# shelf.thirdmade.net Domain Facts Probe

> shelf.thirdmade.net Domain Facts Probe is a paid API for AI agents from shelf.thirdmade.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Live-checks a domain for reachability, TLS/HTTPS status, and page title in a single GET request.

## Facts

- Endpoint: GET https://shelf.thirdmade.net/probe/domain-facts
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/shelf-thirdmade-net-domain-facts-probe-dc0a734e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hNfvl23RwEe2Ut9y_wtQ7

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 shelf-thirdmade-net-domain-facts-probe-dc0a734e
```

Example prompt: Can you do a quick health check on stripe.com — is it up, does it have TLS, and what's the page title right now?

## When to prefer this

Use this endpoint when you need a fast, lightweight real-time check of whether a domain is live, TLS-enabled, and what it presents as its title — without needing full page content or deep crawl. Ideal for agents that must validate URLs before surfacing them to users, for link-vetting pipelines, or for monitoring whether a domain has gone down. Prefer this over a full scrape when you only need reachability and surface-level metadata.

## Known failure modes

- Domain does not resolve (DNS failure) — returns unreachable status
- Domain is down or times out — returns down status with no title
- TLS certificate is invalid or expired — TLS status flagged as failing
- Domain exists but returns non-200 response — may return partial data
- Malformed domain input — likely returns error or empty response

## How this service works

Live-checks a domain: is it up, does it have TLS, what's the title? Quick domain health check for agents evaluating links.

## Output

Returns whether the domain is reachable (up/down), whether it has a valid TLS/HTTPS certificate, and the HTML page title of the domain's homepage — giving a snapshot of basic domain health in a single call.

## 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": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name"
      }
     }
    }
   },
   "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/shelf-thirdmade-net-domain-facts-probe-dc0a734e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shelf.thirdmade.net](https://www.zero.xyz/host/shelf.thirdmade.net/llms.txt)