What kind of Lokalise API token do I need for this integration?

You need a Personal Access Token from your Lokalise account. Go to your profile settings, find the API Tokens section, and generate a new token with read/write access to projects. Keep this token secure as it grants full API access to your account.

How do I add a new translation key to my Lokalise project via the AI agent?

Use the `create_key` action with the project ID, key name (e.g., `homepage.welcome.title`), and optionally specify platforms, tags, and a description. The key will be created with the base language placeholder ready for translation.

Can I export all my translations in a specific format like JSON or YAML?

Yes! Use the `download_file` action and specify the `format` parameter (e.g., `json`, `yml`, `xliff`, `strings`, `xml`). You can also filter by specific languages or filenames to generate targeted export bundles.

Is it possible to add translations programmatically for multiple languages at once?

Yes. The `add_translation` action supports adding translations for one or more keys at once. You can also mark translations as fuzzy or reviewed to indicate their quality status in the workflow.

Lokalise MCP Server for LangChain 13 tools — connect in under 2 minutes

Name: Lokalise
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 13 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Lokalise through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "lokalise": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Lokalise, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Lokalise MCP Server

Connect your Lokalise account to any AI agent and take full control of your translation and localization workflows through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Lokalise through native MCP adapters. Connect 13 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Project Management — List all translation projects, fetch detailed project metadata, and create new projects directly from the API
Key Management — Query translation keys with filters by platform, tags, or filenames, plus create and update keys programmatically
Translation Operations — Fetch translations for any key, add new translations with review/fuzzy flags, and manage multi-language content
File Import/Export — Upload localization files (JSON, YAML, XLIFF) and generate download bundles in any supported format
Team & Orders — List team members and their roles, plus inspect professional translation orders

The Lokalise MCP Server exposes 13 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Lokalise to LangChain via MCP

Follow these steps to integrate the Lokalise MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 13 tools from Lokalise via MCP

Why Use LangChain with the Lokalise MCP Server

LangChain provides unique advantages when paired with Lokalise through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Lokalise MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Lokalise queries for multi-turn workflows

Lokalise + LangChain Use Cases

Practical scenarios where LangChain combined with the Lokalise MCP Server delivers measurable value.

RAG with live data: combine Lokalise tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Lokalise, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Lokalise tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Lokalise tool call, measure latency, and optimize your agent's performance

Lokalise MCP Tools for LangChain (13)

These 13 tools become available when you connect Lokalise to LangChain via MCP:

add_translation

Add translations to one or more keys

create_key

Create translation keys in a Lokalise project

create_project

Create a new Lokalise project

download_file

Generate a download bundle of translations

get_project

Get details of a specific Lokalise project

list_keys

List translation keys in a Lokalise project

list_languages

List languages in a Lokalise project

list_orders

List translation orders in your Lokalise account

list_projects

List all Lokalise projects

list_team_members

List all team members in your Lokalise account

list_translations

List translations for a key in a Lokalise project

update_key

Update an existing translation key

upload_file

Upload a localization file to a Lokalise project

Example Prompts for Lokalise in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Lokalise immediately.

"List all my Lokalise translation projects and show their current status."

"Create a new translation key 'checkout.success.message' in my Web App project for the web platform."

"Download all Portuguese (pt-BR) translations from my Mobile App project in JSON format."

Troubleshooting Lokalise MCP Server with LangChain

Common issues when connecting Lokalise to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Lokalise + LangChain FAQ

Common questions about integrating Lokalise MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.