# How to integrate Crowdin MCP with Claude Code

```json
{
  "title": "How to integrate Crowdin MCP with Claude Code",
  "toolkit": "Crowdin",
  "toolkit_slug": "crowdin",
  "framework": "Claude Code",
  "framework_slug": "claude-code",
  "url": "https://composio.dev/toolkits/crowdin/framework/claude-code",
  "markdown_url": "https://composio.dev/toolkits/crowdin/framework/claude-code.md",
  "updated_at": "2026-05-06T08:07:38.198Z"
}
```

## Introduction

Manage your Crowdin directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.
You can do this in two different ways:
- Via [Composio Connect](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=composio_connect&next=%2F~%2Forg%2Fconnect%2Fclients%2Fclaude-code) - Direct and easiest approach
- Via [Composio SDK](https://docs.composio.dev/docs?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=composio_sdk) - Programmatic approach with more control

## Also integrate Crowdin with

- [OpenAI Agents SDK](https://composio.dev/toolkits/crowdin/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/crowdin/framework/claude-agents-sdk)
- [Claude Cowork](https://composio.dev/toolkits/crowdin/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/crowdin/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/crowdin/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/crowdin/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/crowdin/framework/cli)
- [Google ADK](https://composio.dev/toolkits/crowdin/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/crowdin/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/crowdin/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/crowdin/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/crowdin/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/crowdin/framework/crew-ai)

## TL;DR

- Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
- Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Handling Large tool responses out of LLM context to minimize context rot.
- Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

## Connect Crowdin to Claude Code

### Connecting Crowdin to Claude Code using Composio
1. Add the Composio MCP to Claude

```bash
claude mcp add --scope user --transport http composio https://connect.composio.dev/mcp
```

## What is Claude Code?

Claude Code is Anthropic's command line developer tool that lets you use Claude directly inside your terminal. Instead of switching between your editor, browser, and chat, you can stay in your project folder and ask Claude to help you build, debug, refactor, and understand code right where you're working.
Key features include:
- Terminal-Native Experience: Work with Claude directly in your command line without switching contexts
- MCP Support: Built-in support for Model Context Protocol servers to extend Claude's capabilities
- Project Context: Claude understands your project structure and can read, write, and modify files
- Interactive Development: Ask questions, debug code, and get help in real-time while coding
- Multi-Platform: Works on macOS, Linux, WSL, and Windows

