# tools_ssl_check

Free public API. Check the TLS certificate of any public hostname. Returns issuer, subject, validity dates, days until expiry, full chain, cipher, protocol, and SAN list. No Bearer required.

Agent View of the PolicyLayer registry record for `tools_ssl_check`. HTML page: https://policylayer.com/tools/dev-domainee-domainee/tools-ssl-check

## Facts

- Tool: `tools_ssl_check`
- Server: Domainee (`https://mcp.domainee.dev/mcp`) — https://policylayer.com/tools/dev-domainee-domainee.md
- Homepage: https://github.com/https://mcp.domainee.dev/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `host` | string | yes | Hostname to check. Optionally with port, e.g. example.com:443. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "tools_ssl_check",
    "arguments": {
      "host": "<host>"
    }
  }
}
```

## Why tools_ssl_check is rated Low

Even though tools_ssl_check only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signals: Accepts URL/endpoint input (host)

## Use case

AI agents call tools_ssl_check to retrieve information from Domainee without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Domainee:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "tools_ssl_check": {}
  }
}
```

## Other tools on Domainee (15)

- `tools_cname_lookup` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-cname-lookup.md
- `tools_dkim_record_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-dkim-record-checker.md
- `tools_dmarc_record_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-dmarc-record-checker.md
- `tools_dns_propagation_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-dns-propagation-checker.md
- `tools_dns_record_lookup` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-dns-record-lookup.md
- `tools_domain_age_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-domain-age-checker.md
- `tools_domain_availability_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-domain-availability-checker.md
- `tools_http_header_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-http-header-checker.md
- `tools_redirect_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-redirect-checker.md
- `tools_reverse_ip_lookup` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-reverse-ip-lookup.md
- `tools_spf_record_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-spf-record-checker.md
- `tools_subdomain_finder` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-subdomain-finder.md
- `tools_txt_record_lookup` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-txt-record-lookup.md
- `tools_website_status_checker` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-website-status-checker.md
- `tools_whois_lookup` — Read — https://policylayer.com/tools/dev-domainee-domainee/tools-whois-lookup.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dev-domainee-domainee · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-domainee-domainee