VAPI

Vapi helps developers build, test, and deploy voice agents at scale. We enable everything in between the raw models and production, including telephony, test suites, and real-time analytics.

Join

VAPI

Vapi helps developers build, test, and deploy voice agents at scale. We enable everything in between the raw models and production, including telephony, test suites, and real-time analytics.

Join

support

faq

like-gold

11/9/2025

Custom function Doesn't return response n8n + Vapi

Hello I am trying to make a custom Function and return availability to VAPI but I keep getting this error: I also included my respond webhook as well. any ideas ?...

eastern-cyan

11/9/2025

2.5 million calls a week, wanting to use VAPI, please DM me.

I am doing 2.5 million calls a week and want to use vapi today, please DM me.

quickest-silver

11/9/2025

Twilio voice quality issues

We are experiencing issues with the Twilio vocie quality. We are currently using a setup, where we accept the twilio call using a webhook on our backend, then create a call in vapi using the phoneCallProviderBypassEnabled flag and returning the twiml generated by vapi back to twilio (https://docs.vapi.ai/calls/call-handling-with-vapi-and-twilio#solution). Any help would be really appreciated ❤️ Call-ID: 019a68bf-86f0-7220-9074-d1d63554510d...

test_call_customer_o...

conscious-sapphire

11/9/2025

Invoke Tool at call start

Hi we need to call a tool to fetch a bearer token to pass the token to subsequent API calls. Currently, not matter what we try, the bearer token API gets called at the same time as the 2nd API, and so we don't get the token in time and the 2nd API fails. The {{token}} is a required variable in the 2nd API call but VAPI just sends a blank. Is it possible to force VAPI to get the bearer token as soon as the call starts?

vicious-gold

11/9/2025

Date formatting issue

Today is the 9th of november, and I am telling the AI agent that I would like to book for tomorrow at 10am and it is returning this ISO format to my make.com where the month is going up by one like "2025-09-12T10:00:00". It is creating trouble in my appointment booking and checking on google calendar.

vicious-gold

11/9/2025

Tool call problem

My tool call (custom getAvailability and setMeeting) which gets sent to my server URL is coming back a success to the agent without finishing the workflow and the agent is giving back a success before Make.com even follows its workflow, can I get some help? This didn't happen before and also when I use the pre-built in tools the agent actually checks the schedule, but not with my custom tool.

absent-sapphire

11/8/2025

I need to upgrade to Enterprise. Please ask someone to contact me. ch@bizbeeusa.com or here.

wise-white

11/8/2025

"pipeline-error-google-llm-failed" Error

Getting this error when testing on the Vapi platform when trying to test my assistant Im using Gemini Live model In Hebrew...

national-gold

11/8/2025

Phone transfers/SIP Trunking

Hey everyone! We’re setting up an extensive list of phone transfer destinations with extensions. Doing this in the Tools section in VAPI has caused us problems, and it’s refusing to transfer to the extensions we add - instead it sends the caller to the main number. Do we:...

inland-turquoise

11/8/2025

Error: Key does not allow origin https://dashboard.vapi.ai

Hey everyone. I use my agent from the dashboard. Recently I kept having this issue. What I changed recently : Connected my Azure account. But even if I go back to the original settings, it still does it ...

vicious-gold

11/8/2025

Assistant hooks with prompt action type not working

I am setting the below hook but it does nothing. If I switch to "exact" it works fine. "hooks": [ {...

other-emerald

11/8/2025

I keep getting robot calls to my vapi and wasting my credits! Help

Help me please, is wasting my credits that i paid for

vicious-gold

11/7/2025

URGENT: Cannot create BYO phone numbers

For the last few hours all requests to https://api.vapi.ai/phone-number are returning 400 Example: ...

correct-apricot

11/7/2025

Why isn’t the PCAP file showing up in the call details?

I'm trying to make calls and figure out what the problem is with the transfer because it's not working. However, the PCAP file doesn’t appear, so I can’t see the call trace.

jolly-crimson

11/7/2025

Block spam numbers

How can I block unwanted callers in vapi?

adverse-sapphire

11/7/2025

Getting Assistant to Speak a Message Before Triggering a Tool

We require assistants to speak a custom message before triggering a tool. Since we want a variety messages spoken under different cases for our transfer/end call tools, we require the message to be spoken before triggering the tool. I can get the behavior to work as intended in all cases expect for when a customer asked not to be called. Example where model behaves as intended: - When asked to speak to a real person: First, say "Let me get one of our expects on the line.". After, use transfer_call_testing tool ...

correct-apricot

11/7/2025

Cant get assistant to send transcript and data collection to custom webhook

I have created a basic ai assistant to capture data from missed calls for my business. I do not see any transcript of the call after talking to AI. Webhook is successful but i cant see a transcript.

like-gold

11/7/2025

None of my VAPI numbers are working

I have a few clients and none of the numbers are working NOR can I create a new number. This is a MAJOR ISSUE

constant-blue

11/7/2025

VAPI numbers no longer working

Phone numbers just stopped working. Here is a call id: 019a5f9d-0de5-7770-be73-354961c99363...

fair-rose

11/7/2025

Vapi Keeps Booking Appointments for 2023!

I just hooked up my Google Calendar with Vapi, but when the assistant is calling the tools it keeps checking availability in October 2023. How do I properly configure the tool/calendar to make sure the assistant is up to date, and check real-time availability rather than past availability?