How to stream response from a custom backend API

[MarLapuz]

Hi everyone,

I’m currently working on a project that integrates a custom backend API with the Vercel AI SDK. I’m interested in implementing streaming responses from my backend API to enhance the user experience.

Could anyone provide guidance or examples on how to achieve this? Specifically, I would like to know:
1. The best practices for setting up streaming responses in a custom backend API.
2. How to properly configure the Vercel AI SDK to handle these streaming responses.
3. Any potential pitfalls or common issues I should be aware of when implementing this feature.

I appreciate any insights or resources you could share. Thank you in advance for your help!

[WillDaSilva]

The stream protocols they use (both the "text" and "data" variants) is well documented here: https://sdk.vercel.ai/docs/ai-sdk-ui/stream-protocol

They provide an example of using FastAPI to implement a custom backend API: https://github.com/vercel/ai/tree/main/examples/next-fastapi

[MarLapuz]

Thank you for sending the docs. I believe this is what we need to follow the stream protocol on our backend. Thanks, @WillDaSilva !