# TypeFox/monaco-languageclient

A toolbox for building web applications with editors utilizing language servers.

Repository: https://github.com/TypeFox/monaco-languageclient
Canonical: https://ross.abutalabs.com/products/monaco-languageclient
Homepage: https://typefox.github.io/monaco-languageclient/
Language: TypeScript
License: MIT
License Family: permissive
Topics: language-server, monaco-editor, language-server-protocol, lsp, vscode, monaco
Last push: 2026-07-31T22:12:16+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 35, longevity 100
- inputs: {"age_days": 3430, "days_push": 33, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1361, forks 216 (observed 2026-08-28T04:04:30.143212+00:00)

## What it is
A set of npm packages that connect the Monaco editor to language servers via the Language Server Protocol, including JSON-RPC over WebSocket communication and a React wrapper component. It enables building web-based code editors with rich language features like completion, diagnostics, and hover information.

## Use cases
- add language server features to monaco editor in a web app
- embed a code editor with autocomplete and diagnostics in react
- connect monaco editor to a language server over websocket
- build a browser-based IDE for a custom DSL
- run a language server in a web worker for in-browser editing

## When to choose
- you want Monaco editor with full LSP features in a web application
- you need JSON-RPC communication with a language server over WebSocket
- you want a ready-made React component wrapping Monaco with language client support

## When to avoid
- you need a full VS Code-like IDE rather than a single editor component
- your project does not use Monaco editor or the Language Server Protocol
- you need a desktop-only editor without a web frontend

## Facets
- artifact type: library
- maturity: active
- function: rpc, websocket, editor, plugin-system, developer-tools
- domain: web-development, frontend, developer-tools, text-editors, apis
- platform: browser, cross-platform
- tags: monaco-editor, language-server-protocol, lsp, rpc, react, typescript, web-editor, web-server, nodejs

## Member repositories
- TypeFox/monaco-languageclient (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:30.143212+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:41:34.108096+00:00, confidence not recorded.
  - readme: https://github.com/TypeFox/monaco-languageclient (fetched 2026-08-28T04:04:30.143212+00:00, sha d58b47f5c6e9)
  - homepage: https://typefox.github.io/monaco-languageclient/ (fetched 2026-08-29T11:59:35.017373+00:00, sha ec54da5c264e)
- Data as of 2026-08-30T08:39:29.467469+00:00.