fittok

About

fittok parses a repository with tree-sitter into a graph of functions, classes and methods (Python, JS, JSX, TS, TSX, Java, Go, Rust). It ranks nodes against a question using semantic embeddings, BM25, structural matching and PageRank, then returns the actual source of the selected code plus a codebase map.

It runs locally over stdio as a PyPI package, started with uvx fittok (or python -m fittok, or pipx run fittok). No sign-in or API key is needed. Graphs and embeddings are cached under ~/.cache/fittok, and a file watcher updates the graph as files change. The same install also provides a CLI, a Python library and a Claude Code plugin.

What you can do

• Retrieve relevant code for a question within a token budget
• Parse repos into a function and class graph with tree-sitter
• Rank code by embeddings, BM25 and PageRank
• Return a codebase map with docstrings for follow-up routing
• Update the graph incrementally as files change
• Reset the cached graph with reset_graph

Tools

Local servers list their tools once they’re running, and this one doesn’t publish its list in advance. Your client shows them after you add it.

Example prompts

• How does the query execution path work in this codebase?

• Find the code that handles user authentication and show it.

• Trace how a request moves from the UI to the database.

• Show me the functions related to the sandbox isolation logic.

Set up

Every client starts fittok on your machine with the same command. Pick yours; the page remembers your choice.

claude mcp add --transport stdio fittok -- uvx fittok

{
  "mcpServers": {
    "fittok": {
      "command": "uvx",
      "args": [
        "fittok"
      ]
    }
  }
}

{
  "mcpServers": {
    "fittok": {
      "command": "uvx",
      "args": [
        "fittok"
      ]
    }
  }
}

code --add-mcp '{"name":"fittok","type":"stdio","command":"uvx","args":["fittok"]}'

{
  "servers": {
    "fittok": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "fittok"
      ]
    }
  }
}

{
  "mcpServers": {
    "fittok": {
      "command": "uvx",
      "args": [
        "fittok"
      ]
    }
  }
}

codex mcp add fittok -- uvx fittok

[mcp_servers.fittok]
command = "uvx"
args = ["fittok"]

gemini mcp add fittok uvx fittok

{
  "mcpServers": {
    "fittok": {
      "command": "uvx",
      "args": [
        "fittok"
      ]
    }
  }
}

Embed

Show fittok in a README or on your site. Each embed links to this page, uses the server’s own install command, and sets no cookies. How embeds work

The card, the iframe and the JSON are in English. Add ?lang=it, fr, de or es to their address for another language.

README badge Website card iframe JSON AI prompt

README badge

Markdown

[![fittok on mcp.tc](https://mcp.tc/i/fittok/badge.svg)](https://mcp.tc/i/fittok)

HTML

<a href="https://mcp.tc/i/fittok"><img src="https://mcp.tc/i/fittok/badge.svg" alt="fittok on mcp.tc" height="20"></a>

It follows the reader’s light or dark mode. Add ?theme=light or ?theme=dark to fix it, or ?style=compact to show the mark without the word.

Website card

HTML

<script src="https://mcp.tc/w/fittok.js" async></script>

The card appears where the tag is. Add data-theme="dark" or data-size="compact" to the tag to change it. The file holds everything it needs, so it makes no other requests and sets no cookies.

iframe

HTML

<iframe src="https://mcp.tc/embed/fittok" title="fittok on mcp.tc" width="420" height="200" loading="lazy" allow="clipboard-write" style="border:0;border-radius:8px;max-width:100%"></iframe>

Use it on pages that don’t allow scripts. Add ?theme=light or ?theme=dark to the address to fix the colors.

JSON

The listing as data for your own pages and tools: name, tagline, install command, tools and the “Add to” links. Any site can read it (CORS is open).

https://mcp.tc/i/fittok.json

What each field means

AI prompt

Paste this into an AI coding assistant, such as Claude Code or Cursor, and it adds the fittok card to your site.

Markdown

Add the mcp.tc card for fittok, an MCP server, to my website. It is one static script: no build step, no package to install, no cookies.

Put this tag where the card should appear. The card renders right before it:

```html
<script src="https://mcp.tc/w/fittok.js" async></script>
```

To show the card somewhere else, put this placeholder there and load the same script once, for example before `</body>`. Keep the link inside: visitors without JavaScript see it.

```html
<div data-mcptc="fittok"><a href="https://mcp.tc/i/fittok">fittok on mcp.tc</a></div>
```

Options:
- `data-theme="light"` or `"dark"` on the tag or the placeholder fixes the colors. Without it, the card follows the visitor’s light or dark mode.
- `data-size="compact"` gives a smaller card without the tagline.
- The CSS variable `--mcptc-max-width` on the placeholder or a parent sets the width (default `520px`).
- `?lang=` on the script URL sets the card’s language: `en`, `it`, `fr`, `de` or `es`.

If the site has a Content Security Policy, allow `script-src https://mcp.tc` and `img-src data:` (the icon is inline).

For a README or other Markdown docs, use the badge instead:

```markdown
[![fittok on mcp.tc](https://mcp.tc/i/fittok/badge.svg)](https://mcp.tc/i/fittok)
```

Reference: https://mcp.tc/embed

Change history

This server runs on your computer, so we follow its PyPI package: each new version shows up here, with edits by its owner.

1. 6 Oct 2026, 21:21 UTC, Automatic check

   Tracking started: version 0.11.1.

FAQ