# Crystal Toolkit "Crystal Toolkit" refers to two things: * An app on the Materials Project that allows manipulation and transformation of crystal structures, both from the Materials Project database or uploaded by the user. * It refers to the [underlying Crystal Toolkit code](https://docs.crystaltoolkit.org), which was developed to write this app and which now powers the entire Materials Project website! This documentation page shows how to use the app specifically. --- # 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.materialsproject.org/apps/analysis-apps/crystal-toolkit.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.