All servers · Email & messaging

Pipefire email deliverability tools

ai.pipefire/pipefire · v1.0.0

Measured by MCP Station

Description written by the publisher, not verified

Free email deliverability tools: SPF, DKIM, DMARC, blacklist and header checks, cold email scoring.

Connect

claude mcp add --transport http pipefire https://pipefire.ai/mcp

{
  "mcpServers": {
    "pipefire": {
      "url": "https://pipefire.ai/mcp"
    }
  }
}

Tools as reported by the server

• check_domain_email_setup
  Check whether a domain is set up to send and receive email properly: MX, SPF, DKIM and DMARC in one go, each with pass/warn/fail, what was found, and how to fix it. Use when someone asks why their email goes to spam, whether their domain is set up right, or before sending cold email.
• check_dmarc
  Check a domain's DMARC record: whether one exists at _dmarc, its policy (none, quarantine, reject), whether reports are collected, and outdated tags. Tells you whether the domain can be impersonated by email.
• check_spf
  Check a domain's SPF record: whether it exists, is valid, stays under the 10 DNS lookup limit, and ends with a sensible all mechanism.
• check_dkim
  Look up a domain's DKIM public key, trying the selectors Google Workspace, Microsoft 365 and common senders use, plus one you name.
• check_mx
  List a domain's mail servers (MX records) and which provider handles its email.
• check_bimi
  Check a domain's BIMI record (logo in the inbox) and whether its DMARC policy is strict enough for BIMI to show.
• check_mta_sts
  Check a domain's MTA-STS policy, which forces encrypted delivery of incoming mail.
• check_blacklists
  Check whether a domain's sending IPs, or a single IPv4 address, are listed on the major email blacklists (Spamhaus, Barracuda, SpamCop and others), with removal links.
• analyze_email_headers
  Read the raw headers of a received email: SPF, DKIM and DMARC results, alignment, the delivery path and delays. Use when someone pastes headers and asks why a message went to spam or failed authentication.
• check_cold_email
  Score a cold email (subject and body) out of 10 against the rules Pipefire checks its own emails with: length, reading level, the ask, subject line, and spam-filter wording. Returns each issue with why it matters and how to fix it.
• test_subject_line
  Score a cold email subject line out of 10: length, wording that hurts opens, and spam trigger words, with fixes.
• suggest_sending_domains
  Suggest lookalike sending domains for cold email (so the main domain is never put at risk), with live .com/.net availability. Give a business name or its website.
• guess_email_addresses
  List the likely email address formats for a person at a company domain (first@, first.last@, flast@ ...). Guesses only: verify before sending.
• generate_spf_record
  Build a valid SPF TXT record for a domain from the email services it sends with, with warnings about the 10-lookup limit.
• generate_dmarc_record
  Build a valid DMARC TXT record (to publish at _dmarc.yourdomain) from a policy and report addresses.
• generate_dkim_record
  Format a DKIM public key as the TXT record to publish at selector._domainkey.yourdomain.

Website · JSON · Text for agents · Registry updated 2026-10-20