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xcstrings_mcp

lexrus/xcstrings_mcp

A Rust implementation of a Model Context Protocol (MCP) server designed for working with Xcode.xcstrings files. It exposes the translation catalog as MCP tools and optionally serves a lightweight web editor (when enabled via environment variables) so teams can browse, search, and edit strings from a browser.

View on GitHub

Install

cargo install --path .

Client configuration

{
  "mcpServers": {
    "xcstrings": {
      "command": "/Users/you/.cargo/bin/xcstrings-mcp"
    }
  }
}

Environment variables

WEB_PORTWEB_HOST
Author
@lexrus
Category
Developer Tools, Language Translation
License
MIT
Updated
Oct 6, 2026

Features

  • Async-safe store that loads and persists Localizable.xcstrings JSON on every change

  • Optional embedded Axum web UI (enabled via environment variables) for browsing translations, filtering by query, editing values, plural/device variations, and managing comments

  • Translation progress tracking with percentage display in the language dropdown (excludes keys marked as should_translate=false)

  • Automatic discovery of.xcstrings files when no default path is provided, with a selector in the web UI for runtime catalog switching (when web UI is enabled)

  • Device-specific variations support (iPhone, iPad, Mac, Apple Watch, etc.) with mutual exclusivity logic between plural and device variations

  • Inline editing for extraction state, translation state, and substitution placeholders (including argNum, formatSpecifier, and nested plural cases)

  • JSON-first responses from all tools to make automation and debugging easier

  • Schema-backed validation using the vendored xcstrings.schema.json to keep generated catalogs consistent with Apple's format

Details on this page are taken from the project's README. Open README

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