# Partner Onboarding

- [Integrated Onboarding](https://docs.360dialog.com/partner/onboarding/integrated-onboarding.md): This page describes how to get started with triggering Integrated Onboarding to register phone numbers
- [IO Signature](https://docs.360dialog.com/partner/onboarding/integrated-onboarding/io-signature.md): This page describes implementing IO Signature and toggling it on
- [Using Direct Link](https://docs.360dialog.com/partner/onboarding/integrated-onboarding/using-direct-link.md): This page describes how to trigger Integrated Onboarding with a direct link
- [Using Connect Button](https://docs.360dialog.com/partner/onboarding/integrated-onboarding/connect-button.md): This page describes how to use the 360Dialog Connect Button React package to trigger Integrated Onboarding
- [Using Custom IO](https://docs.360dialog.com/partner/onboarding/integrated-onboarding/using-custom-io.md): This page describes how to create a custom Integrated Onboarding trigger on any frontend framework
- [Webhook Events & Setup](https://docs.360dialog.com/partner/onboarding/webhook-events-and-setup.md)
- [Signature Validation](https://docs.360dialog.com/partner/onboarding/webhook-events-and-setup/signature-validation.md): This page describes how webhook signatures can be validated to enhance webhook URL security
- [Webhook Events (Partner & Messaging API)](https://docs.360dialog.com/partner/onboarding/webhook-events-and-setup/webhook-events-partner-and-messaging-api.md): Here you will find real-time Partner and Messaging Webhook events related to WABA, channel, and message activity.
- [Set multiple webhooks for Phone Number](https://docs.360dialog.com/partner/onboarding/webhook-events-and-setup/set-multiple-webhooks-for-phone-number.md)
- [Integration Best Practices](https://docs.360dialog.com/partner/onboarding/integration-best-practices.md)
- [Architecture and Security](https://docs.360dialog.com/partner/onboarding/integration-best-practices/architecture-and-security.md)
- [Sizing Your Environment Based on Expected Throughput](https://docs.360dialog.com/partner/onboarding/integration-best-practices/sizing-your-environment-based-on-expected-throughput.md)
- [Design a Stable Webhook Receiving Endpoint](https://docs.360dialog.com/partner/onboarding/integration-best-practices/design-a-stable-webhook-receiving-endpoint.md): Ensure your service quickly responds to Webhook Notifications
- [Design a Resilient Message Sending Service](https://docs.360dialog.com/partner/onboarding/integration-best-practices/design-a-resilient-message-sending-service.md): Ensure that messages are guaranteed to be sent, and never lost
- [API Key Authentication for the Partner API](https://docs.360dialog.com/partner/onboarding/integration-best-practices/api-key-authentication-for-the-partner-api.md)
- [Partner API Sandbox](https://docs.360dialog.com/partner/onboarding/partner-api-sandbox.md): This page describes how partner API sandbox can be used to send testing messages to a phone number on WhatsApp.
- [Partner-Hosted Embedded Signup](https://docs.360dialog.com/partner/onboarding/partner-hosted-embedded-signup.md): This page describes how partners can host Embedded Signup
- [WhatsApp Coexistence](https://docs.360dialog.com/partner/onboarding/whatsapp-coexistence.md): Clients now have the possibility of onboarding a number to the WhatsApp Cloud API even if it is already connected to the WhatsApp Business App.
- [Coexistence Onboarding](https://docs.360dialog.com/partner/onboarding/whatsapp-coexistence/coexistence-onboarding.md): This section provides details on how to onboard businesses that are already using the WhatsApp Business App and want to expand to the WhatsApp Cloud API.
- [Coexistence Webhooks](https://docs.360dialog.com/partner/onboarding/whatsapp-coexistence/coexistence-webhooks.md): Here you will find information about history webhooks and message echoes for businesses that have been onboarded to both the WhatsApp Business App and the WhatsApp Cloud API simultaneously.
- [Testing different messaging scenarios](https://docs.360dialog.com/partner/onboarding/whatsapp-coexistence/testing-different-messaging-scenarios.md): To help you viewing different use cases, we made a few tests and shared the results below:


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