Agent-ready local document context with stable anchors.
Read-only document awareness MCP server for agents. File AI uses Flyfish File Viewer core as the source of truth for format recognition, then turns local files into a stable profile, anchors, blocks, chunks, outline, search results, and contextual snippets so an agent can understand document content without reverse-engineering PDF, OOXML, spreadsheet, email, or archive internals.
MCP Registry name: io.github.flyfish-dev/file-ai
Use it directly with npx:
npx -y @flyfish-dev/file-ai
Or install it globally:
npm install -g @flyfish-dev/file-ai
file-ai --transport stdio
Stdio:
{
"mcpServers": {
"file-ai": {
"command": "npx",
"args": ["-y", "@flyfish-dev/file-ai"]
}
}
}
Streamable HTTP:
npx -y @flyfish-dev/file-ai --transport http --host 127.0.0.1 --port 8765
Endpoint:
http://127.0.0.1:8765/mcp
doc_analyze: parse a local file and cache a document index.doc_read: read blocks, chunks, or anchors from an existing index or path.doc_search: search cached content with source anchors.doc_context: retrieve nearby blocks around an anchor or query.doc_list_formats: list File Viewer core registry formats, all supported extensions, renderer capabilities, and File AI extractor coverage.doc://{indexId}/profiledoc://{indexId}/outlinedoc://{indexId}/chunksFile AI recognizes formats through @file-viewer/core/headless, currently covering 206 registered extensions. profile.format is therefore aligned with the same renderer selection used by Flyfish File Viewer.
Content extraction is a separate layer. File AI provides structured awareness for text/code/Markdown/JSON, PDF text, DOCX, XLSX/CSV, PPTX, EML, and archive manifests. Other File Viewer renderer-only formats such as CAD, 3D, media, image, geospatial, drawing, ebook, and data assets are still recognized in profile.format; when no structured text extractor exists yet, File AI returns a profile plus best-effort metadata/text and explicit warnings in profile.warnings and profile.extraction.
Every content block carries an anchor such as a page, slide, worksheet, row range, nested path, or byte/text location. Agents should cite returned anchorId values when making document-grounded claims.
pnpm install
pnpm build
pnpm test
pnpm validate:skill
Run locally:
pnpm dev -- --transport stdio
pnpm dev -- --transport http --port 8765
The package includes:
@flyfish-dev/file-aiserver.json.github/workflows/publish-mcp.ymlRelease flow:
git tag v0.1.0
git push origin v0.1.0
The workflow publishes the npm package first, then publishes io.github.flyfish-dev/file-ai to the official MCP Registry through GitHub OIDC. The repository must have an NPM_TOKEN secret that can publish @flyfish-dev/file-ai.
The server is read-only. It does not mutate source documents.
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y @flyfish-dev/file-aiMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"io-github-flyfish-dev-file-ai": {
"command": "npx",
"args": [
"-y",
"@flyfish-dev/file-ai"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup reference@flyfish-dev/file-ainpmFile AI works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.