Activitypub MCP: MCP server, setup and security

What Activitypub MCP does

According to its repository: “Explore and interact with the Fediverse via ActivityPub: WebFinger discovery, timelines and instance exploration across Mastodon, Pleroma, Misskey and more.”

An MCP server gives an AI agent extra tools it calls during the conversation: the agent reads their description, decides to use them and gets the result back. Activitypub MCP is listed under Web search and extraction, a category of 159 servers in the directory, where it ranks #95 by stars.

Topics declared by the repository: activitypub, fedify, fediverse, webfinger.

Installing and connecting Activitypub MCP

Distribution modes declared in the official MCP registry:

• npm package (Node.js, usually started with npx)

Like any MCP server, you declare it in your client's configuration (Claude Desktop, Claude Code, Cursor, VS Code, Codex…): a name, the command that starts it or its URL, and any environment variables. The client then starts it and lists its tools. Project language: TypeScript. Listed systems: macOS, Windows, Linux.

Security: what to check

An MCP server runs code with the rights you give it, and the model reads its tool descriptions: a malicious or compromised server can hijack the agent. Read the code, or pick a maintained and widely used server, before connecting it.

None of the risk signals we track (system access, secrets, missing licence, abandonment) applies to Activitypub MCP. That does not replace reading the code.

Good practice: grant only the rights needed (least privilege), require human approval for irreversible actions, and run the AI agent security check.

Project activity and maintenance

Created on September 20, 2025, the cameronrye/activitypub-mcp repository has 17 stars and 5 forks, with 0 open issues. It has more stars than 35% of the servers in the directory. Last change 1 month ago. Version published in the registry: 3.2.1 (June 22, 2026).

Stars measure attention, not quality: a recent, heavily promoted project can collect them fast, while a useful but niche server will have few.