MCP server

Powerline Email Tools Official

ai.powerline/email-tools

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words

Website

At a glance

Type

MCP server

Publisher

powerline.ai (verified by the MCP Registry)

Status

Working at last check

Tools

5

Token cost

About 932 tokens per request

Sets up in

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

Last checked

26 Oct 2026, 08:29 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 email-tools https://powerline.ai/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.email-tools]
url = "https://powerline.ai/mcp"

Gemini CLI

{"mcpServers":{"email-tools":{"httpUrl":"https://powerline.ai/mcp"}}}

Cursor

{"mcpServers":{"email-tools":{"url":"https://powerline.ai/mcp"}}}

VS Code

{"servers":{"email-tools":{"type":"http","url":"https://powerline.ai/mcp"}}}

Antigravity

agy mcp add email-tools https://powerline.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":"email-tools","server_url":"https://powerline.ai/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"email-tools","server_url":"https://powerline.ai/mcp"}

Tools

• analyze_headers ~142 tokens
  Parse raw email headers: the Received delivery path with per-hop delays, the receiving server's SPF/DKIM/DMARC verdicts, DMARC alignment of the From domain, DKIM signatures, the sending IP, and bulk-sender requirements such as one-click unsubscribe.
• check_blacklists ~146 tokens
  Check an IPv4 address against about 18 IP blacklists (SpamCop, Barracuda, UCEPROTECT, PSBL, Mailspike, ...) or a domain against domain blacklists. Each list is verified with its test entries first, so lists that refuse public resolvers (such as Spamhaus) are reported as unavailable rather than clean
• check_domain Sends messages · ~208 tokens
  Run every email-authentication check on a domain (SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, BIMI, plus domain and mail-server blacklists) and return a score out of 100, per-check findings and a prioritized fix list. Use this first when asked whether a domain is set up correctly to send email.
• check_record ~274 tokens
  Look up and validate a single email DNS record for a domain, explaining each tag. record is one of spf, dmarc, dkim, bimi, mta-sts, tls-rpt, mx. SPF counts the 10-lookup limit; DMARC checks policy, reporting and external report authorization; DKIM sizes the key; MTA-STS fetches the policy file and c
• check_spam_words ~162 tokens
  Scan an email subject and body (plain text or HTML) for spam-trigger phrases by category, ALL-CAPS, exclamation runs, emoji, URL shorteners and image-heavy HTML. Returns a low/medium/high risk reading and, optionally, a rule-based rewrite.

Browse

• IPv4 tools
• Domains and DNS
• Email

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