> For the complete documentation index, see [llms.txt](https://support.simbase.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.simbase.com/api.md). # API Jump straight to coding: [Simbase API v2 Reference](https://developer.simbase.com) With the Simbase REST API, you can easily manage your SIM cards, including activating and deactivating them, checking their usage, and updating their plan. Our API is designed to be simple and easy to use, so you can quickly integrate it into your existing systems. Whether you are a developer looking to automate your SIM card management or a business looking to streamline your operations, our API has everything you need to get started. You will find detailed information on how to use our API, including endpoints, request and response formats, and examples of common use cases on the [Simbase Developer Portal](https://developer.simbase.com). There you can also test the API straight from your browser using one of your own API Keys, and once you feel ready for scripting you can copy and paste examples for many HTTP clients and languages. Let's get started! If you need to review the API reference for previous versions (Simbase API v1), it's still available [here](https://docs.simbase.com). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://support.simbase.com/api.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.