HTTP Triggers and Authentication in Power Automate

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HTTP Triggers and Authentication in Power Automate


Microsoft Power Automate, previously known as Microsoft Flow, is a cloud-based service that allows you to automate workflows and integrate various applications and services without the need for extensive coding. It enables you to create automated processes, called flows, that can be triggered by various events, including HTTP triggers.

An HTTP trigger in Microsoft Power Automate allows you to start a flow by making an HTTP request to a specific URL. This can be useful for integrating Power Automate with external systems, services, or applications that can send HTTP requests.

HTTP triggers can be secured using various authentication mechanisms to ensure the security and privacy of your workflows. Here are some common authentication mechanisms you can use with Power Automate HTTP triggers:

API Key Authentication

You can require an API key in the HTTP request headers. This key acts as a secret token that identifies the requester and grants access to the trigger. You can validate the API key in your workflow before proceeding with the actions.

OAuth 2.0 Authentication

OAuth 2.0 is a widely used authentication protocol. You can set up OAuth 2.0 authentication for your HTTP trigger, which involves exchanging tokens between the requester and your flow. This is particularly useful when integrating with services that support OAuth, such as Microsoft Graph API.

Azure Active Directory (Azure AD) Authentication

If you want to integrate with Microsoft services and ensure security through Azure AD, you can set up Azure AD authentication. This allows you to verify the identity of the requester using their Azure AD credentials.

Basic Authentication

Basic authentication involves including a username and password in the request headers. While this method is less secure than others, it's simple to implement. However, it's recommended to use more secure methods whenever possible.

Custom Headers and Tokens

You can define your own custom authentication headers or tokens that need to be included in the HTTP request. You would then validate (Read full post on


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