Login https://www.google.com/recaptcha/intro/v3.html

 

Go to my recaptcha or make a new account

 

Type label your domain name example. com without www

 

Use recaptch V2

Validate check the box I am not a robot

 

Tyoe domain one per line

 

Accept recaptcha terms and conditions.

 

Navinage contact form 7 integration page

Click configure recaptcha

Add site key and secret key which was created earlier