# Sift Web Tools – Site Check

> Sift Web Tools – Site Check is a paid API for AI agents from sift.srv1996466.hstgr.cloud, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-23).

Checks a domain's TLS certificate validity, HTTP security headers, and general site health in one call

## Facts

- Endpoint: GET https://sift.srv1996466.hstgr.cloud/v1/site-check?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sift-web-tools-site-check-ba6c2e2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9LNzLlF_b3yuoDhXh7DqB

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 sift-web-tools-site-check-ba6c2e2a
```

Example prompt: Can you run a site health check on stripe.com and tell me if the TLS certificate is valid, how many days are left on it, and what security header score it gets?

## When to prefer this

Use this endpoint when you need a quick, structured check of a domain's TLS certificate status and HTTP security headers without doing a full audit. Ideal for pre-outreach checks, vendor evaluations, or certificate expiry monitoring. Prefer it over full WHOIS or crawl endpoints when you only need security posture signals.

## Known failure modes

- Invalid or non-existent domain returns an error or empty result
- Domain with no HTTP server returns connection failure
- Payment not processed (non-200) means no charge but also no result
- Rate limiting or network timeouts on slow-responding domains

## How this service works

Domain health: DNS, SPF/DMARC, TLS certificate expiry, security headers. One-call domain audit: A/AAAA/MX/NS/CAA records, SPF and DMARC, TLS issuer and days to expiry, redirect chain and security-header score.

## Output

Returns a JSON object with TLS validity (boolean) and days remaining on the certificate, an HTTP security header score (e.g. '2/6'), and the checked domain name. Provides a quick snapshot of a site's basic security posture.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain, e.g. example.com"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tls": {
   "valid": true,
   "days_left": 80
  },
  "http": {
   "security_header_score": "2/6"
  },
  "domain": "example.com"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sift-web-tools-site-check-ba6c2e2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sift.srv1996466.hstgr.cloud](https://www.zero.xyz/host/sift.srv1996466.hstgr.cloud/llms.txt)