> For the complete documentation index, see [llms.txt](https://developer.9bits.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.9bits.net/messaging.md).

# MESSAGING

- [A2P SMS](https://developer.9bits.net/messaging/a2p-sms.md)
- [Overview](https://developer.9bits.net/messaging/a2p-sms/overview.md)
- [Start sending A2P SMS](https://developer.9bits.net/messaging/a2p-sms/start-sending-a2p-sms.md): Send and receive SMS through a single connection for timely and cost efficient communications.
- [Getting Started](https://developer.9bits.net/messaging/a2p-sms/getting-started.md): Summary
- [REST API](https://developer.9bits.net/messaging/a2p-sms/rest-api.md)
- [Overview](https://developer.9bits.net/messaging/a2p-sms/rest-api/overview.md)
- [Batches](https://developer.9bits.net/messaging/a2p-sms/rest-api/batches.md)
- [Delivery Reports](https://developer.9bits.net/messaging/a2p-sms/rest-api/delivery-reports.md)
- [Retrieve a delivery report](https://developer.9bits.net/messaging/a2p-sms/rest-api/delivery-reports/retrieve-a-delivery-report.md)
- [Webhooks](https://developer.9bits.net/messaging/a2p-sms/rest-api/webhooks.md): Callbacks
- [SMPP](https://developer.9bits.net/messaging/a2p-sms/smpp.md)
- [Connectivity](https://developer.9bits.net/messaging/a2p-sms/smpp/connectivity.md)
- [Sending Messages](https://developer.9bits.net/messaging/a2p-sms/smpp/sending-messages.md)
- [Message Encoding](https://developer.9bits.net/messaging/a2p-sms/smpp/message-encoding.md): Default SMSC Encoding
- [SMPP Error Codes](https://developer.9bits.net/messaging/a2p-sms/smpp/smpp-error-codes.md)
- [Two-Way SMS](https://developer.9bits.net/messaging/two-way-sms.md)
- [Overview](https://developer.9bits.net/messaging/two-way-sms/overview.md)
- [Start receiving Two-Way SMS](https://developer.9bits.net/messaging/two-way-sms/start-receiving-two-way-sms.md): Receive SMS using a Two-Way short code through a single connection for timely and cost efficient communications.
- [Start sending Two-Way SMS](https://developer.9bits.net/messaging/two-way-sms/start-sending-two-way-sms.md): Send SMS using a Two-Way short code through a single connection for timely and cost efficient communications.
- [Getting Started](https://developer.9bits.net/messaging/two-way-sms/getting-started.md): Summary
- [REST API](https://developer.9bits.net/messaging/two-way-sms/rest-api.md)
- [Overview](https://developer.9bits.net/messaging/two-way-sms/rest-api/overview.md)
- [Webhooks](https://developer.9bits.net/messaging/two-way-sms/rest-api/webhooks.md): Callbacks
- [WhatsApp](https://developer.9bits.net/messaging/whatsapp.md)
- [Overview](https://developer.9bits.net/messaging/whatsapp/overview.md)
- [Telegram](https://developer.9bits.net/messaging/telegram.md)
- [Overview](https://developer.9bits.net/messaging/telegram/overview.md)
- [Tutorials](https://developer.9bits.net/messaging/tutorials.md)
- [Add Sender ID](https://developer.9bits.net/messaging/tutorials/add-sender-id.md)
- [Create contact groups](https://developer.9bits.net/messaging/tutorials/create-contact-groups.md)
- [Send SMS](https://developer.9bits.net/messaging/tutorials/send-sms.md)
- [View Insights](https://developer.9bits.net/messaging/tutorials/view-insights.md)
- [View Report](https://developer.9bits.net/messaging/tutorials/view-report.md)


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