# Three Sigma API ## Docs - [👋 Introduction](https://docs.threesigma.ai/api-reference/introduction.md): Understand general concepts, response codes, and authentication methods. - [Chat Simple](https://docs.threesigma.ai/chat/chat-simple.md) - [Add To Collection](https://docs.threesigma.ai/collections/add-to-collection.md) - [Create Collection](https://docs.threesigma.ai/collections/create-collection.md) - [Delete Collection](https://docs.threesigma.ai/collections/delete-collection.md) - [Edit Collection](https://docs.threesigma.ai/collections/edit-collection.md) - [Get Collection](https://docs.threesigma.ai/collections/get-collection.md) - [Get Collections](https://docs.threesigma.ai/collections/get-collections.md) - [Remove From Collection](https://docs.threesigma.ai/collections/remove-from-collection.md) - [Delete](https://docs.threesigma.ai/documents/delete.md) - [Item Progress](https://docs.threesigma.ai/documents/item-progress.md) - [Modify](https://docs.threesigma.ai/documents/modify.md) - [Progress](https://docs.threesigma.ai/documents/progress.md) - [Retrieve](https://docs.threesigma.ai/documents/retrieve.md) - [Upload](https://docs.threesigma.ai/documents/upload.md) - [Upload Url](https://docs.threesigma.ai/documents/upload-url.md) - [Query Simple](https://docs.threesigma.ai/query/query-simple.md) - [Create Thread](https://docs.threesigma.ai/threads/create-thread.md) - [Delete Thread](https://docs.threesigma.ai/threads/delete-thread.md) - [Get Messages](https://docs.threesigma.ai/threads/get-messages.md) - [Get Threads](https://docs.threesigma.ai/threads/get-threads.md) ## OpenAPI Specs - [openapi](https://docs.threesigma.ai/openapi.json)