> For the complete documentation index, see [llms.txt](https://developer.kizen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.kizen.com/docs/developers.md). # Developers - [Environments](https://developer.kizen.com/docs/developers/environments.md): Understand Kizen API environments, including GO and FMO production instances, API base URLs, environment-specific authentication, and common environment mismatch errors. - [Authentication](https://developer.kizen.com/docs/developers/authentication.md): Learn Kizen API authentication. Compare token-based and OAuth2 methods, configure required headers, and set up secure access for your enterprise integration. - [Build with APIs](https://developer.kizen.com/docs/developers/building-with-apis.md): Explore the Kizen API — learn how it works, key concepts like Objects, Records, and Permissions, and the authentication methods needed to start building integrations. - [Generate API Credentials](https://developer.kizen.com/docs/developers/building-with-apis/generating-api-credentials.md): Learn how to generate your Kizen API Key, User ID, and Business ID to authenticate API requests and connect external systems to your Kizen business account. - [Create Your First API Call](https://developer.kizen.com/docs/developers/building-with-apis/creating-your-first-api-call.md): Learn how to make your first authenticated Kizen API call. This step-by-step guide walks developers through assembling credentials and calling the Kizen REST API. --- # 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://developer.kizen.com/docs/developers.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.