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Use the Calls API to start a batch of outbound calls and to end an active call by its session ID. Every request requires a workspace API key in the X-API-Key header. The API key determines the workspace, so these paths do not include a workspace ID.

Start outbound batch

POST /v1/calls/batch — accept up to 1,000 recipients for immediate or scheduled calling.

End active call

POST /v1/calls/{roomId}/end — end the active session identified by roomId.
Recipient metadata carries string values into the call. Check acceptedRecipients and rejectedRecipients in the batch response before treating a submission as fully accepted.