SMS.to API 4

• SMS API
• API Restrictions, Rules and Responses
• Bulk SMS and Webhooks
• Secure API Keys

Webhooks and Callbacks 5

• What are Webhooks/Callbacks?
• Outbound Message Status Callbacks/Webhooks
• Inbound Message Status Callbacks/Webhooks
• Opt-Out Callbacks/Webhooks
• Secure Webhooks and Callbacks

SMSto Maintenance & Status 1

• SMS.to Status page