Prepare an ordered plan.
Country configuration and the supplied recipient determine eligible channels. A delivery failure can advance through that plan automatically.
Another channel. The same verification.
Keep the customer moving when a code does not arrive. Use the next eligible channel without restarting the verification’s expiry or attempt budget.
Another channel.
The same verification.
Keep signup moving when the first code does not arrive. Use the next eligible channel in the recipient’s plan.
A
+1 555 123 4567One recipient · Two eligible channels
- WhatsAppDelivery failedFailed
- SMSNext eligible channelCode sent
Continue on SMS
The recipient can now enter the code.
Change the delivery.
Preserve the session.
Give an undelivered code another configured route.
Respond to the customer’s request.
When the customer reports that nothing arrived, call next-channel with the original recipient. This deliberate switch does not wait for the resend cooldown; it moves only to a later eligible channel.
Handle an exhausted plan.
NoNextChannel means there is no later route; a resend on the current channel may be appropriate. Preserve the original expiry, check budget and all still-valid codes rather than creating competing sessions.
Scale without
losing control.
Organize teams in workspaces, control API access, and trace changes through audit logs.
HarborOrganizationWorkspacesProductionSandbox
Delivery agent
API key · Customer operations teamALAlex Lee AdminPermissions updated
Audit log
Production- Workspace
- Production
- Resource
- Delivery agent
- Read accessRead & write
Team Customer operationsActor role AdminOutcome SucceededTime 22 Sep, 09:42:18 UTC
Succeeded