MCP server

Pipefire email deliverability tools Official

ai.pipefire/pipefire

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

pipefire.ai (verified by the MCP Registry)

Status

Working at last check

Tools

16

Token cost

About 2,404 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.pipefire]
url = "https://pipefire.ai/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"pipefire":{"type":"http","url":"https://pipefire.ai/mcp"}}}

Antigravity

agy mcp add pipefire https://pipefire.ai/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"pipefire","server_url":"https://pipefire.ai/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"pipefire","server_url":"https://pipefire.ai/mcp"}

Tools

• analyze_email_headers ~145 tokens
  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_bimi ~120 tokens
  Check a domain's BIMI record (logo in the inbox) and whether its DMARC policy is strict enough for BIMI to show.
• check_blacklists ~130 tokens
  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.
• check_cold_email ~184 tokens
  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.
• check_dkim ~163 tokens
  Look up a domain's DKIM public key, trying the selectors Google Workspace, Microsoft 365 and common senders use, plus one you name.
• check_dmarc ~148 tokens
  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_domain_email_setup ~193 tokens
  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_mta_sts ~112 tokens
  Check a domain's MTA-STS policy, which forces encrypted delivery of incoming mail.
• check_mx ~110 tokens
  List a domain's mail servers (MX records) and which provider handles its email.
• check_spf ~126 tokens
  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.
• generate_dkim_record ~138 tokens
  Format a DKIM public key as the TXT record to publish at selector._domainkey.yourdomain.
• generate_dmarc_record ~182 tokens
  Build a valid DMARC TXT record (to publish at _dmarc.yourdomain) from a policy and report addresses.
• generate_spf_record ~266 tokens
  Build a valid SPF TXT record for a domain from the email services it sends with, with warnings about the 10-lookup limit.
• guess_email_addresses ~148 tokens
  List the likely email address formats for a person at a company domain (first@, first.last@, flast@ ...). Guesses only: verify before sending.
• suggest_sending_domains ~138 tokens
  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.
• test_subject_line ~101 tokens
  Score a cold email subject line out of 10: length, wording that hurts opens, and spam trigger words, with fixes.

Browse

• Microsoft tools
• IPv4 tools
• Domains and DNS
• Email

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