WarmInboxes Free Deliverability Tools

{
  "mcpServers": {
    "com.warminboxes/deliverability-tools": {
      "url": "https://warminboxes.com/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

25 shown · authentication unknown

• Bounce messages explained

  analyze_bounces

  Classify bounce messages (NDRs): invalid address, full or disabled mailbox, reputation block, authentication failure, throttling, content block or configuration, each with whether it is hard, soft or a block, why it happened and what to do. Separate several bounces with a blank line.

  Schema valid · SHA-256 4a83b50b8002…

  View input schema

  {
    "type": "object",
    "properties": {
      "bounces": {
        "type": "string",
        "description": "One or more bounce messages as pasted text, separated by a blank line or ---."
      }
    },
    "required": [
      "bounces"
    ],
    "additionalProperties": false
  }

• Cold email spam check

  analyze_cold_email

  Score a cold email's copy 0-100 for spam risk before it is sent: weighted trigger words by category and severity (subject hits weigh extra), ALL-CAPS, links and shorteners, currency and percent-off offers, obfuscated spellings, missing personalisation or opt-out, length. Returns each finding with how much it cost and how to fix it. Content only: it cannot see reputation or authentication.

  Schema valid · SHA-256 cedbd69ce957…

  View input schema

  {
    "type": "object",
    "properties": {
      "subject": {
        "type": "string",
        "description": "The subject line. Optional, but subject-line triggers weigh extra."
      },
      "body": {
        "type": "string",
        "description": "The email body as plain text, merge tags included."
      }
    },
    "required": [
      "body"
    ],
    "additionalProperties": false
  }