# settle-check Trust Probe API

> settle-check Trust Probe API is a paid API for AI agents from settle-check.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Live-probes an x402 endpoint and returns a trust verdict with settlement evidence and a scored tier indicating whether the endpoint is actively settling payments.

## Facts

- Endpoint: GET https://settle-check.vercel.app/api/trust/probe
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/settle-check-trust-probe-api-0a01905e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gMTxjTCi9g1SlbqTSaEu7

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 settle-check-trust-probe-api-0a01905e
```

Example prompt: Can you probe that x402 endpoint at https://api.example.com/premium-data and tell me its trust verdict — is it live and actually settling payments?

## When to prefer this

Use this endpoint when you need to verify the liveness and settlement integrity of an x402 pay-per-call endpoint before spending money on it, listing it in a directory, or routing agent traffic to it. It is specifically designed for the x402 protocol ecosystem with Mogami/Base/USDC settlement evidence — prefer it over generic uptime monitors when payment settlement verification is the primary concern.

## Known failure modes

- Target URL is unreachable or returns non-402 response — may result in low score or error verdict
- Missing or malformed 'url' query parameter — likely returns 400 or schema validation error
- Target endpoint has expired or stale settlement evidence — lower trust score or non-live verdict
- Rate limiting or payment failure for the probe call itself ($0.001 USDC required)
- Mogami settlement network unavailability causing inconclusive verdict

## How this service works

Trust layer for x402 endpoints: live probe, settlement evidence, verdict tiers. USDC on Base, Mogami-settled.

## Output

Returns a JSON object containing a numeric trust score (e.g. 0–100) and a verdict string (e.g. 'live_settling') indicating whether the probed x402 endpoint is actively live and processing USDC settlements on Base via Mogami.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "description": "paid JSON result"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "score": 100,
  "verdict": "live_settling"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/settle-check-trust-probe-api-0a01905e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from settle-check.vercel.app](https://www.zero.xyz/host/settle-check.vercel.app/llms.txt)