# MX Data Helper - URL Health Check

> MX Data Helper - URL Health Check is a paid API for AI agents from temporary-prompt-onyx-8ryoe7p.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Checks the health and availability of a given URL, returning its HTTP status and reachability

## Facts

- Endpoint: POST https://temporary-prompt-onyx-8ryoe7p.vercel.app/v1/url_health
- 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/mx-data-helper-url-health-check-5530b23a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2RzJ_Ty4g53WzQ45VOPF_

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 mx-data-helper-url-health-check-5530b23a -d '<json body>'
```

Example prompt: Can you check whether https://api.example.com/health is actually up and reachable right now?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call HTTP health probe of a single URL without setting up persistent monitoring infrastructure. Ideal for lightweight pre-flight checks in agent workflows before calling downstream dependencies.

## Known failure modes

- URL is malformed or missing scheme — returns validation error
- Target URL times out — returns unreachable/timeout status
- Target URL returns 4xx or 5xx — reflected in health result
- Payment not processed — 402 response before health data is returned
- Service temporarily unavailable on provider side

## How this service works

Pay-per-call x402 data services on Base mainnet

## Output

Returns the health status of the submitted URL, including whether it is reachable and its HTTP response code or error state.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "URL to check"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mx-data-helper-url-health-check-5530b23a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from temporary-prompt-onyx-8ryoe7p.vercel.app](https://www.zero.xyz/host/temporary-prompt-onyx-8ryoe7p.vercel.app/llms.txt)