Powerline Email Tools MCP Server

by powerline Your server? Claim it

answering

Powerline Email Tools is answering right now. Last checked 4 min ago. It exposes 5 tools.

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

Uptime history 10 days of history · worst day 99%

10 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

190 ms

Response time

average over 24h

open, no key

Access

streamable-http

Powerline Email Tools missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email-tools --transport http https://powerline.ai/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

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

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

analyze

analyze_headers

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.

blacklists

check_blacklists

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.

domain

check_domain

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.

record

check_record

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 compares it with the MX hosts; BIMI checks the logo (SVG Tiny PS) and mark certificate.

spam

check_spam_words

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.

Endpoints

URL	Transport	State	Latency	Checked
https://powerline.ai/mcp	streamable-http	answering	467 ms	4 min ago

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Powerline Email Tools — questions

Answers built from our own checks of this server.

What can Powerline Email Tools do?

It exposes 5 tools, read directly from the server on our last check. Among them: analyze_headers, check_blacklists, check_domain, check_record, check_spam_words. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Powerline Email Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 190 ms. The bar chart above shows every period we have measured.

How do I connect Powerline Email Tools?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Powerline Email Tools need an API key?

No. Powerline Email Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Powerline Email Tools?

It answers our handshake in 190 ms on average, which is faster than 65% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.