{
  "markdown": "# Domain Deliverability Checker MCP Server\n\n[![Smithery](https://smithery.ai/badge/mambabuilt/mcp-domain-deliverability-checker)](https://smithery.ai/servers/mambabuilt/mcp-domain-deliverability-checker) [![Glama score](https://glama.ai/mcp/servers/mambalabsdev/mcp-domain-deliverability-checker/badges/score.svg)](https://glama.ai/mcp/servers/mambalabsdev/mcp-domain-deliverability-checker) [![MCP Registry](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fregistry.modelcontextprotocol.io%2Fv0%2Fservers%3Fsearch%3Dcom.mambabuilt%252Fmcp-domain-deliverability-checker%26limit%3D1&query=%24.servers%5B0%5D._meta%5B%22io.modelcontextprotocol.registry%2Fofficial%22%5D.status&label=mcp%20registry&color=blue)](https://registry.modelcontextprotocol.io/v0/servers?search=com.mambabuilt/mcp-domain-deliverability-checker&limit=1) [![npm version](https://img.shields.io/npm/v/@mambalabsdev/mcp-domain-deliverability-checker)](https://www.npmjs.com/package/@mambalabsdev/mcp-domain-deliverability-checker) [![npm downloads](https://img.shields.io/npm/dm/@mambalabsdev/mcp-domain-deliverability-checker)](https://www.npmjs.com/package/@mambalabsdev/mcp-domain-deliverability-checker) [![license](https://img.shields.io/github/license/mambalabsdev/mcp-domain-deliverability-checker)](https://github.com/mambalabsdev/mcp-domain-deliverability-checker/blob/main/LICENSE) [![mcpservers.org](https://img.shields.io/badge/mcpservers.org-listed-blue)](https://mcpservers.org/servers/mambalabsdev/mcp-domain-deliverability-checker)\n\nAn MCP server that exposes the Mamba Labs Domain Deliverability Checker as a single tool. Install one package and give your MCP client a way to audit any domain's email deliverability and DNS health, wrapping the Mamba Labs actor on Apify and returning Clay-ready flat JSON.\n\n## What's Inside\n\n- [What it does](#what-it-does)\n- [Quick start](#quick-start)\n- [Prerequisites](#prerequisites)\n- [Example prompts](#example-prompts)\n- [Tool and inputs](#tool-and-inputs)\n- [Full actor documentation](#full-actor-documentation)\n- [Mamba Labs GTM Suite](#mamba-labs-gtm-suite)\n- [License](#license)\n\n## What it does\n\nThis server gives an AI client one tool:\n\n- `check_domain_deliverability`: audit a domain's SPF, DKIM, DMARC, MX, mail provider, DNS blacklist status, catch-all, domain age, and a 0 to 100 deliverability score.\n\nAll of the work runs on Apify. This package is a thin client that routes the tool call to the actor and hands back the result.\n\n## Quick start\n\nYou need Node.js 18 or newer and an Apify account with an API token.\n\nAdd this to your Claude Desktop config:\n\n```json\n{\n  \"mcpServers\": {\n    \"mamba-domain-deliverability-checker\": {\n      \"command\": \"npx\",\n      \"args\": [\"-y\", \"@mambalabsdev/mcp-domain-deliverability-checker\"],\n      \"env\": {\n        \"APIFY_TOKEN\": \"your-apify-token\"\n      }\n    }\n  }\n}\n```\n\nGet your token at https://console.apify.com/account/integrations, paste it in, and restart Claude Desktop. The tool will be available.\n\n## Prerequisites\n\n- Node.js 18 or newer\n- An Apify account with an API token\n\n## Example prompts\n\n- \"Check the email deliverability of stripe.com.\"\n- \"Does github.com have SPF, DKIM, and DMARC set up, and what is its DMARC policy?\"\n- \"Audit these domains for deliverability: stripe.com, notion.so, figma.com.\"\n- \"Is acme.com on any DNS blacklist, and what is its mail provider?\"\n\n## Tool and inputs\n\n`check_domain_deliverability`:\n\n- `domain` (string): bare domain to audit, e.g. stripe.com. Provide this or `domains`.\n- `domains` (array): list of bare domains for batch processing. Takes precedence over `domain`.\n- `batchSize` (number): domains audited concurrently per wave in batch mode. Default 5, maximum 10.\n- `skipCache` (boolean): force a fresh audit and ignore the 24 hour result cache.\n- `attempt_catch_all` (boolean): run the SMTP catch-all probe. Off by default; the Apify platform blocks port 25, so it returns unknown there.\n\n## Full actor documentation\n\nFor the complete input and output reference, pricing, and run history, see the Domain Deliverability Checker actor on the Apify Store (canonical immutable Actor ID URL):\n\nhttps://apify.com/mambalabs/0tVgxI7A6o9jMlxmc\n\n---\n\n## Mamba Labs GTM Suite\n\nThis server is part of the **Mamba Labs GTM Suite**, a fleet of twelve specialized MCP servers for go-to-market signal intelligence, each backed by a dedicated Apify actor.\n\n| Actor | Immutable Actor ID |\n|---|---|\n| [GTM Hiring Signal Scraper](https://console.apify.com/actors/D7O1SA2EqwHGsGr1P) | `D7O1SA2EqwHGsGr1P` |\n| [GTM Tech Stack Signal Enrichment](https://console.apify.com/actors/qyd7nNyqFPelQViBx) | `qyd7nNyqFPelQViBx` |\n| [GTM Signals Aggregator](https://console.apify.com/actors/xKdRfnfFNkdMpFuNs) | `xKdRfnfFNkdMpFuNs` |\n| [Job Board Keyword Signal Scanner](https://console.apify.com/actors/4DvqpvhMR74NLcDDY) | `4DvqpvhMR74NLcDDY` |\n| [Domain to LinkedIn URL Resolver](https://console.apify.com/actors/3HtnSaqPHOg1Qg5gx) | `3HtnSaqPHOg1Qg5gx` |\n| [ICP Fit Scorer](https://console.apify.com/actors/W161DT8W4kW55dMFh) | `W161DT8W4kW55dMFh` |\n| [Domain Deliverability Checker](https://console.apify.com/actors/0tVgxI7A6o9jMlxmc) | `0tVgxI7A6o9jMlxmc` |\n| [Company Firmographic Enricher](https://console.apify.com/actors/YlUtLWjfPpqykmB8g) | `YlUtLWjfPpqykmB8g` |\n| [Company Social Presence Mapper](https://console.apify.com/actors/4k6CCemkgBDz18m2h) | `4k6CCemkgBDz18m2h` |\n| [Company Identity Resolver](https://console.apify.com/actors/lr8fTRAmZCBZmuwwh) | `lr8fTRAmZCBZmuwwh` |\n| [Company Change-Event Feed](https://console.apify.com/actors/oX44rS0fkEJ3rXLWe) | `oX44rS0fkEJ3rXLWe` |\n| [Funding & Press Signal Scanner](https://console.apify.com/actors/FS13X6dhQVgX3XOM6) | `FS13X6dhQVgX3XOM6` |\n\n> Built by [Mamba Labs](https://github.com/mambalabsdev) | [npm](https://www.npmjs.com/org/mambalabsdev) | [Apify Store](https://apify.com/mambalabs)\n\n## License\n\nMIT\n\nBuilt by Mamba Labs. https://apify.com/mambalabs\n",
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}