agentmods.dev

mailflat-mcp

An MCP server that lets an AI agent work with real email inboxes through the Mailflat service. It supports actions including creating an inbox, waiting for a one-time passcode, and sending email, and it requires two environment variables.

In plain words
What is it for?
Use it for workflows that need an inbox, must wait for an emailed one-time passcode, or need to send email through Mailflat.
Why use it?
It removes the need to handle temporary inboxes and email-code retrieval manually during an agent workflow. The server connects the MCP client to the external Mailflat email service.

MCP server for Claude CodeCodexCursor

0 9d ago A scan tokens not measured original MIT
View the source file MailFlat/mailflat-sdks
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/mailflat/mailflat-sdks/mailflat-mcp
Clone the repo
git clone --depth 1 https://github.com/MailFlat/mailflat-sdks

Made for: Claude Code, Codex, Cursor.

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

mailflat-mcp 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 2d 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.

listed in the official MCP registry · 12 lines

What it actually says

{ "mailflat-mcp": { "command": "uvx", "args": [ "mailflat-mcp" ], "env": { "MAILFLAT_API_KEY": "", "MAILFLAT_API_URL": "" } } }

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. 2d ago First seen · 12 lines scan A d01b416acb48

Subscribe to this mod's changes

mailflat-mcp is an MCP server published in the GitHub repository MailFlat/mailflat-sdks (0 stars, last pushed 9d 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.

ai-agentsemail-apiemail-testingmcpotp
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