API Integration and Payment Setup

I need someone to complete the integration of several APIs and payment gateways on a Codecanyon script I have set up.

Tasks include:
- Facebook Developer integration
- Instagram API integration
- LinkedIn API integration
- YouTube API integration
- OpenAI API integration (including OpenAI 4)
- Kling Video AI integration
- Change Stripe payment gateway

And testing connecting social media account scheduling post it goes account connected checking payment etc etc

Ideal Skills and Experience:
- Experience with Codecanyon scripts
- Strong background in API integration
- Familiarity with Facebook, Instagram, LinkedIn, YouTube, OpenAI, and Kling APIs
- Experience with Stripe payment gateway

Please provide examples of similar work done.