Docs

Update Assistant

Updates an existing assistant in Vapi.

POST

Body

Arguments
stringrequired
object
object
object
string

This is the first message that the assistant will say. This can also be a URL to a containerized audio file (mp3, wav, etc.). If unspecified, assistant will wait for user to speak and use the model to respond once they speak.

boolean
string

This is the mode for the first message. Default is 'assistant-speaks-first'.

Use:

  • 'assistant-speaks-first' to have the assistant speak first.

  • 'assistant-waits-for-user' to have the assistant wait for the user to speak first.

  • 'assistant-speaks-first-with-model-generated-message' to have the assistant speak first with a message generated by the model based on the conversation state. (assistant.model.messages at call start, call.messages at squad transfer points).

@default 'assistant-speaks-first'

object
string

These are the messages that will be sent to your Client SDKs. Default is conversation-update,function-call,hang,model-output,speech-update,status-update,transfer-update,transcript,tool-calls,user-interrupted,voice-input,workflow.node.started,assistant.started. You can check the shape of the messages in ClientMessage schema.

string

These are the messages that will be sent to your Server URL. Default is conversation-update,end-of-call-report,function-call,hang,speech-update,status-update,tool-calls,transfer-destination-request,handoff-destination-request,user-interrupted,assistant.started. You can check the shape of the messages in ServerMessage schema.

number

This is the maximum number of seconds that the call will last. When the call reaches this duration, it will be ended. @default 600 (10 minutes)

string
boolean

This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech. @default false

array of object

These are the configurations to be passed to the transport providers of assistant's calls, like Twilio. You can store multiple configurations for different transport providers. For a call, only the configuration matching the call transport provider is used.

object
array of object

These are dynamic credentials that will be used for the assistant calls. By default, all the credentials are available for use in the call but you can supplement an additional credentials using this. Dynamic credentials override existing credentials.

array of object

This is a set of actions that will be performed on certain events.

string

This is the name of the assistant. This is required when you want to transfer between assistants in a call.

string

This is the message that the assistant will say if the call is forwarded to voicemail. If unspecified, it will hang up.

string

This is the message that the assistant will say if it ends the call. If unspecified, it will hang up without saying anything.

array of string

This list contains phrases that, if spoken by the assistant, will trigger the call to be hung up. Case insensitive.

object
object

This is for metadata you want to store on the assistant.

object
object
object
object
object
object
array of string

These are the credentials that will be used for the assistant calls. By default, all the credentials are available for use in the call but you can provide a subset using this.

object
object
Field selectionChoose which fields should be included in the response. Learn more
string

Comma-separated response fields to include.

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