# x402 Agent Suite Pro – Quality Monitor Probe

> x402 Agent Suite Pro – Quality Monitor Probe is a paid API for AI agents from x402-agent-suite-production.up.railway.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Probes an HTTP endpoint's quality and reachability using a GET, HEAD, or DELETE request, returning whether the target is accessible and allowed after x402 payment settlement.

## Facts

- Endpoint: POST https://x402-agent-suite-production.up.railway.app/api/quality-monitor/probe?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-agent-suite-pro-quality-monitor-probe-a7c0b699
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LvU3x1lKdQxOcv-9vdZ0t

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-agent-suite-pro-quality-monitor-probe-a7c0b699 -d '<json body>'
```

Example prompt: Can you probe this HTTP endpoint using a GET request to check if it's reachable and allowed — I need to know its quality status before routing my agent fleet through it.

## When to prefer this

Use this endpoint when you need a paid, authenticated quality check on an HTTP endpoint (GET, HEAD, or DELETE) as part of an x402-enabled agent fleet infrastructure. Prefer this over generic uptime monitors when you need the x402 payment layer and structured ok/allowed/summary response for downstream agent decision-making.

## Known failure modes

- Payment not settled — returns 402 with x402 payment required header
- Invalid HTTP method provided (only GET, HEAD, DELETE accepted) — validation error
- Target endpoint unreachable — ok: false, allowed: false with summary explaining failure
- Missing required 'input' field — schema validation error
- Network timeout on probe — ok: false with timeout summary

## How this service works

24 paid x402 infrastructure APIs for AI agent fleets: buy advisor, audition coach, guard, proxy, MPP, attestations, and pipeline orchestration.

## Output

Returns a JSON object with three fields: 'ok' (boolean indicating success), 'allowed' (boolean indicating whether access is permitted), and 'summary' (a human-readable string describing the probe outcome after x402 payment settlement).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "allowed",
      "summary"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "allowed": {
       "type": "boolean"
      },
      "summary": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "allowed": true,
  "summary": "Paid response after x402 settlement"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-agent-suite-pro-quality-monitor-probe-a7c0b699/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent-suite-production.up.railway.app](https://www.zero.xyz/host/x402-agent-suite-production.up.railway.app/llms.txt)