on_call_end

About This Event

The on_call_end webhook is triggered at the conclusion of a call in the Altur platform. This webhook provides detailed information about the call, the agent involved, and the campaign user. Use this webhook to keep your backend or CRM updated with the latest call data.

Event Details

Trigger: Automatically triggered at the end of a call.
Purpose: To update your backend or CRM with call status, transcript, recording URL, and user information.

Request Details

HTTP Method: POST
Content Type: application/json
Endpoint: The URL you configure in your webhook integration settings.
Authentication: Includes the X-Altur-Signature header for HMAC verification.

Payload Example

Here’s an example of the payload sent with the on_call_end event:

{
  "event_type": "on_call_end",
  "id": "cll_gBoLtd02pUI50QwXkFjB",
  "thread_id": "thr_Kp7mQz3XvNb8LcRt2sYw",
  "type": "outbound",
  "status": "ended",
  "phone_number_from": "+000000000000",
  "phone_number_to": "+000000000000",
  "answered_by": "human",
  "created_at": "2026-09-30T21:07:09.184530+00:00",
  "started_at": "2026-09-30T21:07:12+00:00",
  "ended_at": "2026-09-30T21:07:57.903114+00:00",
  "ended_by": "user",
  "ended_reason": "user_hangup",
  "transfer_initiated_at": null,
  "transfer_completed_at": null,
  "duration": 45,
  "billed_duration": 45,
  "recording_url": "https://api.altur.io/api/v1.0/call/cll_gBoLtd02pUI50QwXkFjB/recording",
  "transcript": [
    {
      "sequence": 0,
      "sent_by": "assistant",
      "sent_at": "2026-09-30T21:07:13.402156+00:00",
      "content": "Hello am I speaking with Sofía?"
    },
    {
      "sequence": 1,
      "sent_by": "user",
      "sent_at": "2026-09-30T21:07:25.522862+00:00",
      "content": "Yes, who is this?"
    }
  ],
  "assistant": {
    "id": "6cy951e6-9877-4d7c-88d7-56b4948d3cce",
    "nickname": "DebtCollectorBot",
    "name": "Diana Arroyo"
  },
  "end_user": {
    "id": "2be951e6-7798-47cd-878d-49b2918a3bba",
    "status": "converted",
    "display_name": "John Doe",
    "phone_number": "+521234567890",
    "context": "Customer data...",
    "extracted_data": {
      "Payment Amount": "1200",
      "Payment Date": "2024-12-26",
      "Payment Medium": "app"
    },
    "tags": ["payment_promise", "call_later"]
  },
  "campaign_user": {
    "f_id": "user_12345",
    "name": "John Doe",
    "contact": "+521234567890",
    "context": "Customer data for campaign...",
    "status": "converted",
    "failed_retries": 0,
    "voicemail_retries": 1,
    "extracted_data": {
      "Payment Amount": "1200",
      "Payment Date": "2024-12-26",
      "Payment Medium": "app"
    },
    "tags": ["payment_promise", "call_later"]
  }
}

Timestamps are ISO 8601 in UTC with a +00:00 offset, e.g. 2026-09-30T21:07:25.522862+00:00. The fractional seconds are optional and are sometimes omitted (e.g. 2026-09-30T21:07:12+00:00), so parse them with an ISO 8601 parser rather than a fixed format string. This applies to every timestamp in the payload, including transcript[].sent_at.

