# x402.fuchss.app x402 Quote Audit — Comparative Trust Score

> x402.fuchss.app x402 Quote Audit — Comparative Trust Score is a paid API for AI agents from x402.fuchss.app, paid per call via x402, $0.017624/call, status unknown (last checked 2026-09-15).

Probes and compares two x402 resource URLs, returning trust and reliability scores covering uptime, 402-envelope compliance, price history, and on-chain USDC settlement volume.

## Facts

- Endpoint: POST https://x402.fuchss.app/v1/x402-quote-audit
- Price: $0.017624/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-fuchss-app-x402-quote-audit-comparative-trust-score-d5ef6f82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V7LrwHfPY1K4r08anBIDY

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 x402-fuchss-app-x402-quote-audit-comparative-trust-score-d5ef6f82 -d '<json body>'
```

Example prompt: Compare the trust and reliability of these two x402 endpoints for me — https://api.example.com/weather and https://api.other.com/weather — and label the comparison 'weather API shootout' so I can see which one has better uptime, 402 compliance, and on-chain USDC settlement volume.

## When to prefer this

Use this endpoint when you need to directly compare two x402 endpoints head-to-head on trust, uptime, compliance, and settlement metrics — rather than just looking up a single endpoint's score or browsing the free top-25 leaderboard. Ideal for agents evaluating which of two competing x402 services to route traffic to.

## Known failure modes

- One or both resource URLs are not valid x402 endpoints — returns error or null scores for that resource
- Endpoint unreachable or times out during probing — partial results or probe failure indicated
- Venice model ID not found in catalog — falls back to cheapest default model or returns error
- Malformed input (missing resourceA or resourceB) — 400 validation error
- Payment of $0.017624 USDC not settled — 402 payment required response before results are returned

## How this service works

Trust & reliability scores for x402 endpoints. We monitor every listed x402 service 24/7 — uptime probes, 402-envelope compliance, price history, and real on-chain USDC settlement volume. Pay-per-call trust scores from $0.005; free top-25 leaderboard.

## Output

Returns a structured audit object comparing both x402 resource URLs across trust dimensions including uptime, 402-envelope compliance, historical pricing, and real on-chain USDC settlement volume, surfacing which endpoint is more reliable and trustworthy.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "resourceA",
  "resourceB"
 ],
 "properties": {
  "label": {
   "type": "string",
   "description": "Optional label for the comparison."
  },
  "model": {
   "type": "string",
   "description": "Optional Venice model id (default picks the cheapest catalog model satisfying the request)."
  },
  "resourceA": {
   "type": "string",
   "description": "First x402 resource URL to probe."
  },
  "resourceB": {
   "type": "string",
   "description": "Second x402 resource URL to probe."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-fuchss-app-x402-quote-audit-comparative-trust-score-d5ef6f82/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.fuchss.app](https://www.zero.xyz/host/x402.fuchss.app/llms.txt)