Update assistant

curl --request PUT \
  --url https://app.voiz.mx/api/user/assistant/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "voice_id": 123,
  "language_id": 123,
  "type": "<string>",
  "mode": "<string>",
  "timezone": "<string>",
  "initial_message": "<string>",
  "system_prompt": "<string>",
  "llm_model_id": 123,
  "multimodal_model_id": 123,
  "chat_llm_fallback_id": 123,
  "turn_detection_threshold": 123,
  "secondary_language_ids": [
    123
  ],
  "knowledgebase_id": 123,
  "knowledgebase_mode": "<string>",
  "phone_number_id": 123,
  "tool_ids": [
    123
  ],
  "tools": [
    {}
  ],
  "tts_emotion_enabled": true,
  "voice_stability": 123,
  "voice_similarity": 123,
  "speech_speed": 123,
  "llm_temperature": 123,
  "synthesizer_provider_id": 123,
  "transcriber_provider_id": 123,
  "allow_interruptions": true,
  "fillers": true,
  "record": true,
  "enable_noise_cancellation": true,
  "wait_for_customer": true,
  "max_duration": 123,
  "max_silence_duration": 123,
  "max_initial_silence_duration": 123,
  "ringing_time": 123,
  "reengagement_interval": 123,
  "reengagement_prompt": "<string>",
  "end_call_on_voicemail": true,
  "voice_mail_message": "<string>",
  "endpoint_type": "<string>",
  "endpoint_sensitivity": 123,
  "interrupt_sensitivity": 123,
  "min_interrupt_words": 123,
  "ambient_sound": "<string>",
  "ambient_sound_volume": 123,
  "is_webhook_active": true,
  "webhook_url": "<string>",
  "send_webhook_only_on_completed": true,
  "include_recording_in_webhook": true,
  "post_call_evaluation": true,
  "post_call_schema": [
    {
      "name": "<string>",
      "type": "<string>",
      "description": "<string>"
    }
  ],
  "variables": {}
}
'

{
  "message": "Assistant updated successfully",
  "data": {
    "id": 789,
    "name": "Updated Sales Assistant",
    "status": "active",
    "type": "outbound",
    "mode": "pipeline"
  }
}

PUT

https://app.voiz.mx/api/

user

assistant

{id}

Update assistant

curl --request PUT \
  --url https://app.voiz.mx/api/user/assistant/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "voice_id": 123,
  "language_id": 123,
  "type": "<string>",
  "mode": "<string>",
  "timezone": "<string>",
  "initial_message": "<string>",
  "system_prompt": "<string>",
  "llm_model_id": 123,
  "multimodal_model_id": 123,
  "chat_llm_fallback_id": 123,
  "turn_detection_threshold": 123,
  "secondary_language_ids": [
    123
  ],
  "knowledgebase_id": 123,
  "knowledgebase_mode": "<string>",
  "phone_number_id": 123,
  "tool_ids": [
    123
  ],
  "tools": [
    {}
  ],
  "tts_emotion_enabled": true,
  "voice_stability": 123,
  "voice_similarity": 123,
  "speech_speed": 123,
  "llm_temperature": 123,
  "synthesizer_provider_id": 123,
  "transcriber_provider_id": 123,
  "allow_interruptions": true,
  "fillers": true,
  "record": true,
  "enable_noise_cancellation": true,
  "wait_for_customer": true,
  "max_duration": 123,
  "max_silence_duration": 123,
  "max_initial_silence_duration": 123,
  "ringing_time": 123,
  "reengagement_interval": 123,
  "reengagement_prompt": "<string>",
  "end_call_on_voicemail": true,
  "voice_mail_message": "<string>",
  "endpoint_type": "<string>",
  "endpoint_sensitivity": 123,
  "interrupt_sensitivity": 123,
  "min_interrupt_words": 123,
  "ambient_sound": "<string>",
  "ambient_sound_volume": 123,
  "is_webhook_active": true,
  "webhook_url": "<string>",
  "send_webhook_only_on_completed": true,
  "include_recording_in_webhook": true,
  "post_call_evaluation": true,
  "post_call_schema": [
    {
      "name": "<string>",
      "type": "<string>",
      "description": "<string>"
    }
  ],
  "variables": {}
}
'

{
  "message": "Assistant updated successfully",
  "data": {
    "id": 789,
    "name": "Updated Sales Assistant",
    "status": "active",
    "type": "outbound",
    "mode": "pipeline"
  }
}

This endpoint allows you to update an existing AI assistant’s configuration. All fields are optional - only provide the fields you want to update.

