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.

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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

compatible-crimson

12/3/2025

DTMF Tool Response Too Late — Call Ends Prematurely

@Duckie I’m encountering an issue where the DTMF tool is successfully triggered, but the response seems to arrive too late for the IVR system to process -resulting in the call being terminated before any connection is made. - DTMF is enabled in predefined functions. - I’m using the following prompt logic: [When navigating an IVR tree]...

adverse-sapphire

12/3/2025

call start error

since yesterday i am unable to initiate any outbound call with any assistant. I am getting this: call.start.error-get-transport You can check this call id 019ae38f-47d1-7336-867d-e5fb2b1244ef...

exotic-emerald

12/3/2025

in all my agents i cant find any more the code snippet - does anyone else have this problem?

ambitious-aqua

12/3/2025

Agent does not pick up on the result supplied by tool calling?

It clearly shows that tool calling was successful and provided a result. But the AI keeps gaslighting and telling me that the results haven't come in yet. What could be causing this? Call ID: 019ae3cb-7d41-7cc2-8b84-790b029312bb...

national-gold

12/3/2025

Rime Integration with VAPI

hi, i'm trying to connect my Rime key to Vapi and it's not accepting. Does Rime integrate with VAPI?

tame-yellow

12/3/2025

How do I maintain evals for multiple projects in same dashboard?

Is there a way to setup evals for different projects that use common evals?

correct-apricot

12/3/2025

(Urgent) Question on POST /call Behavior: Concurrency Limit and Queuing

I am writing to inquire about the behavior of outbound calls using the POST /call endpoint when the concurrency limit is exceeded. Based on a recent email announcement, I had expected that Vapi would handle the queuing of calls when the concurrency limit is reached. ...

fascinating-indigo

12/3/2025

Dynamic Variables from API Request Tool Not Rendering in System Prompt After Successful Tool Call

I'm experiencing an issue with dynamic variables not being properly rendered in my system prompt after a successful apiRequest tool call. I use the dashboard. I've thoroughly debugged the issue and would appreciate your assistance. Issue Details: - I've configured an API request tool that returns data including fields like date, dayOfWeek etc. - I've mapped these responses to dynamic variables in the tool configuration in response body. See attached images. the Response Body is auto generated when I test the tool call using "Save Schema"...

extended-salmon

12/3/2025

GoHighLevelMCPCredential or its authenticationSession not found

Hello, support team. While I was integrating vapi to GHL, I faced on this error: "GoHighLevelMCPCredential or its authenticationSession not found" I set GHL api key correctly and GHL tools was connected correctly. I tried to follow your guide, but it didn't work. How can I fix this error? Why this error is occured?...

typical-coral

12/3/2025

Custom knowledge base removed from dashboard saves

I created a custom knowledge base and added it to the assistant, but now every time I do anything in the dashboard, it overrides it. Is there any way to fix this or a better solution here?

other-emerald

12/2/2025

Server side background messages

Is it possible to send a background message to update the conversation history from a server? Or is that only possible from a client?

other-emerald

12/2/2025

(Urgent) Vapi is passing Agent transcription model causing numerous spelling errors

I'm seeing user speech transcription + agent speech transcription fed to model (using open ai 5.1) as the messages context. Can we use the model's output directly instead of agent speech transcription which can have errors? For example: in this call https://dashboard.vapi.ai/calls?callId=019ae00b-36d1-7117-b9e5-1a04fbad0033 - User says "So please send the email directly to me at triston at with pace dot com" - Model outputs "I heard you say triston at with pace dot com"...

variable-lime

12/2/2025

Cannot access my assistants

When i clicked on my assistant from assistants section, it is showing Error: Something went wrong. I am attaching screenshot of the screen and console logs. @Vapi Team @Duckie

message.txt

genetic-orange

12/2/2025

Issue with Currency Verbalization – Bot Says “BRL” Instead of “Reais

I’m reaching out because I’ve been facing a persistent issue with my voice agent’s prompt, and I’ve already tried multiple adjustments without success. My agent is designed for debt collection in Brazil, so the language used is Portuguese (Brazil). Here in Brazil, the correct way to pronounce the local currency is “reais”, not “BRL”. However, despite specifying this clearly in the prompt (and even reinforcing that “BRL” should never be spoken), the bot still pronounces it as “B-R-L” frequently. This makes the audio sound unnatural and not aligned with local standards....

genetic-orange

12/2/2025

Workflow Settings Not Found

I need your help regarding the workflow configuration. I’m trying to adjust several backend settings — specifically: Call Timeout Settings Messaging Stop Speaking Plan...

absent-sapphire

12/2/2025

Test suites are failing

Multiple test suite are failing when am trying to run 7 test calls Here is the test suite id: c6015601-bf48-47e4-b416-ab266c7a015c...

jolly-crimson

12/2/2025

Unable to access my assistant

Two days with an error as per the screenshot. Sent email support yesterday. Got multiple Assistants and they seem to be ok, but this one does not work, nor can I access it Can I share the ASSistant ID here?...

robust-apricot

12/2/2025

Variable values being modified by Vapi when passing to tool calls

I noticed in the Vapi SDK, we can pass in a key called "variableValues" on the Vapi instance instantiation but the value of these keys seem to be obfuscated /modified once Vapi recieves them and tries to use that value in tool calls. This is a major bug for my use case as it allows me to differentiate among user chat histories. I noticed when I told Vapi to pass this variableValue to the tool calls as a param, it would modify slight characters in the string value. These are some failed logs I found on my server when trying to make tool calls with Vapi. As you can see, it slightly obfuscates the string. Failed requests (10:41:50 - 10:42:32): - ❌ Request 1: 2536d197-fc73-497d-8c8a-e6755bfe404 (corrupted: d199 → d197, missing b) - ❌ Request 2: 2536d199-fc73-497d-8c8a-e67555bfe404 (corrupted: bbf → 55b, 4f missing)...

quickest-silver

12/2/2025

Transfer call is not working

Hi vapi team, when using my agent everything works well until it's time to transfer the call. Agent initiates it but then the call drops...

ratty-blush

12/2/2025

Can't initiate a call from VAPI

Hello! I'm new to VAPI 1. Created account 2. Added SIP Trunk 3. Added phone number 4. Pressing "Make a call" on phone number page...

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