API Access

SellerLegend's API enables developers and technical Amazon sellers to integrate their analytics data into custom applications, dashboards, and business workflows. Built on OAuth 2.0 authentication—the industry standard for secure API access—our RESTful API allows your applications to communicate directly with SellerLegend and programmatically download the data you need. Getting started is straightforward: register a client application in your SellerLegend account to receive your Client ID and Client Secret, then follow the OAuth authorization flow to obtain access tokens. Access tokens remain valid for 15 days, with refresh tokens lasting 30 days, ensuring uninterrupted data access for your integrations. The API provides endpoints for sales data, Cost of Goods (COGS), inventory levels, profit calculations, orders, and report data—everything you need to build custom analytics tools, sync with accounting software, or create specialized dashboards for your business. For PHP developers, we offer an official SDK (available via Composer) that simplifies integration with pre-built functions for common API operations. Comprehensive documentation is available through our Postman collection, which includes all available endpoints with example requests and responses. The API supports the same data granularity available in the SellerLegend interface, allowing you to build applications that match or extend the platform's capabilities. Whether you're building internal tools for your Amazon business, creating agency-wide reporting dashboards, or integrating with third-party systems like ERP or accounting software, the SellerLegend API provides the programmatic access you need.