## What is the Crowdin MCP server, and what's possible with it?

The Crowdin MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Crowdin account. It provides structured and secure access to your localization projects, so your agent can manage branches, organize files, label content, automate webhooks, and orchestrate translation workflows on your behalf.
- Branch and project management: Easily have your agent create, delete, or organize Crowdin projects and branches to streamline new releases or features.
- Dynamic file handling: Let your agent add new files to projects, ensuring your translation assets are always up to date and properly organized by branch or directory.
- Labeling and content categorization: Direct your agent to create, assign, or remove labels on resources and strings, helping you segment and track translation tasks with precision.
- Workflow automation with webhooks: Automate your translation process by having the agent set up or remove webhooks for real-time notifications and integrations.
- Resource cleanup and maintenance: Empower your agent to delete obsolete branches, labels, webhooks, or entire projects, keeping your Crowdin workspace clean and focused.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `CROWDIN_ADD_BRANCH` | Add Branch | Tool to create a new branch in a crowdin project. use when you need to isolate translations for a new feature or release. |
| `CROWDIN_ADD_FILE` | Add File | Tool to add a new file to a crowdin project. use after uploading the file to storage to place it under the specified project, branch, or directory. |
| `CROWDIN_ADD_LABEL` | Add Label | Tool to create a new label in a crowdin project. use when you need to tag resources with a custom identifier, such as 'sprint-5'. |
| `CROWDIN_ADD_PROJECT` | Create Crowdin Project | Tool to create a new project in crowdin. use before uploading source files to initialize translation workflows. |
| `CROWDIN_ADD_WEBHOOK` | Add Webhook | Tool to create a new webhook in a crowdin project. use after confirming the project id and desired event triggers. |
| `CROWDIN_ASSIGN_LABEL_TO_STRINGS` | Assign Label to Strings | Tool to assign the specified label to provided string ids in a project. use after creating the label or verifying string ids to categorize content. |
| `CROWDIN_DELETE_BRANCH` | Delete Branch | Tool to delete a specific branch from a crowdin project. use when you need to remove an obsolete branch after it's fully merged. |
| `CROWDIN_DELETE_LABEL` | Delete Label | Tool to delete the label identified by the specified label id in a project. use when you need to remove outdated or incorrect labels. ensure no resources reference the label before deletion. |
| `CROWDIN_DELETE_PROJECT` | Delete Project | Tool to delete a crowdin project by its id. use when you need to permanently remove a project after confirming no further usage. ensure all resources are no longer needed before deletion. |
| `CROWDIN_DELETE_WEBHOOK` | Delete Webhook | Tool to delete the webhook identified by the specified webhook id in a crowdin project. use when you need to remove obsolete or incorrect webhooks after confirming project and webhook ids. |
| `CROWDIN_EDIT_FILE` | Edit File | Tool to update file details in a project. use after confirming valid project and file ids. |
| `CROWDIN_EDIT_LABEL` | Edit Label | Tool to edit a label in a crowdin project. use when you need to update the name or description of an existing label. ensure the label exists before using. example: edit label 42 to 'release-1.1'. |
| `CROWDIN_EDIT_PROJECT` | Edit Project | Tool to update project details using json-patch. use after confirming project settings to modify metadata like name, description, visibility, or languages. |
| `CROWDIN_EDIT_STRING` | Edit String | Tool to update string details in a crowdin project. use when you need to modify a string's text or metadata after creation. |
| `CROWDIN_GET_LABEL` | Get Label | Tool to retrieve information about the label identified by the specified label id in a project. use after confirming the project context to fetch label details. |
| `CROWDIN_GET_LANGUAGE` | Get Language | Tool to retrieve details of a specific language. use when you have a language identifier and need locale codes and plural rules before configuring translations. |
| `CROWDIN_GET_MEMBER_INFO` | Get Member Info | Tool to retrieve information about a project member. use when you need to inspect details for a specific user within a project after obtaining their member id. |
| `CROWDIN_GET_PROJECT` | Get Project | Tool to retrieve details of a specific crowdin project. use when you need to inspect project settings before making updates. |
| `CROWDIN_GET_STRING` | Get String | Tool to retrieve details of a specific string in a crowdin project. use after confirming the project and string ids to fetch its metadata. |
| `CROWDIN_GET_WEBHOOK` | Get Webhook | Tool to retrieve information about the webhook identified by the specified webhook id in a project. use after confirming the project context to fetch webhook details. |
| `CROWDIN_LIST_BRANCHES` | List Branches | Tool to list all branches in a crowdin project. use after selecting a project to view its branch structure. supports pagination and optional filtering by branch id. |
| `CROWDIN_LIST_FILES` | List Files | Tool to list files in a crowdin project. use when you need to retrieve a list of project files with optional filters by directory, group, or branch before processing. |
| `CROWDIN_LIST_LABELS` | List Labels | Tool to list labels in a crowdin project. use when you need to retrieve all labels for a specific project with optional pagination. |
| `CROWDIN_LIST_LANGUAGES` | List Languages | Tool to retrieve a list of supported languages. use when you need to fetch all languages crowdin supports before starting localization. |
| `CROWDIN_LIST_PROJECT_MEMBERS` | List Project Members | Tool to list members in a crowdin project. use when you need to retrieve project member list for management tasks after confirming the project id. |
| `CROWDIN_LIST_PROJECTS` | List Projects | Tool to retrieve a list of all crowdin projects with optional filters. use when you need to paginate through or filter projects by owner, group, language inclusion, or archive status. |
| `CROWDIN_LIST_REPORTS` | List Reports | Tool to list reports for a given crowdin project. use after confirming project id to retrieve available reports. supports pagination via limit and offset. |
| `CROWDIN_UPLOAD_STORAGE` | Upload Storage | Tool to upload a file to crowdin storage. use when you need to obtain a storageid for further operations like adding files to a project. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Crowdin MCP server is an implementation of the Model Context Protocol that connects Claude Code (and other AI assistants like Claude and Cursor) directly to your Crowdin account. It provides structured and secure access so Claude can perform Crowdin operations on your behalf.
With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster.

