Postfleet

Name: Postfleet
Author: Thestral12

by Thestral12version 0.1.4i★ –iComputer or cloud

Registry nameai.postfleet/postfleet

Install

Overview

Description from the maker (original English)

Give an AI agent its own email address: send, reply, read, and wait for mail.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Chat & email
You need to fill in: POSTFLEET_API_KEY, Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: POSTFLEET_API_KEY, POSTFLEET_API_URL, Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "postfleet": {
      "command": "npx",
      "args": [
        "-y",
        "@postfleet/mcp"
      ],
      "env": {
        "POSTFLEET_API_KEY": "your-value",
        "POSTFLEET_API_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http postfleet https://api.postfleet.ai/api/mcp --header 'Authorization: Bearer {postfleet_api_key}'

Or run it on your computer

claude mcp add postfleet --env POSTFLEET_API_KEY=your-value --env POSTFLEET_API_URL=your-value -- npx -y @postfleet/mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "postfleet": {
      "url": "https://api.postfleet.ai/api/mcp",
      "headers": {
        "Authorization": "Bearer {postfleet_api_key}"
      }
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "postfleet": {
      "command": "npx",
      "args": [
        "-y",
        "@postfleet/mcp"
      ],
      "env": {
        "POSTFLEET_API_KEY": "your-value",
        "POSTFLEET_API_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "postfleet": {
      "type": "http",
      "url": "https://api.postfleet.ai/api/mcp",
      "headers": {
        "Authorization": "Bearer {postfleet_api_key}"
      }
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "postfleet": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@postfleet/mcp"
      ],
      "env": {
        "POSTFLEET_API_KEY": "your-value",
        "POSTFLEET_API_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

POSTFLEET_API_KEY secret required env
Your Postfleet API key (pf_...) from https://postfleet.ai
POSTFLEET_API_URL env
API origin override for staging or self-hosted deployments
Authorization required HTTP header
Bearer auth with your Postfleet API key.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain postfleet.ai (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1762 servers in this category
Published to the registry more recently than 28% of the other 1762 servers in this category
Basic checks equal to or better than 100% of the other 1762 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Postfleet safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: POSTFLEET_API_KEY, Authorization

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.4) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 30 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Postfleet MCP

Give an AI agent its own email address. Postfleet is email infrastructure for agents — inbound is parsed, classified, extracted to your schema, and screened for prompt injection before your agent reads a word.

This repo holds the server source and its plugin manifests. It is a mirror — the code is developed in the Postfleet application repo and published to npm as @postfleet/mcp; open issues here, send patches here, and they land upstream. The server ships two ways:


Hosted (no install)	`https://api.postfleet.ai/api/mcp`, streamable HTTP, `Authorization: Bearer pf_...`
Local (stdio)	`@postfleet/mcp` via `npx`

Get a pf_ API key at postfleet.ai.

Tools

list_mailboxes, create_mailbox, list_domains, create_domain, verify_domain, send_email, reply_email, list_inbox, read_email, wait_for_email — plus the draft lifecycle (create_draft, list_drafts, get_draft, update_draft, send_draft, delete_draft) for flows where a human approves before mail goes out. A send that lands in that gate returns 202 pending_approval, which is not a failure.

Every tool is thin-over-REST — it calls the same /api/v1/ endpoints your key already reaches (OpenAPI), so auth, scoping, and quotas are enforced once.

Install

Cursor marketplace plugin

The manifests in this repo (mcp.json, .cursor-plugin/plugin.json) declare headers.Authorization = Bearer ${POSTFLEET_API_KEY} for the hosted server and the same variable for local npx @postfleet/mcp. Installing the plugin should prompt for that key and attach it as a real Bearer header — a raw URL add without the header will 401 on initialize until a key is supplied or the hosted connect card finishes OAuth.

Cursor (manual)

"mcpServers": { "postfleet": { "url": "https://api.postfleet.ai/api/mcp", "headers": { "Authorization": "Bearer pf_your_key_here" } } } }

Local stdio (`npx -y @postfleet/mcp`)

npx -y @postfleet/mcp

Any MCP client that speaks stdio can run that command with POSTFLEET_API_KEY set:

"mcpServers": { "postfleet": { "command": "npx", "args": ["-y", "@postfleet/mcp"], "env": { "POSTFLEET_API_KEY": "pf_your_key_here" } } } }

Claude Code

claude mcp add postfleet --env POSTFLEET_API_KEY=pf_your_key_here -- npx -y @postfleet/mcp

POSTFLEET_API_URL (default https://api.postfleet.ai) overrides the API origin for staging or self-hosted deployments.

Keys

Keys are scoped — bootstrap can only create mailboxes, api covers mail operations, mcp is the one to hand a client. Use a separate key per workload so you can revoke one without breaking the rest. Never commit a key; the manifests in this repo deliberately contain none.

Build from source

npm install && npm run build   # tsup → dist/

MIT licensed.

Postfleet

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

Postfleet MCP

Tools

Install

Cursor marketplace plugin

Cursor (manual)

Local stdio (npx -y @postfleet/mcp)

Claude Code

Keys

Links

Build from source

Local stdio (`npx -y @postfleet/mcp`)