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Email

Email verification for agents: normalize, syntax validate, domain/MX checks (Linux dig, hard timeout), disposable-domain and role-mailbox detection. Never sends email; never SMTP-probes mailboxes.

Service id: email
Version: 0.1.0
Status: available

Authentication

MCP endpoint: https://mcp.glc-rag.hu/mcp (streamable HTTP)

Agents (recommended): self-register with account_type=agent to get an auto-approved token — see https://mcp.glc-rag.hu/guide/agent.

Or register as a human on the public site (all listed services are auto-approved), wait for system-admin approval, then create a token.

Authorization: Bearer mcp_...

Cursor mcp.json example:

{
  "mcpServers": {
    "email": {
      "url": "https://mcp.glc-rag.hu/mcp",
      "headers": {
        "Authorization": "Bearer mcp_YOUR_TOKEN"
      }
    }
  }
}

Tools

email_normalize

Normalize email (lowercase, IDNA domain). Optional Gmail dot/+ strip flags.

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    },
    "gmail_dots": {
      "type": "boolean",
      "default": false
    },
    "strip_plus": {
      "type": "boolean",
      "default": false
    }
  },
  "required": [
    "email"
  ],
  "additionalProperties": false
}

Examples:

{
  "email": "Info@Example.COM"
}

email_validate

Syntax/sanity validation only (no DNS).

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    }
  },
  "required": [
    "email"
  ],
  "additionalProperties": false
}

Examples:

{
  "email": "user@example.com"
}

{
  "email": "not-an-email"
}

email_domain_check

Domain label/IDN check; optional A/AAAA resolve via dig.

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    },
    "domain": {
      "type": "string",
      "description": "Domain only (if email omitted)"
    },
    "resolve_a": {
      "type": "boolean",
      "default": false
    },
    "timeout_ms": {
      "type": "integer",
      "minimum": 500,
      "maximum": 5000,
      "default": 2000
    }
  },
  "additionalProperties": false
}

Examples:

{
  "email": "a@example.com"
}

{
  "domain": "example.com",
  "resolve_a": true
}

email_mx_check

MX lookup via Linux dig (A/AAAA fallback). No SMTP.

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    },
    "domain": {
      "type": "string"
    },
    "timeout_ms": {
      "type": "integer",
      "minimum": 500,
      "maximum": 5000,
      "default": 2000
    }
  },
  "additionalProperties": false
}

Examples:

{
  "email": "user@gmail.com"
}

email_disposable_check

Check local disposable/temp email domain list.

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    }
  },
  "required": [
    "email"
  ],
  "additionalProperties": false
}

Examples:

{
  "email": "x@mailinator.com"
}

email_role_detect

Detect role/shared local-parts (admin, noreply, support, …).

Input schema:

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "Email address to inspect"
    }
  },
  "required": [
    "email"
  ],
  "additionalProperties": false
}

Examples:

{
  "email": "admin@example.com"
}

email_status

Email service health: dig path, list sizes, DNS limits.

Input schema:

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

Examples:

{}

Usage notes

Typical flow: email_normalize → email_validate → email_domain_check → email_mx_check → email_disposable_check → email_role_detect. DNS tools use dig off the event loop (max concurrent + timeout) so web/MCP stay responsive. Credits apply per successful tool call; email_status is free.

Errors / limits

Invalid email shape → is_error or valid=false. dig missing / DNS timeout → ok=false with errors[]. Never blocks the platform event loop.

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