What is MailFathom?
MailFathom is a MCP server by Krzysztof318 that self-hosted email search: syncs IMAP mailboxes into PostgreSQL to list, search and read mail and ask cited questions across the archive. It is listed under Knowledge & memory and has 16 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | Krzysztof318 |
| Repository | Krzysztof318/MailFathom |
| Popularity | 16 GitHub stars |
| Category | Knowledge & memory |
| Security | Low risk (84/100) |
| Rank | #1,437 of 4,418 MCP servers; #160 in Knowledge & memory |
| License | AGPL-3.0 |
| Last commit | 2026-10-18 |
| Stars this week | +1 |
| Runs | Locally |
| Language | C# |
| Platforms | Linux |
Is MailFathom safe to install?
MailFathom scores 84/100 on the MCPMods security check: Low risk. Things to review: can take actions such as send, write or deploy. It passed 4 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Can take actions such as send, write or deploy | Review |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install MailFathom?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/Krzysztof318/MailFathom
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add mailfathom -- <command from README> claude mcp add --transport http mailfathom <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs MailFathom for you:
Add the "MailFathom" MCP server from https://github.com/Krzysztof318/MailFathom to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.