# Colibri Products Colibri provides a structured set of software building blocks for trustless IoT systems. At its core, the **Colibri SDK** defines the foundational primitives required for stateless verification, proof handling, and integration into constrained and heterogeneous environments. On top of this foundation, Colibri offers productized components that address recurring application needs such as payments, access control, and device updates. These components build on the SDK abstractions while remaining composable and optional. They are designed to be embedded into existing IoT architectures without introducing additional trust assumptions, centralized dependencies, or long-lived backend requirements. Together, the **Colibri SDK** and its associated products translate the architectural properties described in the previous chapters into deployable software components that can be integrated efficiently into real-world IoT systems. > [Colibri SDK](/iot-colibri-stateless/applications-and-colibri-products/colibri-products/colibri-sdk.md) > [colibri.pay](/iot-colibri-stateless/applications-and-colibri-products/colibri-products/colibri.pay.md)\ > [colibri.access](/iot-colibri-stateless/applications-and-colibri-products/colibri-products/colibri.access.md)\ > [colibri.update](/iot-colibri-stateless/applications-and-colibri-products/colibri-products/colibri.update.md) --- # 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://corpus-core.gitbook.io/iot-colibri-stateless/applications-and-colibri-products/colibri-products.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.