# Educational Use and Research Some of our APIs require a paid subscription for access. Requests made using an API key created under a Free plan will be rejected in these cases. Premium endpoints include: * Az Alt Search * Geodesic * Elevation * Solar Eclipse Paths and Local Circumstances * Lunar Limb Profiles * Estimated Daily and Monthly Insolation If you are working in an educational capacity or as an academic researcher, we will be happy to provide access at no charge to these APIs upon request. Please write to with details of your request. Usage will still be subject to normal Free plan limits by default, but please let us know if you would like to discuss a higher limit. If your research project is in the process of commercialization, we ask that you purchase a paid plan. We're happy to discuss extended trials, depending on your circumstances. --- # 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.radiantdrift.com/radiant-drift-api/educational-use-and-research.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.