How to Obtain DeepL API Key?

1. Introduction

This article will explain how to obtain a DeepL API key.

2. Step-by-Step Guide

2.1. Log in/Register for a DeepL account

First, click to login/register your DeepL account here.

2.2. Register and activate the DeepL API service

Click on the DeepL API > access interface above and click on activate free use immediately.

Navigate to DeepL API >Select Access Interface. Click Get Started for Free.

Select the API package service that suits you and click Sign Up for Free. You can choose any package here.

2.3. Get API key

After activating the API service, click the account in the upper right corner to enter the account settings.

Click the Account tab and scroll down to get your DeepL API key.

Frequently Asked Questions

1. Translation tool installation failed

When installing from the App Store, DeepL prompts “Translation tool installation failed. Please check on the official website whether the key is correct or if you have purchased the translation service.”

Analysis

• If you are using a free API key ending in:fx, please note that DeepL has restricted our IP address from using free keys. We recommend purchasing a paid API key to resolve this issue.
• To verify whether a free :fx key is restricted for our IP: Try testing the same key on a third-party translation platform such as Immersive Translate. If it works there but not in our system, it means our server’s IP is blocked from using that key. Unfortunately, the only solution is to switch to another translation service — there is no workaround.

If the key also fails in Immersive Translate, then the key itself has likely been restricted by DeepL. In this case, we suggest either switching to another translation service or contacting DeepL support directly.

⚠️ If you purchased your API key from a third party (e.g., Taobao), the key may be invalid or restricted. We strongly recommend obtaining your API key directly from DeepL’s official website to ensure its validity.