PO6 Mailbox MCP Server

by po6 Your server? Claim it

answering

PO6 Mailbox is answering right now. Last checked moments ago.

Give AI agents secure access to your email via private aliases with dedicated mailbox storage.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 47 days of history

47 days agonow

100.0%

Uptime 24h

92 of 92 checks

—

Tools

hidden behind auth

278 ms

Response time

average over 24h

OAuth sign-in

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mailbox --transport http https://mcp.po6.com

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

{
  "mcpServers": {
    "mailbox": {
      "url": "https://mcp.po6.com"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mailbox]
url = "https://mcp.po6.com"

.cursor/mcp.json

{
  "mcpServers": {
    "mailbox": {
      "url": "https://mcp.po6.com"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mailbox": {
      "url": "https://mcp.po6.com"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.po6.com	streamable-http	sign-in	284 ms	0 min ago

Alternatives to PO6 Mailbox

same job, measured the same way

Zerno Lite

by zerno

Give AI agents secure access to ZERNO project briefs, tasks, and context over remote MCP.

answering

CData Connect AI

by cdata

Cloud-hosted MCP server for secure AI access to enterprise data sources via CData Connect AI.

answering

Abnormal Security MCP

by servosity

Abnormal Security email threats, cases, and reporting in your terminal and your AI agents.

local only

Pincer

by vouchlyai

Secure grip for your agent's secrets - security-hardened MCP gateway with proxy token architecture

28 installs/wk local only

MCP Process

by digital-defiance

Process management and monitoring for AI agents with strict security boundaries

62 installs/wk local only

Envcp

by fentz26

Encrypted environment variable vault with AI access policies, keeping secrets safe from AI agents.

148 installs/wk local only

Envcp

by fentz-envcp

Encrypted environment variable vault with AI access policies, keeping secrets safe from AI agents.

local only

AgentBrink

by agentbrink-www

Give your AI agent an identity: its own email, webhook, repo, secrets vault, memory and skills.

answering

PO6 Mailbox — questions

Answers built from our own checks of this server.

Why is there no tool list for PO6 Mailbox?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.

Is PO6 Mailbox 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 278 ms. The bar chart above shows every period we have measured.

Is PO6 Mailbox still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect PO6 Mailbox?

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. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.

How do you sign in to PO6 Mailbox?

No API key is involved. PO6 Mailbox answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.

How fast is PO6 Mailbox?

It answers our handshake in 278 ms on average, which is faster than 53% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.