## Step-by-step Guide

### 1. Prerequisites

Before starting, make sure you have:
- Claude Pro, Max, or API billing enabled Anthropic account
- Composio API Key
- A Crowdin account
- Basic knowledge of Python or TypeScript

### 1. Install Claude Code

To install Claude Code, use one of the following methods based on your operating system:
```bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd
```

### 2. Set up Claude Code

Open a terminal, go to your project folder, and start Claude Code:
- Claude Code will open in your terminal
- Follow the prompts to sign in with your Anthropic account
- Complete the authentication flow
- Once authenticated, you can start using Claude Code
```bash
cd your-project-folder
claude
```

### 3. Set up environment variables

Create a .env file in your project root with the following variables:
- COMPOSIO_API_KEY authenticates with Composio (get it from [Composio dashboard](https://dashboard.composio.dev/login?utm_source=toolkits&utm_medium=framework_template&utm_campaign=claude-code&utm_content=api_key&next=%2F~%2Forg%2Fconnect%2Fclients%2Fclaude-code))
- USER_ID identifies the user for session management (use any unique identifier)
```bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
```

### 4. Install Composio library

No description provided.
```python
pip install composio-core python-dotenv
```

```typescript
npm install @composio/core dotenv
```

### 5. Generate Composio MCP URL

No description provided.
```python
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["crowdin"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http crowdin-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')
```

```typescript
import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['crowdin'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http crowdin-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);
```

### 6. Run the script and copy the MCP URL

No description provided.
```python
python generate_mcp_url.py
```

```typescript
node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts
```

### 7. Add Crowdin MCP to Claude Code

In your terminal, add the MCP server using the command from the previous step. The command format is:
- claude mcp add registers a new MCP server with Claude Code
- --transport http specifies that this is an HTTP-based MCP server
- The server name (crowdin-composio) is how you'll reference it
- The URL points to your Composio Tool Router session
- --headers includes your Composio API key for authentication
After running the command, close the current Claude Code session and start a new one for the changes to take effect.
```bash
claude mcp add --transport http crowdin-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude
```

### 8. Verify the installation

Check that your Crowdin MCP server is properly configured.
- This command lists all MCP servers registered with Claude Code
- You should see your crowdin-composio entry in the list
- This confirms that Claude Code can now access Crowdin tools
If everything is wired up, you should see your crowdin-composio entry listed:
```bash
claude mcp list
```

### 9. Authenticate Crowdin

The first time you try to use Crowdin tools, you'll be prompted to authenticate.
- Claude Code will detect that you need to authenticate with Crowdin
- It will show you an authentication link
- Open the link in your browser (or copy/paste it)
- Complete the Crowdin authorization flow
- Return to the terminal and start using Crowdin through Claude Code
Once authenticated, you can ask Claude Code to perform Crowdin operations in natural language. For example:
- "Create a new Crowdin project for our app"
- "Add new source file to the translations project"
- "Assign sprint label to specific string IDs"

## Complete Code

```python
import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["crowdin"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http crowdin-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')
```

```typescript
import 'dotenv/config';
import { Composio } from '@composio/core';

const { COMPOSIO_API_KEY, USER_ID } = process.env;

if (!COMPOSIO_API_KEY || !USER_ID) {
  throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}

const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });

const composioSession = await composioClient.create(USER_ID, {
  toolkits: ['crowdin'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http crowdin-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);
```

## Conclusion

You've successfully integrated Crowdin with Claude Code using Composio's MCP server. Now you can interact with Crowdin directly from your terminal using natural language commands.
Key features of this setup:
- Terminal-native experience without switching contexts
- Natural language commands for Crowdin operations
- Secure authentication through Composio's managed MCP
- Tool Router for dynamic tool discovery and execution
Next steps:
- Try asking Claude Code to perform various Crowdin operations
- Add more toolkits to your Tool Router session for multi-app workflows
- Integrate this setup into your development workflow for increased productivity
You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

## How to build Crowdin MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/crowdin/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/crowdin/framework/claude-agents-sdk)
- [Claude Cowork](https://composio.dev/toolkits/crowdin/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/crowdin/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/crowdin/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/crowdin/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/crowdin/framework/cli)
- [Google ADK](https://composio.dev/toolkits/crowdin/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/crowdin/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/crowdin/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/crowdin/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/crowdin/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/crowdin/framework/crew-ai)

