Option A) Build a custom tool in vapi. Set the server address to n8n Webhook (to recieve data). connect an ai agent in n8n that gets your query from Vapi and searches through the KB to find the answer ( a google sheet tool).
// This works but its slower....3-5 sec time to responds
Option B) Use the example to implement the method to retrieve info
https://docs.vapi.ai/assistants/examples/docs-agent
This is fast.
Both methods are tested and work perfectly...