# tariffmonkee.com /paid/sitegrade – Domain Security Grader

> tariffmonkee.com /paid/sitegrade – Domain Security Grader is a paid API for AI agents from tariffmonkee.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Checks a domain's HTTPS reachability and security headers (HSTS, CSP, X-Frame-Options, etc.) plus CAA records, returning a 0-100 score with an A-F letter grade and detailed findings.

## Facts

- Endpoint: GET https://tariffmonkee.com/paid/sitegrade
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tariffmonkee-com-paid-sitegrade-domain-security-grader-26332d58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_beo1ZzhHd8qXS3b3Jpoet

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 tariffmonkee-com-paid-sitegrade-domain-security-grader-26332d58
```

Example prompt: What's the security grade for example.com — does it have HTTPS, HSTS, and Content-Security-Policy set up properly?

## When to prefer this

Use this endpoint when you need a quick, structured A-F security posture assessment of a domain's HTTPS and security header configuration. Prefer it over /linkcheck (which checks URL reputation/safety) or /domain-intel (which returns ownership/registration facts). If you need a combined report including all three, use the orchestrated bundle endpoint instead.

## Known failure modes

- Domain is unreachable — HTTPS connect failure noted in findings, still returns a grade
- Invalid or malformed domain input — likely returns an error response
- Domain has no DNS record — connection failure reported
- Payment not settled — 402 response, request not processed

## How this service works

Domain -> security letter grade (0-100, A-F) from HTTPS reachability, security headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy), and CAA records. Reports HTTPS connect success/failure, not raw cert expiry -- Workers can't read a remote server's cert metadata directly. For registration facts use /domain-intel; for URL reputation use /linkcheck.

## Output

Returns a 0-100 numeric score and an A-F letter grade for the domain, along with per-finding details: HTTPS connect success or failure, presence/absence of HSTS, CSP, X-Frame-Options, and other security headers, and CAA DNS record status.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tariffmonkee-com-paid-sitegrade-domain-security-grader-26332d58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tariffmonkee.com](https://www.zero.xyz/host/tariffmonkee.com/llms.txt)