## Related Toolkits

- [Apilio](https://composio.dev/toolkits/apilio) - Apilio is a home automation platform that lets you connect and control smart devices from different brands. It helps you build flexible automations with complex conditions, schedules, and integrations.
- [Basin](https://composio.dev/toolkits/basin) - Basin is a no-code form backend for quickly setting up reliable contact forms. It lets you collect and manage form submissions without writing any server-side code.
- [Bouncer](https://composio.dev/toolkits/bouncer) - Bouncer is an email validation platform that verifies the authenticity of email addresses in real-time and batch. It helps boost deliverability and reduce bounce rates for your communications.
- [Conveyor](https://composio.dev/toolkits/conveyor) - Conveyor is a platform that automates security reviews with a Trust Center and AI-driven questionnaire automation. It streamlines compliance and vendor security processes for faster, hassle-free reviews.
- [Databox](https://composio.dev/toolkits/databox) - Databox is a business analytics platform that connects your data from any tool and device. It helps you track KPIs, build dashboards, and discover actionable insights.
- [Detrack](https://composio.dev/toolkits/detrack) - Detrack is a delivery management platform for real-time tracking and proof of delivery. It helps businesses automate notifications and keep customers updated every step of the way.
- [Dnsfilter](https://composio.dev/toolkits/dnsfilter) - Dnsfilter is a cloud-based DNS security and content filtering solution. It helps organizations block online threats and manage safe internet access with ease.
- [Faraday](https://composio.dev/toolkits/faraday) - Faraday lets you embed AI in workflows across your stack for smarter automation. It boosts your favorite tools with actionable intelligence and seamless integration.
- [Feathery](https://composio.dev/toolkits/feathery) - Feathery is an AI-powered platform for building dynamic data intake forms with advanced logic. It helps teams automate complex workflows and collect structured data with ease.
- [Fillout forms](https://composio.dev/toolkits/fillout_forms) - Fillout forms is an online platform for building and managing forms with a flexible API. It lets you create, distribute, and collect responses from forms with ease.
- [Formdesk](https://composio.dev/toolkits/formdesk) - Formdesk is an online form builder for creating and managing professional forms. It's perfect for collecting data, automating workflows, and integrating form submissions with your favorite services.
- [Formsite](https://composio.dev/toolkits/formsite) - Formsite lets you build online forms and surveys with drag-and-drop simplicity. Capture, manage, and integrate form responses securely for streamlined workflows.
- [Graphhopper](https://composio.dev/toolkits/graphhopper) - GraphHopper is an enterprise-grade Directions API for routing, optimization, and geocoding across multiple vehicle types. It enables fast, reliable route planning and logistics automation for businesses.
- [Hyperbrowser](https://composio.dev/toolkits/hyperbrowser) - Hyperbrowser is a next-generation platform for scalable browser automation. It empowers AI agents to interact with web apps, automate workflows, and handle browser sessions at scale.
- [La Growth Machine](https://composio.dev/toolkits/lagrowthmachine) - La Growth Machine automates multi-channel sales outreach and routine tasks for sales teams. Streamline your workflow and focus on closing more deals.
- [Leverly](https://composio.dev/toolkits/leverly) - Leverly is a workflow automation platform that connects and coordinates actions across your apps. It streamlines repetitive processes so your business runs smoother, faster, and with fewer manual steps.
- [Maintainx](https://composio.dev/toolkits/maintainx) - Maintainx is a cloud-based CMMS for centralizing maintenance data, communication, and workflows. It helps organizations streamline maintenance operations and improve team coordination.
- [Make](https://composio.dev/toolkits/make) - Make is an automation platform that connects your favorite apps and services. Build powerful, custom workflows without writing code.
- [Ntfy](https://composio.dev/toolkits/ntfy) - Ntfy is a notification service to send push messages to phones or desktops. Instantly deliver alerts and updates to users, devices, or teams.
- [Persona](https://composio.dev/toolkits/persona) - Persona offers identity infrastructure to automate user verification and compliance. It helps organizations securely verify users and reduce fraud risk.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Crowdin MCP?

With a standalone Crowdin MCP server, the agents and LLMs can only access a fixed set of Crowdin tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Crowdin and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Claude Code?

Yes, you can. Claude Code fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Crowdin tools.

### Can I manage the permissions and scopes for Crowdin while using Tool Router?

Yes, absolutely. You can configure which Crowdin scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Crowdin data and credentials are handled as safely as possible.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)