StockX API provides:

• Product details (title, brand, style ID, SKU)
• Product attributes (colorway, gender, release date, retail price)
• Size chart information
• Market data (ask, bid, last sale by size)
• Sales volume and counts
• Product images

GOAT/Alias API provides:

• Product search and catalog
• Pricing insights (ship to verify, consignment)
• Recent sales data
• Lowest listing prices
• Product images and details