Path Parameters

integer

required

The unique identifier of the assistant to update

Request Body

Core Fields

name

string

The name of the assistant (max 255 characters)

voice_id

integer

The voice ID to use for the assistant. Use the Get Voices endpoint with the mode parameter to get compatible voices for your engine mode.

language_id

integer

The language ID for the assistant. Use the Get Languages endpoint to get available languages.

type

string

The assistant type. Options: inbound, outbound

mode

string

The engine mode. Options: pipeline, multimodal, dualplex

Changing the mode will reset mode-specific settings to defaults for the new mode.

timezone

string

The timezone for the assistant (e.g., “Europe/Bucharest”, “America/New_York”)

initial_message

string

The initial message the assistant will speak when the call starts (max 200 characters)

system_prompt

string

The system prompt that defines the assistant’s behavior and personality

Mode-Specific Fields

llm_model_id

integer

The LLM model ID to use. Only applies to pipeline mode.Use the Get Models endpoint to get available models.

multimodal_model_id

integer

The multimodal model ID. Only applies to multimodal and dualplex modes.Use the Get Models endpoint to get available multimodal models.

chat_llm_fallback_id

integer

Fallback LLM model ID for tool calls in multimodal/dualplex modes. Set to null to remove.

turn_detection_threshold

number

Turn detection sensitivity for multimodal/dualplex modes (0-1). Set to null for auto.

Secondary Languages

secondary_language_ids

integer[]

Array of additional language IDs the assistant can speak. Replaces existing secondary languages. Pass an empty array [] to remove all secondary languages.

"secondary_language_ids": [2, 3, 4]

Knowledgebase Settings

knowledgebase_id

integer

The knowledgebase ID to attach. Set to null to remove knowledgebase.

knowledgebase_mode

string

How to use the knowledgebase. Options:

function_call - AI calls a function to search (required for multimodal/dualplex)
prompt - Knowledge is injected into prompt (pipeline only)

Phone Number

phone_number_id

integer

The ID of a phone number to assign. Set to null to unassign. Must belong to your account.

For inbound assistants, the phone number cannot be a Caller ID type and cannot be already assigned to another inbound assistant.

Custom Mid-Call Tools

tool_ids

integer[]

Array of custom mid-call tool IDs to sync. Replaces all existing tool assignments. Pass an empty array [] to remove all tools. Each tool must belong to your account.

"tool_ids": [1, 5, 12]

Built-in Tools

tools

array

Array of built-in tools. Replaces all existing built-in tools. Pass an empty array [] to remove all tools.

Show Tool types

call_transfer - Transfer the call to another phone number

phone_number (required): Phone number to transfer to
description: When to transfer the call
custom: If true, AI can determine transfer number dynamically
timezone: Timezone for transfer availability

end_call - End the call programmatically

description: When the AI should end the call

dtmf_input - Send DTMF tones (keypad input)

description: When to use DTMF input (for IVR navigation)

calendar_integration - Schedule appointments via Cal.com

calcom_api_key (required): Your Cal.com API key
calcom_event_slug (required): The event type slug

"tools": [
  {"type": "dtmf_input", "description": "Navigate IVR when needed"},
  {"type": "end_call", "description": "End call when done"}
]

Voice and TTS Settings

tts_emotion_enabled

boolean

Whether to enable emotional text-to-speech synthesis

voice_stability

number

Voice stability setting (0-1). Higher = more consistent voice

voice_similarity

number

Voice similarity setting (0-1). Higher = closer to original voice

speech_speed

number

Speech speed multiplier (0.7-1.2)

llm_temperature

number

LLM temperature setting (0-1). Lower = more deterministic

synthesizer_provider_id

integer

Custom TTS provider ID. Set to null to use language default.

transcriber_provider_id

integer

Custom STT provider ID. Pipeline mode only. Set to null to use language default.

Call Behavior Settings

allow_interruptions

boolean

Whether to allow caller interruptions.

Cannot be disabled for multimodal and dualplex modes.

fillers

boolean

Whether to use filler audio during processing.

Only available for pipeline mode.

record

boolean

Whether to record the call

enable_noise_cancellation

boolean

Whether to enable noise cancellation

wait_for_customer

boolean

If true, the assistant waits for the customer to speak first

Timing Settings

max_duration

integer

Maximum call duration in seconds (20-1200)

max_silence_duration

integer

Maximum silence duration before re-engagement in seconds (1-360)

max_initial_silence_duration

integer

Maximum silence at call start before ending (1-120 seconds). Set to null to disable.

ringing_time

integer

Maximum ringing time before giving up (1-60 seconds)

Re-engagement Settings

reengagement_interval

integer

Re-engagement interval in seconds (7-600)

reengagement_prompt

string

Custom prompt for re-engagement messages (max 1000 characters). Set to null to use default.

Voicemail Settings

end_call_on_voicemail

boolean

Whether to end call when voicemail is detected

voice_mail_message

string

Message to leave on voicemail before hanging up (max 1000 characters). Set to null to disable.

