Need Help Connecting Pinecone to Voiceflow – Input Works, Output Doesn’t Return

Hi everyone, I’m trying to integrate Pinecone with Voiceflow and running into a snag. I’ve attempted two approaches:

Using the Function Block in Voiceflow

I created a custom function to send user input and conversation history to Pinecone.

The input reaches Pinecone successfully, but the output doesn’t return to Voiceflow.

I’ve double-checked the input/output variable mappings and API key setup, but still no luck.

Middleware API Setup

I built a REST API to act as a bridge between Voiceflow and Pinecone.

Voiceflow sends the request to my endpoint, which forwards it to Pinecone and is supposed to return the assistant’s reply.

However, I’m struggling with the correct configuration to ensure the response flows back into Voiceflow properly.

Has anyone successfully set this up? I’d really appreciate:

Working examples

Tips on configuring the API response for Voiceflow

Any common pitfalls I might be missing

Thanks in advance for any guidance!

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