# Email Security Checker — MCP tool `findutils:email_security_checker`

Return an email-security report for the domain of an email address: MX, SPF, DKIM (common selectors), DMARC, MTA-STS, TLS-RPT and BIMI checks with a 0-100 score and recommendations. Records are resolved through Cloudflare DNS-over-HTTPS.

- Category: network
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/email-security-checker/execute (no API keys, 60 req/min per IP)
- Network tool: fetches a fixed, hard-coded public upstream (never a private host).
- Reference page: https://findutils.com/mcp/email-security-checker/
- Same tool on the other surface: https://findutils.com/api/email-security-checker/

## Connect

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Claude Desktop (`claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}
```

## Call the tool (verified example)

```bash
curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "email_security_checker",
      "arguments": {
        "email": "hello@example.com"
      }
    }
  }'
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `email` | string | yes | Email address (e.g. "name@example.com") or a bare domain ("example.com"). |

Example arguments (verified):

```json
{
  "email": "hello@example.com"
}
```

## Also a REST endpoint

```bash
curl -X POST https://api.findutils.com/api/tools/email-security-checker/execute \
  -H "Content-Type: application/json" \
  -d '{
    "email": "hello@example.com"
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/email-security-checker
```

Full REST reference: https://findutils.com/api/email-security-checker/ · OpenAPI 3.1 spec: https://findutils.com/api/openapi.json

---
Full catalog: POST https://mcp.findutils.com/ with method `tools/list` · https://findutils.com/mcp/ · https://findutils.com/llms.txt