# SiteSignal TLS Security Evidence

> SiteSignal TLS Security Evidence is a paid API for AI agents from phases-prot-shine-royal.trycloudflare.com, paid per call via x402, $0.03/call, status down (last checked 2026-09-16).

Inspects a public HTTPS hostname's TLS certificate details and observable response security headers without active scanning.

## Facts

- Endpoint: GET https://phases-prot-shine-royal.trycloudflare.com/x402/tls-security
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-tls-security-evidence-3cfe1cf0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xxGiMMuWfgdiKUZW5ClFr

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 sitesignal-tls-security-evidence-3cfe1cf0
```

Example prompt: Can you pull the TLS certificate details and security headers for api.stripe.com so I can see what cipher suites and response security headers they're using?

## When to prefer this

Choose this endpoint when you need a passive, non-intrusive read of a public HTTPS domain's TLS certificate properties and security response headers without triggering active scans or port sweeps. Ideal for due diligence, compliance snapshots, or pre-integration security checks where you want structured evidence without touching the target aggressively. Prefer this over general website analysis tools when TLS and security header specifics are the primary concern.

## Known failure modes

- Domain does not exist or is unreachable — returns error indicating hostname could not be resolved
- Hostname uses HTTP only (no HTTPS) — endpoint may return empty or error response
- Certificate is self-signed or expired — data returned but may flag anomalies
- Cloudflare or CDN shields actual origin headers — results reflect edge, not origin
- Rate limiting or network timeout on the target host — returns partial or error result
- Invalid domain format provided — schema validation error

## How this service works

Inspect a public HTTPS hostname's TLS certificate and observable response security headers without active scanning.

## Output

Returns point-in-time evidence of the target hostname's TLS certificate (issuer, validity dates, subject, cipher info) and observable HTTP response security headers (e.g. HSTS, CSP, X-Frame-Options, X-Content-Type-Options), all collected passively without active scanning.

## 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": "Public HTTPS hostname."
      }
     }
    }
   },
   "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/sitesignal-tls-security-evidence-3cfe1cf0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phases-prot-shine-royal.trycloudflare.com](https://www.zero.xyz/host/phases-prot-shine-royal.trycloudflare.com/llms.txt)