

## Facts

- Endpoint: POST https://eu-tender-x402-v2-production.up.railway.app/api/x402-seller-fix?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/revenue-swarm-x402-seller-fix-auditor-e8625cbe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_stXaVBlUhX_tHHVGekHx_

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 revenue-swarm-x402-seller-fix-auditor-e8625cbe -d '<json body>'
```

Example prompt: Can you audit my x402 seller endpoint at https://myapi.example.com/paid-endpoint using a GET request and tell me if it's ready, needs fixes, or is broken — and list exactly what checks failed?

## When to prefer this

Use this endpoint when you need to programmatically verify that an x402-enabled seller API is correctly implemented before deployment or integration. It is the right choice when you want a machine-readable readiness verdict with actionable fix suggestions, especially for APIs monetized with USDC on Base via the x402 protocol. Prefer this over manual testing when you need a scored, structured report covering multiple compliance checks at once.

## Known failure modes

- Target URL is unreachable or returns a network error — audit cannot proceed
- Invalid or malformed URL provided — request rejected
- Target endpoint does not implement x402 at all — audit will return 'broken' verdict with critical failures
- Missing required 'url' field — returns 400 error
- Target endpoint times out during audit — inconclusive result
- x402 payment for the audit call itself fails — endpoint not reached

## How this service works

Pay-per-call B2B sales lead and procurement intelligence plus Base wallet data for agents. Search EU tenders/RFPs or inspect a Base wallet. Payments use x402 USDC on Base.

## Output

Returns a structured audit report including: product name, the audited URL, HTTP method used, an integer score (0–100), a verdict of 'ready', 'needs-fixes', or 'broken', a summary of total checks run with pass/fail counts and critical failures, a detailed findings array (each with id, severity, pass/fail flag, message, fix suggestion, and evidence), an observed data object, and a generated_at timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Public x402 endpoint to diagnose"
  },
  "body": {
   "description": "Optional JSON body for non-GET probes"
  },
  "method": {
   "type": "string",
   "default": "GET",
   "description": "HTTP method"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "score": 88,
  "method": "GET",
  "product": "x402 Seller Fix",
  "summary": {
   "checks": 10,
   "failed": 2,
   "passed": 8,
   "critical_failed": 0
  },
  "verdict": "needs-fixes",
  "findings": [
   {
    "id": "openapi",
    "fix": "Publish /openapi.json",
    "pass": false
   }
  ],
  "observed": {
   "http_status": 402,
   "x402_version": 2,
   "accepts_count": 1
  },
  "audited_url": "https://api.example.com/paid"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/revenue-swarm-x402-seller-fix-auditor-e8625cbe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from eu-tender-x402-v2-production.up.railway.app](https://www.zero.xyz/host/eu-tender-x402-v2-production.up.railway.app/llms.txt)