# Introduction CTRL by Sendstack helps you and your team effortlessly manage shipments across multiple partners, automate delivery assignments and track progress. All functionality are available via the CTRL dashboard or via APIs. The Sendstack API is a RESTful web service for developers and teams to programmatically interact with their delivery data, partners, delivery management, and analytics functionality. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sendstackhq.com/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.