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Activitypub MCP Server

local only

Activitypub MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 121 installs a week from npm. Last commit 1 Nov 2026.

Read-only-by-default MCP server: let LLMs explore the Fediverse — Mastodon, Misskey, Pleroma.

Installs per day peak 39 · avg 13 · -16% w/w
a month agotoday
121
Installs / week
npm · activitypub-mcp
17
Stars
0 open issues
1 Nov 2026
Last commit
no releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 1 d ago · rules 995398eba69f

Evidence

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

Claims read-only, but the code runs commands src/auth/login/browser.ts:34
      const child = spawn(command, args, { stdio: "ignore", detached: true });
Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command src/auth/login/browser.ts:34
      const child = spawn(command, args, { stdio: "ignore", detached: true });
Page executes code built at runtime site/components/Search.astro:798
        this.searchContent.innerHTML = results.map(result => {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

We found things in this code

Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Activitypub MCP and you get told the day something new turns up.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add activitypub-mcp -- npx -y activitypub-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "activitypub-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "activitypub-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.activitypub-mcp]
command = "npx"
args = ["-y", "activitypub-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "activitypub-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "activitypub-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "activitypub-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "activitypub-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: ACTIVITYPUB_ENABLE_WRITES (Enable write/mutation tools (post, reply, follow, boost, block). Off by default: read-only unless set to 'true'. See SECURITY.md), LOG_LEVEL (Logging verbosity: debug, info, warn, or error).

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Activitypub MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Activitypub MCP?
Activitypub MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package activitypub-mcp was installed 121 times last week.
How do I connect Activitypub MCP?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls activitypub-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Activitypub MCP?
The npm package activitypub-mcp was installed 121 times in the last week. Week over week that is -16%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Activitypub MCP open source?
Yes — it is published under the MIT licence, written in TypeScript and 17 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.