OpenBullet doesn't have the option to directly connect to CaptchaAI services, But until they add it you can use CaptchaAI in solving its Captchas.
First, you need to Log in to your account on CaptchaAI to get your key
In OpenBullet Software, Choose "Captchas" Settings, Then choose "Custom 2 Captcha Server Option".
Add Your CaptchaAI API Key, Domain, Port.
If All is Done, It should work normally Just Run the software and The captcha will be solved through CaptchaAI services.