# x402.fuchss.app Trust Score API

> x402.fuchss.app Trust Score API is a paid API for AI agents from x402.fuchss.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a 0-100 trust and reliability score for any x402 pay-per-call endpoint, based on 30-day uptime, compliance, latency, and on-chain settlement volume.

## Facts

- Endpoint: POST https://x402.fuchss.app/v1/x402-trust
- Price: $0.005/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-trust-score-api-0bebcc7e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-gTetbHMCq2dUerStGJyg

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-trust-score-api-0bebcc7e -d '<json body>'
```

Example prompt: Can you pull the trust score for https://api.example.com/v1/some-x402-endpoint and tell me the grade, uptime stats, and any compliance issues flagged over the past 30 days?

## When to prefer this

Use this endpoint when you need to evaluate whether a specific x402 pay-per-call API is trustworthy before integrating or paying for it — especially when you want objective, continuously monitored metrics like uptime, 402-envelope compliance, latency history, and real on-chain USDC settlement volume rather than self-reported claims.

## Known failure modes

- Unknown or unmonitored resource URL returns low confidence score or empty stats
- Malformed URL input returns validation error
- Service not yet listed in discovery returns insufficient observation data
- Network timeout if x402.fuchss.app monitoring backend is temporarily unavailable

## How this service works

Trust, reputation & 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. Free grade & recommendation for any endpoint, $0.005 for a full data breakdown.

## Output

Returns a JSON object with a 0-100 trust score, a letter grade (A/B/C/D/F), per-component subscores (uptime, compliance, latency, age, activity, stability), raw 30-day stats, a confidence value between 0 and 1, and a flags object with machine-readable issue slugs. The resource URL is echoed back for confirmation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "resource": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "flags": [],
  "grade": "A",
  "score": 87.4,
  "stats": {
   "payTo": "0xabc…123",
   "delisted": false,
   "probes30d": 1440,
   "probeOk30d": 1427,
   "avgLatencyMs": 312,
   "observedDays": 5,
   "settlements30d": 18234,
   "distinctPayers30d": 96,
   "settledVolumeUnits30d": "364680000"
  },
  "$schema": "https://x402.fuchss.app/schemas/x402-trust.schema.json",
  "resource": "https://api.example.com/v1/thing",
  "breakdown": {
   "uptime": 0.99,
   "latency": 0.91,
   "observedAge": 0.6,
   "priceStability": 1,
   "envelopeCompliance": 1,
   "settlementActivity": 0.74
  },
  "confidence": 0.82,
  "schemaType": "x402-trust",
  "description": "Provider-advertised description of the endpoint (unverified claim).",
  "serviceName": "Example Thing API",
  "schemaVersion": "1.0.0",
  "dataCompleteSince": 1748736000000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-fuchss-app-trust-score-api-0bebcc7e/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)