Ai MCP Server

MCP Server that turns your AI agent into a localization expert with token-efficient i18n translation

Local serverstdioTypeScript

What is the Ai MCP server?

If you already use Ai, the ai mcp server is the piece that lets your assistant work with it directly. MCP Server that turns your AI agent into a localization expert with token-efficient i18n translation.

What the server does

AI-powered translation for app localization. Automatically translate your i18n files to 165 languages using AI. Supports JSON, JSONC, Flutter ARB, YAML, PO, XLIFF, and all other text-based localization formats with intelligent project structure detection.

  • 🤖 165 languages — context-aware AI translation, not word-by-word machine output
  • 🎯 Any text-based format — JSON, JSONC, Flutter ARB, Shopify themes, YAML, PO (gettext), XLIFF, and more (full list)
  • 📁 Zero setup — target languages are auto-detected from your file and folder layout
  • 🔄 Incremental by default — --update translates only new and changed strings and leaves the rest untouched
  • 🛠️ Nothing breaks — placeholders, HTML tags, and formatting are preserved; dates and numbers are localized; proper names, URLs, and technical terms are left alone (how it works)
  • 🌐 Correct plural forms — every i18next suffix is generated, including complex rules in Russian, Arabic, and Polish

Available tools

The toolset is worth reading before you wire it up, because it tells you what the integration is really for:

  • Jenkins — stages { stage('Translate') { steps { sh 'npm install' sh 'npx ai-l10n translate ./locales/en.json --update' } } } }
  • Terminology — Use terminology to enforce consistent terms across translations. List synonyms that should be replaced by the preferred term:

Credentials and setup notes

Configuration is passed through the environment: L10N_API_KEY, YOUR_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

Installation

Installation goes through your MCP client rather than a global install: point it at ai-l10n on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.

Where it fits

Among the payments and commerce options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Ai's toolset — Jenkins, Terminology — is a fair guide to whether it matches your workflow. It is maintained by l10n-dev; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Worth knowing first

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
Jenkinsstages { stage('Translate') { steps { sh 'npm install' sh 'npx ai-l10n translate ./locales/en.json --update' } } } }
TerminologyUse terminology to enforce consistent terms across translations. List synonyms that should be replaced by the preferred term:

How to install the Ai MCP server

{
  "mcpServers": {
    "ai-l10n": {
      "command": "npx",
      "args": ["-y", "ai-l10n"],
      "env": {
        "L10N_API_KEY": "your-value",
        "YOUR_API_KEY": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

VariableDescriptionRequired
L10N_API_KEYCredential the server authenticates with.Yes
YOUR_API_KEYCredential the server authenticates with.Yes

Example prompts to try

  • Use Ai to Jenkins.
  • Use Ai to Terminology.

Frequently asked questions

It connects Ai to MCP-compatible AI assistants such as Claude and Cursor, exposing 2 tools (Jenkins, Terminology) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Ai directly.