Pass `initial_context` to inject runtime data as template variables into the agent's prompt. See [Using initial context](/api-reference/runs#using-initial-context).
Pass `telephony_configuration_id` to route the call through a specific telephony configuration instead of your organization's default. The id is shown on each row in **Telephony configurations** (`https://app.dograh.com/telephony-configurations` for hosted or `http://localhost:3010/telephony-configurations` for local).
This route expects a workflow UUID. Do not pass an API Trigger node UUID here. If you want to execute via an API Trigger node, use [Trigger an outbound agent run](/api-reference/runs/trigger) instead.
Your telephony provider must be configured before outbound calls will connect. See [Telephony](/integrations/telephony/overview) for setup instructions.