Activitypub MCP

Fediverse Client for LLMs A lightweight Model Context Protocol (MCP) server that lets an LLM explore and interact with the existing Fediverse - Mastodon, Misskey, Foundkey, Pleroma, and compatible servers. Read-only by default; write tools are opt-in. It runs locally over stdio via the published package.

People who work with activitypub, fedify and fediverse and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-13 · ★ 17 · #171 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

MIT · TypeScript servers · how we verify → /methodology

01 · Install Activitypub MCP

before you install - you'll need

Set ACTIVITYPUB_ENABLE_WRITES, MCP_HTTP_SECRET before connecting.

Claude Code

claude mcp add cameronrye-activitypub-mcp -- npx -y activitypub-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "cameronrye-activitypub-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "activitypub-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package activitypub-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.cameronrye is GitHub-verified and matches the repo owner

03 · What Activitypub MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v3.2.1 · 2026-06-22

[3.2.1] - 2026-06-22 · Dependency maintenance and security patch release. No source or API changes - · tool names, schemas, and human-readable responses are identical to 3.2.0. · Security · undici 7.26.0 → 7.28.0…

v3.2.0 · 2026-06-17

[3.2.0] - 2026-06-16 · Structured tool output and Smithery listing improvements. No breaking changes - · tool names and the human-readable text responses are unchanged; structured output · is purely additive. · Added…

v3.1.6 · 2026-06-16

[3.1.6] - 2026-06-15 · Correctness, hardening, and docs patch from a third end-to-end review. Fixes a · silent read-path data loss, several remote-input edge cases, and a cluster of · tool-reference documentation…

04 · Who maintains Activitypub MCP

activitypub-mcp is maintained by cameronrye. We track 4 MCP servers from cameronrye - 3 actively maintained, 161 combined GitHub stars, oldest repo from Sep 2025. Full record: all servers from cameronrye.

05 · Facts

repository: github.com/cameronrye/activitypub-mcp
category: other - ranked #171 of 945 actively-maintained other servers as of 2026-09-18.
release cadence: 1 release in the last 90 days (latest 2026-06-22)
registry: io.github.cameronrye/activitypub-mcp (active, first published 2026-06-03 · 10 versions)
packages: npm:activitypub-mcp

06 · Activitypub MCP FAQ

What is Activitypub MCP?

Is Activitypub MCP still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-13 and it shipped 1 release in the last 90 days. We re-verify nightly.

How do I install Activitypub MCP?

Run `npx -y activitypub-mcp`. The README documents 2 environment variables (ACTIVITYPUB_ENABLE_WRITES, MCP_HTTP_SECRET) to set first. Set ACTIVITYPUB_ENABLE_WRITES, MCP_HTTP_SECRET before connecting. You can also paste the ready-made client config above.

Does Activitypub MCP run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Activitypub MCP

Alternatives to Activitypub MCP

Maintained other servers if Activitypub MCP isn't the fit.

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