Inbound call webhook payload for voice agent deployments

After an inbound call finishes, Sarvam sends a POST request to your webhook URL with the call result. Configure the webhook URL in the deployment’s webhook_config — see Create deployment and Update deployment.

Payload schema

Field	Type	Description
`app_id`	string (required)	ID of the agent.
`app_version`	integer (required)	Version of the agent.
`deployment_id`	string (required)	Deployment this call belongs to.
`interaction_id`	string (required)	Unique identifier for this call interaction. Also used as the `attempt_id` in delivery records and retry requests.
`user_phone_number`	string (required)	Phone number of the caller in E.164 format.
`agent_phone_number`	string (required)	Inbound number the user dialed, in E.164 format.
`duration`	number	Call duration in seconds. Defaults to `0.0`.
`final_agent_variables`	object \| null	Agent variables at the end of the conversation.
`output_agent_variables`	object \| null	Variables collected by the agent during the call.
`start_datetime`	string \| null	Timestamp when the call started (ISO 8601 UTC, e.g. `2026-09-01T18:44:15Z`).
`end_datetime`	string \| null	Timestamp when the call ended (ISO 8601 UTC, e.g. `2026-09-01T18:44:31Z`).
`interaction_transcript`	array \| null	Transcript of the conversation as a list of turns. Each turn has `role` (`"agent"` or `"user"`), `en_text`, and optional `indic_text`.
`metadata`	object \| null	Custom metadata from the webhook configuration.

Example

{
  "app_id": "Conversatio-4889d972-cc49",
  "app_version": 3,
  "deployment_id": "pruthviraj--8430b3a7-dfc1",
  "interaction_id": "20260828/8448d531-12:47:17-0f1a2cb7",
  "user_phone_number": "+917948229484",
  "agent_phone_number": "+918044620704",
  "duration": 51.58,
  "final_agent_variables": {
    "customer_name": "Akul",
    "call_disposition": "BUSY_CALL_BACK",
    "call_outcome": "busy_callback",
    "follow_up_required": true
  },
  "output_agent_variables": {
    "call_outcome": "busy_callback",
    "follow_up_required": true
  },
  "start_datetime": "2026-08-28T07:16:25Z",
  "end_datetime": "2026-08-28T07:17:17Z",
  "interaction_transcript": [
    { "role": "agent", "en_text": "Hello, am I speaking with Akul?", "indic_text": null },
    { "role": "user", "en_text": "Yes, speaking.", "indic_text": null },
    { "role": "agent", "en_text": "I am calling regarding your loan application.", "indic_text": null }
  ],
  "metadata": { "ref": "crm-lead-42" }
}