Postbag MCP

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: Runs on your computer
• Transport: stdio
• Category: Other
• You need to fill in: POSTBAG_API_KEY

Install

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

You need

• npmNode.js installed (for the npx command)

Which app do you use?

{
  "mcpServers": {
    "postbag": {
      "command": "npx",
      "args": [
        "-y",
        "@postbag/mcp"
      ],
      "env": {
        "POSTBAG_API_KEY": "your-value",
        "POSTBAG_API_URL": "your-value"
      }
    }
  }
}

claude mcp add postbag --env POSTBAG_API_KEY=your-value --env POSTBAG_API_URL=your-value -- npx -y @postbag/mcp

{
  "mcpServers": {
    "postbag": {
      "command": "npx",
      "args": [
        "-y",
        "@postbag/mcp"
      ],
      "env": {
        "POSTBAG_API_KEY": "your-value",
        "POSTBAG_API_URL": "your-value"
      }
    }
  }
}

{
  "servers": {
    "postbag": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@postbag/mcp"
      ],
      "env": {
        "POSTBAG_API_KEY": "your-value",
        "POSTBAG_API_URL": "your-value"
      }
    }
  }
}

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

Values you fill in

• POSTBAG_API_KEY secret required env
  A Postbag API key (pb_live_… or pb_test_…). Mint one at https://postbag.dev/app or with `postbag login`.
• POSTBAG_API_URL env
  Base URL of the Postbag API. Defaults to https://postbag.dev — set this only for a self-hosted instance.

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 postbag.dev (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 applicable

  Endpoint responds

  This one runs on your computer; there is no internet endpoint

• – Not applicable

  Sign-in with OAuth

  Runs on your computer and uses local settings instead

• … Not checked yet

  No hidden instructions in tool descriptions

  Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

• More stars than 0% of the other 32476 servers in this category
• Published to the registry more recently than 29% of the other 32476 servers in this category
• Basic checks equal to or better than 100% of the other 32476 servers in this category

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

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

README from the maker

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