# PapaCasper Domain Health Check

> PapaCasper Domain Health Check is a paid API for AI agents from papacasper.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Checks the health of a given domain, including robots.txt, sitemap, and SEO-related signals.

## Facts

- Endpoint: POST https://papacasper.com/mcp/pay/domain_health_check
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/papacasper-domain-health-check-c6b69a6f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j3RswP-Sb66ZdATRO9xeg

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 papacasper-domain-health-check-c6b69a6f -d '<json body>'
```

Example prompt: Can you run a domain health check on example.com and tell me if there are any issues with robots.txt, the sitemap, or SEO configuration?

## When to prefer this

Choose this endpoint when you need a quick, per-domain health snapshot covering robots.txt, sitemap, and SEO configuration signals. It is especially useful for pre-launch audits, diagnosing crawlability issues, or monitoring whether a domain's technical SEO setup is intact — without needing a full crawl or page-by-page analysis.

## Known failure modes

- Domain does not exist or is unreachable — report may indicate connection errors
- Domain has no robots.txt or sitemap, returned as absent rather than errored
- Malformed domain input (e.g. includes scheme or path) may cause validation errors
- Private or rate-limited domains may return incomplete data

## How this service works

A hosted MCP server exposing utility tools any AI agent can call over HTTP — page-to-markdown, SEO audits, robots/sitemap checks, and more.

## Output

A structured report on the health of the given domain, including the status of robots.txt, sitemap presence and accessibility, and SEO-relevant signals or issues found.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "description": "Bare domain to check, e.g. example.com (no scheme/path)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/papacasper-domain-health-check-c6b69a6f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from papacasper.com](https://www.zero.xyz/host/papacasper.com/llms.txt)