# numberintel.dev x402 Shop Checkup

> numberintel.dev x402 Shop Checkup is a paid API for AI agents from numberintel.dev, paid per call via x402, $1/call, status unknown (last checked 2026-10-19).

Audits any x402-enabled seller endpoint end-to-end — probing plain GET behavior, 402 envelope structure, sample inputs, discovery files, and CDP Bazaar freshness — and returns a graded report with actionable fixes.

## Facts

- Endpoint: GET https://numberintel.dev/v1/shop-check?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numberintel-dev-x402-shop-checkup-dccf6de5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tA7d8qy36Y9fyUS6jIzST

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 numberintel-dev-x402-shop-checkup-dccf6de5
```

Example prompt: Run a full checkup on my x402 shop at https://myshop.example.com and tell me everything that's misconfigured — how paying agents, uptime raters, and the CDP Bazaar currently see it, with a fix for each issue found.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-perspective audit of an x402 seller endpoint rather than a single focused check. It combines uptime probe, 402 envelope lint, Bazaar freshness, and discovery file validation in one call — ideal for pre-launch validation or diagnosing why an x402 shop is underperforming. Use the sibling conformance-preflight endpoint if you only need 402 envelope linting, or the settlement attestation endpoint if you need proof of a real purchase.

## Known failure modes

- Target URL is unreachable or returns non-HTTP errors — probe cannot complete
- Target is not an x402 endpoint — report may flag all checks as failing
- URL is malformed or missing HTTPS scheme — request rejected
- Rate limiting or firewall on target blocks probes — partial results returned
- Bazaar has no record of the shop — freshness check returns not-found

## How this service works

x402 shop checkup: audits any x402 seller the way uptime raters, index crawlers, paying agents and the CDP Bazaar see it (plain-GET probes, 402 envelopes, sample inputs, discovery files, Bazaar freshness) and returns a graded report with a fix for every finding. Read-only, nothing is purchased.

## Output

A graded audit report covering: plain-GET probe results, 402 envelope structure and conformance, sample input handling, discovery file presence and correctness, CDP Bazaar freshness status, and a prioritized list of findings each paired with a concrete remediation step. No actual purchase is made.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "https URL of the x402 shop (origin or one endpoint)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numberintel-dev-x402-shop-checkup-dccf6de5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numberintel.dev](https://www.zero.xyz/host/numberintel.dev/llms.txt)