End of Call Report

Called after the call ends with a summary and optional structured analysis. This is the most commonly used webhook for CRM integrations.

When It's Called

After the call ends, HMS Sovereign:

Generates an AI summary of the conversation

Runs structured analysis (if analysis_plan was configured)

Sends the report to your webhook

Request Payload

{
  "message": {
    "type": "end-of-call-report",
    "timestamp": "2025-12-13T12:05:30.000Z",
    "call": {
      "id": "5c4d030f-43e3-4e65-899e-8148521e660f",
      "type": "inbound_phone_call",
      "status": "ended"
    },
    "phone_number": {
      "number": "+31850835037",
      "name": "HMS Sovereign Demo"
    },
    "customer": {
      "number": "+31612345678"
    },
    "duration_seconds": 84,
    "summary": "Klant vroeg naar openingstijden en wilde een afspraak maken voor volgende week.",
    "analysis": {
      "sentiment": 8,
      "hoofdonderwerp": "Afspraak maken",
      "vraag_beantwoord": true,
      "gesprek_kwaliteit": "Goed"
    }
  }
}

Payload Fields

Field	Type	Always Present	Description
`duration_seconds`	integer	Yes	Total call duration
`summary`	string	Yes	AI-generated summary
`analysis`	object	No	Structured analysis (if configured)

Response

The response body is ignored. Return any 2xx status code to acknowledge receipt.

Analysis Configuration

To get structured analysis, configure analysis_plan on your assistant:

{
  "analysis_plan": {
    "structured_data_plan": {
      "enabled": true,
      "schema": {
        "type": "object",
        "properties": {
          "sentiment": {
            "type": "integer",
            "minimum": 1,
            "maximum": 10,
            "description": "Customer sentiment score 1-10"
          },
          "intent": {
            "type": "string",
            "enum": ["support", "sales", "complaint", "other"]
          },
          "resolved": {
            "type": "boolean",
            "description": "Whether the customer's issue was resolved"
          },
          "follow_up_needed": {
            "type": "boolean"
          }
        }
      },
      "messages": [
        {
          "role": "system",
          "content": "Analyze the call transcript according to the provided schema. Return valid JSON matching the schema."
        },
        {
          "role": "user",
          "content": "Schema: {{schema}}\n\nTranscript: {{transcript}}\n\nCall ended because: {{ended_reason}}"
        }
      ]
    },
    "min_messages_threshold": 5
  }
}

Analysis Plan Fields

Field	Description
`structured_data_plan.enabled`	Enable/disable analysis
`structured_data_plan.schema`	JSON Schema for output
`structured_data_plan.messages`	Prompt template with placeholders
`min_messages_threshold`	Min conversation messages before running

Available Placeholders

Placeholder	Description
`{{schema}}`	Your JSON Schema
`{{transcript}}`	Full call transcript
`{{ended_reason}}`	Why the call ended

Use Cases

Sync call summaries to CRM

Track customer sentiment over time

Identify sales opportunities

Measure call quality

Detect escalation needs

Build analytics dashboards

Example Implementation (Node.js)

See EndOfCallReportPayload Schema and AnalysisPlan Schema for complete details.

When It's Called#

Request Payload#

Payload Fields#

Response#

Analysis Configuration#

Analysis Plan Fields#

Available Placeholders#

Use Cases#

Example Implementation (Node.js)#