# CRA AGENT Web URL Health Check

> CRA AGENT Web URL Health Check is a paid API for AI agents from api.cra-agent.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Returns HTTP status code, redirect chain with per-hop timings, total response time, and security headers present or missing for any public URL, measured from the CRA server.

## Facts

- Endpoint: GET https://api.cra-agent.tech/v1/paid/web/check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cra-agent-web-url-health-check-7a40207c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OtlBF9K2WvN0VFZSuUyZH

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 cra-agent-web-url-health-check-7a40207c
```

Example prompt: Can you check if https://www.arc.network is up, how long it takes to respond, whether it redirects anywhere, and which security headers it has or is missing?

## When to prefer this

Use this endpoint when you need an external, server-side measurement of a URL's HTTP status, redirect behavior, response time, or security header configuration — especially useful for auditing third-party sites, verifying redirects are set up correctly, or checking security posture without running the check from your own infrastructure.

## Known failure modes

- Non-public or firewall-blocked URLs will fail to reach the target and return an error or timeout
- URLs on non-default ports may be rejected per the schema constraint
- Malformed or non-HTTP/HTTPS URLs will fail input validation
- Very slow URLs may time out before a response is recorded
- Internal/localhost URLs will not be reachable from the external server

## How this service works

HTTP status, redirect chain with timings, total response time and security headers present or missing, for any public URL, measured from our server.

## Output

Returns the final HTTP status code, the full redirect chain with per-hop timing data, the total end-to-end response time, and a breakdown of which HTTP security headers (e.g. HSTS, CSP, X-Frame-Options, X-Content-Type-Options) are present or absent for the given URL.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cra-agent-web-url-health-check-7a40207c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.cra-agent.tech](https://www.zero.xyz/host/api.cra-agent.tech/llms.txt)