filechanger-mcp

filechanger-mcp

MCP server for FileChanger, giving an AI assistant the ability to convert documents between formats. Markdown to HTML, LaTeX to Typst, DocBook to AsciiDoc, RST to Jira markup, and a few hundred other pairs.

Conversion runs on FileChanger's servers (pandoc under the hood), so there is nothing to install locally beyond this package.

Setup

Get an API key (fc_...) at filechanger.io.

Claude Code:

claude mcp add filechanger -e FILECHANGER_API_KEY=fc_your_key_here -- npx -y filechanger-mcp

Any other MCP client, add to your config:

{
  "mcpServers": {
    "filechanger": {
      "command": "npx",
      "args": ["-y", "filechanger-mcp"],
      "env": { "FILECHANGER_API_KEY": "fc_your_key_here" }
    }
  }
}

Tools

Tool	Arguments	Returns
convert	content, from, to (all required)	The converted document as text
list_formats	none	Supported input and output formats
docs	none	The FileChanger API documentation as markdown

Formats are named as you would expect: markdown, gfm, commonmark, html, latex, typst, rst, docbook, org, mediawiki, dokuwiki, jira, textile, djot, json, csv, tsv, native. A couple are output-only, notably asciidoc and plain. Call list_formats for the authoritative lists, they are what the server actually validates against.

Once configured, you can just ask: "convert this LaTeX to Typst", and the assistant picks the tool up on its own.

Binary formats

convert handles text formats only. Binary targets (docx, epub, odt, pdf, and the audio/video/image formats) are not available over MCP because the tool result has to be text. Use the REST jobs API for those.

Configuration

Variable	Required	Default
FILECHANGER_API_KEY	yes	none, the server exits with an error without it
FILECHANGER_URL	no	https://filechanger.io/mcp

FILECHANGER_URL is there for self-hosted or staging deployments. This package is a thin stdio proxy: it forwards JSON-RPC to that endpoint and streams the response back.

Links

• filechanger.io
• API documentation
• Supported format pairs
• Pricing

MIT licensed.