Create a Twilio Flex TaskRouter workflow and task queue via API

Steps

1. Authenticate all Twilio API requests with HTTP Basic Auth using your Twilio Account SID as the username and your Auth Token (YOUR_TOKEN) as the password.
2. Retrieve your Flex Workspace SID with GET https://taskrouter.twilio.com/v1/Workspaces — note the SID of the workspace Flex uses.
3. Create a Task Queue with POST https://taskrouter.twilio.com/v1/Workspaces/{WorkspaceSid}/TaskQueues, providing 'FriendlyName', 'TargetWorkers' (a worker expression filter such as 'skills HAS "billing"'), and 'MaxReservedWorkers'.
4. Create a Workflow with POST https://taskrouter.twilio.com/v1/Workspaces/{WorkspaceSid}/Workflows, providing 'FriendlyName', 'AssignmentCallbackUrl' (your endpoint for task assignment events), and a 'Configuration' JSON string containing routing filters that map task attribute expressions to target task queue SIDs.
5. Test the workflow by enqueuing a task via POST /v1/Workspaces/{WorkspaceSid}/Tasks with a 'Attributes' JSON string that matches your routing filter expressions and a 'WorkflowSid' pointing to the workflow you created.
6. Monitor task state transitions by subscribing to TaskRouter event callbacks on the Workspace — set 'EventCallbackUrl' on the Workspace to receive task.created, task.assigned, and task.completed events.