mailpit

mailpit is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from CeDJeY/mailpit-mcp-server. Its token cost is not measured, scanned A, original, MIT.

A remote MCP server that connects an AI coding assistant to Mailpit, a test mailbox for capturing and inspecting application emails.

In plain words
What is it for?
Use it to configure the Mailpit MCP URL and authentication token so email-testing tools can access the mailbox.
Why use it?
It provides the connection details needed for the assistant to work with the correct Mailpit instance, with optional bearer-token authentication.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Part of the mailpit plugin — 2 skills, 1 MCP server shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/cedjey/mailpit-mcp-server/mailpit
Clone the repo
git clone --depth 1 https://github.com/CeDJeY/mailpit-mcp-server

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Or install mailpit, the plugin that ships this one along with the rest of its 2 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mailpit

README.md
[![agentmods](https://agentmods.dev/badge/mcp/cedjey/mailpit-mcp-server/mailpit.svg)](https://agentmods.dev/mcp/cedjey/mailpit-mcp-server/mailpit)
Your own site
<a href="https://agentmods.dev/mcp/cedjey/mailpit-mcp-server/mailpit"><img src="https://agentmods.dev/badge/mcp/cedjey/mailpit-mcp-server/mailpit.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

mailpit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugin/.mcp.json · 9 lines

What it actually says

{
  "mailpit": {
    "type": "http",
    "url": "${user_config.mcp_url}",
    "headers": {
      "Authorization": "Bearer ${user_config.auth_token}"
    }
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 9 lines scan A a11e26ddae77

Subscribe to this mod's changes

mailpit is an MCP server published in the GitHub repository CeDJeY/mailpit-mcp-server (0 stars, last pushed 2mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.