com.postboxservices/postbox-tools

up checked 2026-11-11T13:38:04.135Z

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Publisher-provided description

Free email checks: 24 blacklists, spoofing grade, redirects, spam test, WHOIS, BIMI, AI readiness.

Summary by lookupd

Lets agents check email deliverability, blacklists, spoofing exposure, BIMI, redirects, domain age and AI discoverability for domains and…

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http postbox-tools https://mcp.postboxservices.com/mcp

Codex, remote (streamable-http)

codex mcp add postbox-tools --url https://mcp.postboxservices.com/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "postbox-tools": {
      "url": "https://mcp.postboxservices.com/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (10 tools)

Publisher-provided text

• check_blacklist Check a domain against domain blacklists (Spamhaus DBL, SURBL, URIBL and others), or an IP address against 24 IP blacklists including Spamhaus ZEN, Barracuda an
• check_spoofability Grade how exposed a domain is to email spoofing and business email compromise, from its public DNS (SPF, DMARC policy strength, alignment, live lookalike domain
• trace_redirect Follow a URL server-side through every HTTP redirect hop to its real final destination - per-hop status, IP, TLS and timing, plus phishing/deliverability flags
• create_mailtest Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content,
• get_mailtest_result Fetch the score and breakdown of a mail test created with create_mailtest, once the user has sent their email to the disposable address.
• analyze_eml Run a deliverability/content analysis on a raw RFC 822 email (.eml source: full headers + body). IMPORTANT LIMITS: with no live SMTP session, SPF, blacklist and
• get_domain_age Get a domain's registration date and age (young domains have weak sending reputation).
• whois_lookup WHOIS summary for a domain: registrar, created/updated/expires dates, nameservers, DNSSEC, status flags.
• check_bimi Check a domain's BIMI setup: looks up the default._bimi TXT record, fetches the logo it points to (l=) and validates the SVG against the BIMI SVG Tiny Portable/
• check_ai_discoverability Grade how discoverable a website is to AI answer engines (ChatGPT search, Perplexity, Claude, Google AI Overviews, Copilot and others) from its public files: ro

Details

• Version: 0.2.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 480 ms
• First indexed: 2026-11-01T08:56:45.632Z
• Last seen in registry: 2026-11-05T19:17:13.403Z
• Website: https://postboxservices.com/mcp/

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