Having the ESV API key enables you to access the ESV text from any programmable device or app.
Here is a step by step guide on generating the key.
Log in to ESV.org or create an account
If you don’t have an account with ESV.org you’ll need to create one.
Generate the API Key
Once you are logged in, click on Create an API Application (https://api.esv.org/account/create-application/)
Fill out the form with appropriate details and click on Create Application.
This will generate a token key as shown below.
You can then use this key in any application that makes API calls to esv.org.