Integrate the backend endpoint in your NextJS application
Install required dependencies
Create the message store
threadId
including messages that are not sent to the client like the tool call messages.Create the API route file
app/api/chat/route.ts
and add the necessary imports:Set up the POST handler
Initialize the OpenAI client
Handle message storage
Create streaming chat completion
Transform the response stream
Return the streaming response
Set your API key
.env.local
file: