Personal experiment

Voice knowledge assistant

Exploring a voice interface connected to a retrieval-backed knowledge workflow.

StatusPersonal prototype · Learning project

ContributionPersonal integration and learning

Tools & technologiesVapi · n8n · Supabase vectors · OpenRouter · Gemini embeddings · Google Drive API · Webhooks

The problem

Explore how a voice interface can use retrieved knowledge rather than relying only on a model’s general response.

My contribution

Connected Vapi’s voice interface to an n8n retrieval workflow using Supabase vector storage, embeddings and a language-model response stage. Explored retrieving contextual knowledge for spoken questions rather than relying only on static answers.

How it works

Voice request
Workflow
Knowledge retrieval
Response

Explanatory workflow illustration · not a product screenshot.

Engineering decisions

Distinguish retrieval and orchestration from the speech services provided by Vapi.

Outcome & current status

A learning prototype that developed integration understanding.

Scope & limitations

Not a production support system. No call-volume, reliability or business-impact claims.