Postbox Tools

Connect Remote server

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

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

{
  "servers": {
    "postbox-tools": {
      "type": "http",
      "url": "https://mcp.postboxservices.com/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://mcp.postboxservices.com/mcp

Tools 10 found in our last check

• 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 and SpamCop. Checks the exact target given: domains are not resolved to IPs. Returns per-list listing status.

• 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 domains). Returns an A-F grade with findings.

• 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 (cross-domain jumps, https downgrades, meta/JS redirects). Fetching is SSRF-hardened (private ranges blocked, HTTPS-onl…

• create_mailtest

  Create a disposable test address for a full email deliverability audit (score /10: SPF, DKIM, DMARC + alignment, blacklists, reverse DNS, SpamAssassin content, Gmail/Yahoo bulk-sender compliance). The USER must then send an email from the system they want to test to the returned…

• 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 reverse-DNS cannot be verified from a file - for the authoritative score use create_mailtest instead.

• 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/Secure profile, and reports whether a certificate (a=, VMC or CMC) is referenced. Does not verify the certificate itsel…

• 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: robots.txt access for each major AI crawler (answer-engine vs training), sitemap.xml, plus llms.txt and ai.txt as informa…

Details

More developer tools servers See all

• AGILEX Docs

  Official AGILEX robotics product docs: manuals, CAN protocol, firmware, FAQ. Read-only.

• Echoo public catalog

  Read-only Echoo product facts, pricing, documentation and published writing skills.

• 99tests

  Order human-run real-device app tests from your coding agent; verified bugs return as fix prompts.

• LimitReceipts by aiw3b

  Find the AI coding/app-builder plan that fits your usage: limits, prices and plan-fit picks.

• Candor UI docs

  Candor UI docs and component suggestions. Read-only, no key, never serves paid source.

• MoneyTools Tools

  Call for a cheap read-only utility: 100+ tools; free daily tier; not charged on failure