string-catalog-mcp
An MCP server for working with Xcode String Catalog (.xcstrings) files. It lets AI assistants read, search, and update your iOS/macOS localization strings.
Installation
Claude Code
claude mcp add string-catalog-mcp -- npx string-catalog-mcp---
Available Tools
list_supported_languages
List all languages in a string catalog with the source language identified.
"What languages are supported in my Localizable.xcstrings file?"
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get_catalog_statistics
Get translation coverage breakdown per language, including total keys and completion percentages.
"Show me the translation statistics for my string catalog"
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get_translations_for_key
Get all translations for a specific key across all supported languages.
"Show me all translations for the 'welcome_message' key"
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search_keys
Search for localization keys containing a specific substring (case-insensitive).
"Find all keys that contain 'error' in my string catalog"
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list_all_keys
List all localization keys in the catalog (supports pagination for large catalogs).
"List all the localization keys in my project"
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update_translations
Add or update translations in the string catalog. Accepts a structured JSON payload with support for iOS format placeholders (%@, %d, %lld, %f, %1$@).
"Add German and French translations for the 'hello_world' key"
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Available Prompts
translate-strings
Generate translations for specific keys with guidance on format placeholders.
"Use the translate-strings prompt to translate 'welcome_message' and 'goodbye' into German, French, and Japanese"
batch-translate
Translate all untranslated or stale strings in a catalog for specified languages.
"Use batch-translate to add German translations for all missing strings in my catalog"
review-translations
Review existing translations for quality, consistency, and proper placeholder usage.
"Review my German translations for quality issues"
Common Workflows
Add a new language to your app
- "What languages are supported in my Localizable.xcstrings?"
- "Use batch-translate to add Spanish translations to /path/to/Localizable.xcstrings"
Translate specific strings
- "Search for keys containing 'settings' in my string catalog"
- "Show me translations for the 'settings_title' key"
- "Translate 'settings_title' and 'settings_description' into German and French"
Review translation quality
- "Show me translation statistics for my catalog"
- "Review German translations for placeholder issues and consistency"
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License
MIT
