> For a complete page index, fetch https://docs.synthflow.ai/llms.txt. For full documentation content, fetch https://docs.synthflow.ai/llms-full.txt. ## Collected Variables (Slots) now available in Post-call Webhooks and Call APIs The `collected_variables` field is now included in post-call webhook payloads and call API responses. This field contains **collected variables (slots)** from your conversation flows, allowing you to access user-provided information programmatically. **Example Response:** ```json { "collected_variables": { "user_name": { "value": "Julian", "collected": true }, "appointment_date": { "value": "2025-10-28", "collected": true }, "user_email": { "value": null, "collected": false } } } ``` **Updated endpoints:** | Endpoint | Title | | ------------------------------------------------------------- | ------------- | | [**GET /calls**](/api-reference/calls/get-all-calls) | Get all calls | | [**GET /calls/\{call\_id}**](/api-reference/calls/get-a-call) | Get a call | **Post-call Webhook:** The `collected_variables` field is now included in the [post-call webhook payload](/webhooks) when configured. **Notes:** * Each variable has a `value` (the collected data) and `collected` (boolean indicating successful collection) * The `collected_variables` field may be `null` if not available for a specific call * Variables are keyed by agent ID, then by variable name