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MCP live MCP 2025-11-25 streamable-http

Pipefire email deliverability tools

ai.pipefire/pipefire

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

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Watch this dependency Share evidence report
Uptime
100.0%
3 direct probes · 30d
Response
450ms
last probe
Tools
16
callable
Resources
1
readable
Prompts
2
available
Primary URL
https://pipefire.ai/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
16 tools, 1 resources, 2 prompts returned.
pass 3 or more catalogue items 10/10
19 items in total; 3 or more earns these points.
pass Describes itself 10/10
99 characters; more than 30 earns these points.

Tools · 16

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 ema…

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DMARC record: whether one exists at _dmarc, its policy (none, quarantine, reject), whether reports are collected, and outdated tags.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 b…

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 authentica…

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 wh…

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.

Resources · 1

guides

Every published Pipefire guide, with its URL and a one-line summary.

pipefire://guides

Prompts · 2

audit_domain

Run every Pipefire check on a domain and get a prioritised fix list.

why_spam

Paste the headers of a message that landed in spam and find the cause.

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://pipefire.ai/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "pipefire_email_deliverability_tools": {
      "url": "https://pipefire.ai/mcp",
      "transport": "streamable-http"
    }
  }
}