Generating an API key
A DeepL API key authenticates every request StackOne sends to the DeepL API.
Sign in to DeepL
Sign in to your DeepL API account.

Open your account settings
In the sidebar at the bottom-right, click Account.

Open API Keys & Limits
On the Your account page, click the API Keys & Limits tab.

Create and copy a key
On the API keys subtab, click Create key, or use an existing key from the table.
- Leave the permissions unchanged so the Permissions column shows Unrestricted. A key with Custom permissions returns
403 Forbiddenfor any endpoint outside its scopes. - Click the copy icon next to the key in the API key column.
- Paste it into the API Key field in StackOne Hub.
- DeepL API Free keys end in
:fx.

Select your API plan
The API Plan field tells StackOne which DeepL host to call. Free and Pro keys work only on their own host.
- Select DeepL API Free (api-free.deepl.com) for a key that ends in
:fx. - Otherwise, select DeepL API Pro (api.deepl.com).
Linking the Account from the Hub
Navigate to the Hub
Fill out the fields
- API Key
- API Plan
Connect
- Click Connect
- If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider’s authorization flow.
- Once authorization is successful, you will see a confirmation popup
If the account linking is successful, you will see the newly linked account on your Accounts page.