Bol.com

Bol.com's API is well-designed for e-commerce integration, offering both Retailer and Marketing APIs. It supports OAuth2 and API key authentication with comprehensive OpenAPI specifications. The API covers product catalogs, order management, inventory, and affiliate marketing extensively.

Rate limiting is reasonable at 1200 requests per hour, with good error handling. However, it requires either a retailer account or affiliate approval, and documentation is sometimes Netherlands-focused. It's ideal for Dutch e-commerce businesses, but international developers may find limited applicability outside the Benelux market.