Fitter: MCP server, setup and security

What Fitter does

According to its repository: “Turn any website or API into structured JSON with LLM-authored declarative scraping configs.”

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. Fitter is listed under Developer tools, a category of 475 servers in the directory, where it ranks #159 by stars.

Topics declared by the repository: api, go, parsing, scraper, scrawler, golang.

Installing and connecting Fitter

Distribution modes declared in the official MCP registry:

• MCPB bundle (one-click install in Claude Desktop)
• Docker (OCI) image

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: Go.

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 Fitter. 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 February 5, 2023, the PxyUp/fitter repository has 133 stars and 10 forks, with 1 open issues. It has more stars than 71% of the servers in the directory. Last change 2 months ago. Version published in the registry: 1.8.3 (August 26, 2026).

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