Endpoint Detection

endpoint_type

string

Voice activity detection type. Options: vad, ai

endpoint_sensitivity

number

Endpoint sensitivity level (0-5)

interrupt_sensitivity

number

Interrupt sensitivity level (0-5)

min_interrupt_words

integer

Minimum words before interruption is allowed (0-10). Set to null to disable.

Ambient Sound

ambient_sound

string

Background ambient sound. Options: off, office, city, forest, crowded_room, cafe, nature

ambient_sound_volume

number

Ambient sound volume level (0-1)

Webhook Configuration

is_webhook_active

boolean

Whether webhook notifications are enabled

webhook_url

string

The webhook URL for post-call notifications. Set to null to remove.

send_webhook_only_on_completed

boolean

Whether to send webhooks only on completed calls (not failed/no-answer)

include_recording_in_webhook

boolean

Whether to include recording URL in webhook payload

Post-Call Evaluation

post_call_evaluation

boolean

Whether to enable AI post-call evaluation

post_call_schema

array

Schema definition for post-call data extraction. Replaces existing schema.

Show post_call_schema properties

name

string

required

Field name (3-16 chars, lowercase, alphanumeric and underscores only)

type

string

required

Data type. Options: string, number, bool

description

string

required

Description of what this field represents (3-255 characters)

Variables

variables

object

Key-value pairs of custom variables. Replaces all existing variables.

"variables": {
  "company_name": "Acme Corp",
  "product": "Premium Widget"
}

Example Requests

Update Basic Settings

{
  "name": "Updated Assistant Name",
  "initial_message": "Hello! How may I assist you?",
  "max_duration": 900
}

Switch to Multimodal Mode

{
  "mode": "multimodal",
  "voice_id": 41,
  "multimodal_model_id": 1,
  "chat_llm_fallback_id": 2,
  "knowledgebase_mode": "function_call"
}

Update Tools and Knowledgebase

{
  "tool_ids": [1, 5, 12],
  "knowledgebase_id": 3,
  "knowledgebase_mode": "prompt"
}

Update Re-engagement and Voicemail

{
  "reengagement_interval": 15,
  "reengagement_prompt": "Are you still there? I'm here to help.",
  "end_call_on_voicemail": true,
  "voice_mail_message": "Hello, please call us back at your convenience."
}

Remove Optional Settings

{
  "phone_number_id": null,
  "webhook_url": null,
  "tool_ids": [],
  "secondary_language_ids": []
}

Response

message

string

Success message confirming assistant update

data

object

Show properties

integer

The unique identifier of the updated assistant

name

string

The name of the assistant

status

string

The current status of the assistant

type

string

The type (inbound or outbound)

mode

string

The engine mode (pipeline, multimodal, or dualplex)

{
  "message": "Assistant updated successfully",
  "data": {
    "id": 789,
    "name": "Updated Sales Assistant",
    "status": "active",
    "type": "outbound",
    "mode": "pipeline"
  }
}

Notes

Only the fields you provide in the request body will be updated
To remove optional fields, explicitly set them to null
To clear arrays (tools, secondary languages), pass an empty array []
The assistant must belong to the authenticated user
Use the Get Voices endpoint with mode parameter to get compatible voices
For multimodal/dualplex modes, knowledgebase_mode must be function_call
For multimodal/dualplex modes, allow_interruptions cannot be disabled
Changing the mode resets mode-specific settings (LLM model, multimodal model, providers)

Create assistant Delete assistant

⌘I

API Reference

Assistants

Calls

Conversations

AI

Mid Call Tools

Leads

Campaigns

Phone Numbers

Knowledgebases

SMS

Webhooks

API Keys

​Path Parameters

​Request Body

​Core Fields

​Mode-Specific Fields

​Secondary Languages

​Knowledgebase Settings

​Phone Number

​Custom Mid-Call Tools

​Built-in Tools

​Voice and TTS Settings

​Call Behavior Settings

​Timing Settings

​Re-engagement Settings

​Voicemail Settings

​Endpoint Detection

​Ambient Sound

​Webhook Configuration

​Post-Call Evaluation

​Variables

​Example Requests

​Update Basic Settings

​Switch to Multimodal Mode

​Update Tools and Knowledgebase

​Update Re-engagement and Voicemail

​Remove Optional Settings

​Response

​Notes

Path Parameters

Request Body

Core Fields

Mode-Specific Fields

Secondary Languages

Knowledgebase Settings

Phone Number

Custom Mid-Call Tools

Built-in Tools

Voice and TTS Settings

Call Behavior Settings

Timing Settings

Re-engagement Settings

Voicemail Settings

Endpoint Detection

Ambient Sound

Webhook Configuration

Post-Call Evaluation

Variables

Example Requests

Update Basic Settings

Switch to Multimodal Mode

Update Tools and Knowledgebase

Update Re-engagement and Voicemail

Remove Optional Settings

Response

Notes