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I1n MCP Server

@Pakvothe

Repository

Basic information

Category

Developer Tools

Transports

stdio

Author

Pakvothe

Submitted by

Franco Ortiz

About I1n MCP Server

Localization as code — 7 MCP tools to push, pull, translate, extract strings, and search translations. AI-powered, type-safe, 182 languages.

#i18n#localization#translation#ai#typescript#mcp#cursor#claude-code#developer-tools

I1n MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "i1n": {
      "command": "npx",
      "args": [
        "i1n",
        "mcp"
      ]
    }
  }
}

I1n MCP Server tools

9

Get project status including plan, limits, languages, and configuration

Pull translations from i1n and generate TypeScript types

Push local translation files to i1n (with diff detection, only changed keys are pushed)

Validate local translation files offline: missing keys per language, broken interpolation placeholders, empty values, and coverage. Returns a JSON report. Safe for CI — no API calls.

Translate to specified languages with AI. Estimates cost, translates, polls for completion, and auto-pulls results.

Add new languages to the project and optionally auto-translate existing keys

Accept extracted strings, push them to i1n, translate to all active languages, and pull updated types. Pass an array of {key, value, namespace?} objects.

Search existing translations by key name, namespace, or source value

Detect any i18n library (i18next, vue-i18n, next-intl, react-intl, etc.) and configure i1n bridge mode in this project — end-to-end, with no terminal needed. Use when the user asks to 'set up / configure the bridge', 'wire up i1n with my existing i18n library', or 'install i1n on top of <library>'. If `i1n.config.json` doesn't exist yet, pass `apiKey` (and optionally `projectId`) and the tool runs init non-interactively (validate, pick project, write config) before wiring the bridge. If `apiKey` is missing, the tool returns status `needs_api_key` so you can ask the user for it. If multiple projects exist, it returns status `multiple_projects` with the list — re-call with the chosen `projectId`. Pass `write=true` to actually write the bridge helper file (do this whenever the user asks to *configure*/*install*; only leave it false if they explicitly asked to *analyze* or *preview*). For libraries outside the known list, the tool still emits a best-effort snippet flagged for verification.

Overview

What is I1n?

I1n is a Model Context Protocol server that enables localization as code, translating apps to any language using a single CLI command with AI assistance. It is designed for developers who want to automate internationalization workflows.

How to use I1n?

Add the server to your MCP configuration using the npx i1n mcp command, then invoke its tools via an AI agent. No further setup is required beyond the JSON configuration.

Key features of I1n

  • 7 tools: status, push, pull, translate, add language, extract/translate, search
  • Free forever with support for 182 languages
  • AI agent can extract, push, translate, and generate TypeScript types automatically
  • Automatic diff detection on push
  • One‑step extract, push, and translate workflow

Use cases of I1n

  • Tell an AI agent “internationalize this component” and it completes the full pipeline
  • Automatically translate new strings across all active languages with a single command
  • Search existing translation keys by name or value for maintenance

Frequently asked questions

1

What does I1n do?

I1n provides localization as code, using AI to translate application text to any language via a single command.

2

How do I install I1n?

Add the following to your MCP servers configuration: `"command": "npx", "args": ["i1n", "mcp"]`.

3

How many languages does I1n support?

I1n supports 182 languages and is free forever.

4

What tools does I1n provide?

It offers 7 tools: `i1n_status`, `i1n_push`, `i1n_pull`, `i1n_translate`, `i1n_add_language`, `i1n_extract_and_translate`, and `i1n_search`.

5

Is I1n free to use?

Yes, I1n is free forever with no mention of paid tiers.

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