Root Fields

Field	Type	Description
`event_type`	`string`	Event type (`on_call_end`).
`id`	`string`	Unique identifier for the call.
`thread_id`	`string`	Unique identifier of the Thread the call belongs to.
`type`	`string`	Call type (`outbound`or `inbound`).
`status`	`string`	Status of the call enum value (e.g., `ended`).
`phone_number_from`	`string`	E.164 formatted number.
`phone_number_to`	`string`	E.164 formatted number.
`answered_by`	`string`	Indicates who answered the call (`human`, `machine` or `unknown`).
`created_at`	`datetime`	ISO formatted date time of when the call was created.
`started_at`	`datetime`	ISO formatted date time of when the call started.
`ended_at`	`datetime`	ISO formatted date time of when the call ended.
`ended_by`	`string`	Indicates who ended the call (`agent`, `user` or `system`). Empty if the call never connected.
`ended_reason`	`string`	Brief reason why the call ended. Empty if not available.
`transfer_initiated_at`	`datetime`	ISO timestamp when Altur recorded transfer handoff starting. Empty when not transferred.
`transfer_completed_at`	`datetime`	ISO timestamp when Altur recorded the transfer leg connecting. Empty when not transferred.
`duration`	`int`	Call duration in seconds.
`billed_duration`	`int`	Billed call duration in seconds.
`recording_url`	`string`	URL to download the call recording.
`transcript`	`array`	List of transcript messages, in order.

Transcript Item

Field	Type	Description
`sequence`	`int`	Position of the message in the transcript, starting at `0`. Use it to order messages instead of sorting by `sent_at`.
`sent_by`	`string`	Who sent the message (`assistant`, `user` or `system`).
`sent_at`	`datetime`	ISO formatted date time of when the message was sent.
`content`	`string`	Message text.

Assistant Object

Field	Type	Description
`id`	`uuid`	Unique identifier for the assistant.
`nickname`	`string`	Assistant’s nickname.
`name`	`string`	Assistant’s name.

End User Object

Deprecated: The end_user object is deprecated and will be removed in a future version. Please use the campaign_user object instead for campaign-related calls.

Field	Type	Description
`id`	`uuid`	Unique identifier for the end user.
`status`	`string`	Current status of the user enum value (e.g., `converted`).
`display_name`	`string`	Display name of the user.
`phone_number`	`string`	User’s phone number (E.164 format).
`context`	`string`	Additional user-specific information.
`extracted_data`	`object`	Key-value pairs of extracted data.
`tags`	`array`	Array of tag names corresponding to tags assigned to the last campaign user or current thread.

Campaign User Object

Field	Type	Description
`f_id`	`string`	Foreign identifier for the campaign user from your system.
`name`	`string`	Name of the campaign user.
`contact`	`string`	Contact phone number (E.164 format).
`context`	`string`	Additional campaign user-specific information.
`status`	`string`	Current status of the campaign user (e.g., `converted`).
`failed_retries`	`int`	Number of failed retry attempts.
`voicemail_retries`	`int`	Number of voicemail retry attempts.
`extracted_data`	`object`	Key-value pairs of data extracted during the call.
`tags`	`array`	Array of tag names assigned to the campaign user.

Response Expectations

Your endpoint should return a 200 OK status code to confirm receipt of the webhook. For information on retry behavior in case of failures, see the Retry Policy section in the Webhook Overview.

Security

Each request includes an HMAC signature in the X-Altur-Signature header. Refer to the Securing Your Webhooks section for instructions on validating webhook requests.

Example Use Cases

CRM Integration Use the on_call_end webhook to update call logs and user interaction data in your CRM system.
Analytics Process transcripts and user status to generate insights or trigger follow-up actions.
Data Enrichment Automatically store extracted data, like account numbers or due dates, in your system for further use.

Introducción

Endpoints de API

Webhooks

About This Event

Event Details

Request Details

Payload Example

Root Fields

Transcript Item

Assistant Object

End User Object

Campaign User Object

Response Expectations

Security

Example Use Cases

​About This Event

​Event Details

​Request Details

​Payload Example

​Root Fields

​Transcript Item

​Assistant Object

​End User Object

​Campaign User Object

​Response Expectations

​Security

​Example Use Cases

About This Event

Event Details

Request Details

Payload Example

Root Fields

Transcript Item

Assistant Object

End User Object

Campaign User Object

Response Expectations

Security

Example Use Cases