API Integration for Inventory Management

I need to connect Squareup and Collectr.app APIs into a spreadsheet. This spreadsheet should update with inventory and market price in a CSV-friendly format for Squareup.

Requirements:
- Track product quantity, product price, and sales data
- Pull data from both Squareup and Collectr.app equally
- Output format should match two provided example files

Ideal Skills & Experience:
- Experience with API integration
- Proficient in handling CSV files and spreadsheet automation
- Familiarity with Squareup and Collectr.app

Provide a clean, automated solution for real-time updates.