What tools does the deliverability-doctor MCP server provide?

deliverability-doctor exposes 2 tools: check_email_security, compare_email_security. This list was returned by the running server when we connected to it.

Does deliverability-doctor require an API key?

No. deliverability-doctor answered a tools/list request without credentials.

How do I install deliverability-doctor?

Run: claude mcp add --transport http deliverability-doctor https://deliverability-doctor.deliverability-doctor.workers.dev/mcp. One-click install links for Cursor and VS Code are also available on the server's page.

Connection check verified live · 27h ago

deliverability-doctor

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

Browser automation Communication Code & repositories

Install

Remote (HTTP)

claude mcp add --transport http deliverability-doctor https://deliverability-doctor.deliverability-doctor.workers.dev/mcp

Tools 2

GitHub stars —

Installs / wk —

Licence —

Transport streamable-http

Last checked 27h ago

Tools & capabilities

2 tools

Read from the running server on 27h ago.

check_email_security domain*

Checks whether a domain can be email-spoofed, using public DNS only. Verifies SPF (including the RFC 7208 multiple-record permerror), DMARC policy and reporting, MX, and DKIM at co…

compare_email_security domains*

Runs the email-security check on 2–5 domains and returns a comparison table with per-domain grades. Useful for checking your domain against competitors.

Context cost

Light

Connecting this server adds 2 tool definitions to every request — roughly 180 tokens before you ask anything.

Adds little to your context. Safe to keep connected.

Estimated at ~90 tokens per tool. Actual size varies with schema complexity — treat this as an order of magnitude, not a measurement.

Similar servers

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Ranked by shared tools where both expose an inventory, otherwise by shared wording.

Source & links

Repository: integrity-os/deliverability-doctor
Registry: io.github.Integrity-Os/deliverability-doctor
Endpoint: https://deliverability-doctor.deliverability-doctor.workers.dev/mcp
Sources: registry