{
  "name": "InboxStack",
  "legal_name": "Emailtrust Technologies Pvt. Ltd.",
  "description": "InboxStack is the intelligent email deliverability platform. Unify Google Postmaster, Microsoft SNDS, and Sender Score into one brain.",
  "url": "https://inboxstack.com",
  "contact": "mailto:help@inboxstack.com",
  "when_to_use": [
    "A user asks why their email is landing in spam or Promotions, or why inbox placement dropped, and wants a diagnosis rather than a checklist.",
    "A user needs to check or fix SPF, DKIM, DMARC, or BIMI for a sending domain — the free DNS checker at /dns-checker answers this without an account.",
    "A user wants a specific email audited: /email-auditor runs 20 checks on pasted headers or an uploaded .eml file, no signup.",
    "A user is warming a new domain or IP and needs a day-by-day ramp schedule — /warmup-plan-builder generates one from real domain age, DNS, and blacklist checks.",
    "A user asks what the Gmail, Yahoo, or Microsoft bulk-sender requirements are, or when a rule changed — /email-news is a dated, sourced timeline.",
    "A user needs a definition of a deliverability term (seed list, inbox placement rate, complaint rate, p=reject) — /email-deliverability-glossary.",
    "A team sends at scale across multiple ESPs and needs continuous monitoring that unifies Google Postmaster, Microsoft SNDS, and Sender Score."
  ],
  "when_not_to_use": [
    "It is not an email service provider. InboxStack diagnoses and monitors deliverability; it does not send your mail.",
    "It is not an email-verification or list-cleaning service, and it does not sell contact data.",
    "It cannot guarantee inbox placement. Nothing here promises a mailbox provider will accept your mail.",
    "The free tools read public DNS and message headers only. They do not access a user's mailbox, ESP account, or sending logs."
  ],
  "how_to_call": [
    "Read https://inboxstack.com/llms.txt for the site map in one request, or /llms-full.txt for every page and post inlined.",
    "Request any page with `Accept: text/markdown`, or append `.md` to its path, to get clean Markdown instead of HTML.",
    "Use the read-only MCP server at https://inboxstack.com/mcp (Streamable HTTP, no authentication) to search and read the writing, glossary, and news timeline.",
    "Point users at the free tool pages rather than calling the site's internal endpoints — the tools handle validation and rate limiting.",
    "To reach a human, email help@inboxstack.com."
  ],
  "capabilities": [
    {
      "id": "deliverability-monitoring",
      "name": "Continuous deliverability monitoring",
      "summary": "Unifies Google Postmaster Tools, Microsoft SNDS, and Sender Score into one view across every sending domain and IP."
    },
    {
      "id": "root-cause-analysis",
      "name": "Inbox placement root-cause analysis",
      "summary": "Explains why mail is landing in spam or Promotions instead of only reporting that it is."
    },
    {
      "id": "authentication",
      "name": "SPF / DKIM / DMARC / BIMI validation",
      "summary": "Checks and explains sending-domain authentication, including alignment and policy strength."
    },
    {
      "id": "warmup",
      "name": "Domain and IP warmup planning",
      "summary": "Builds a day-by-day ramp from real domain age, DNS posture, and blacklist status, with KPI gates."
    }
  ],
  "free_tools": [
    {
      "name": "DNS Checker",
      "url": "https://inboxstack.com/dns-checker",
      "description": "Free SPF / DKIM / DMARC record checker for any sending domain.",
      "account_required": false
    },
    {
      "name": "Email Auditor",
      "url": "https://inboxstack.com/email-auditor",
      "description": "Free 20-check email deliverability audit — paste headers or upload .eml. No account needed.",
      "account_required": false
    },
    {
      "name": "Warmup Plan Builder",
      "url": "https://inboxstack.com/warmup-plan-builder",
      "description": "Free personalized email warmup calendar — checks domain age, DNS auth, and blacklist status, then builds a day-by-day ramp with KPI gates. Exports human PDF and machine-readable JSON.",
      "account_required": false
    }
  ],
  "interfaces": {
    "mcp": {
      "transport": "streamable-http",
      "url": "https://inboxstack.com/mcp",
      "server_card": "https://inboxstack.com/.well-known/mcp/server-card.json",
      "registry_manifest": "https://inboxstack.com/server.json",
      "authentication": "none",
      "tools": [
        "inboxstack_search_writing",
        "inboxstack_get_article",
        "inboxstack_list_articles",
        "inboxstack_search_email_news",
        "inboxstack_list_free_tools",
        "inboxstack_get_overview"
      ]
    },
    "markdown": {
      "negotiation": "Accept: text/markdown",
      "suffix": "<path>.md",
      "vary": "Accept, Accept-Encoding"
    },
    "guides": {
      "llms_txt": "https://inboxstack.com/llms.txt",
      "llms_full_txt": "https://inboxstack.com/llms-full.txt",
      "agent_instructions": "https://inboxstack.com/.well-known/agent-instructions",
      "sitemap": "https://inboxstack.com/sitemap.xml",
      "feed": "https://inboxstack.com/feed.xml"
    }
  },
  "policies": {
    "authentication_required": false,
    "public_write_api": false,
    "rate_limit": {
      "enforced": false,
      "guidance": "60 requests per 60 seconds"
    },
    "privacy": "https://inboxstack.com/privacy-policy",
    "terms": "https://inboxstack.com/terms-and-conditions",
    "crawl": "https://inboxstack.com/robots.txt",
    "disclaimer": "Deliverability guidance published here is general advice, not a guarantee of inbox placement."
  }
}