How to use OAuth (Bearer Token) Authentication in Azure Functions
This article help you to understand how bearer token is validating in your azure function. First you need to understand what is the Bearer token ? "Bearer Token is used to authenticate your API's and token is in base 64 URL encoded value, some servers will issue tokens that are a short string of hexadecimal characters, while others may use structured tokens such as JSON Web Tokens. for more details on Bearer token click here . Note : Bearer Token should be send via request headers to your azure function. Validate your Bearer Token: First Create Application ID in Azure Active directory and generate client id & secrete and reply url. Click here to understand how to create app id in Azure active directory. Next create a Azure Http trigger function and add below code in your function. public async Task<IActionResult> Run ([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req, ILogger log) ...