Starting with Blazor, issue with retrieving access token within the DelegatingHandler

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Learn to handle authentication tokens in Blazor using DelegatingHandler and JWT provider

intermediate Published 24 Jun 2026
Action Steps
  1. Create a custom DelegatingHandler to handle authentication tokens
  2. Inject the JWT provider instance using the IHttpContextAccessor
  3. Use the IHttpContextAccessor to access the HttpContext and retrieve the access token
  4. Configure the DelegatingHandler to use the retrieved access token
  5. Test the DelegatingHandler with a sample request to verify authentication
Who Needs to Know This

Backend developers and Blazor specialists will benefit from understanding how to manage authentication tokens in a DelegatingHandler

Key Insight

💡 Use IHttpContextAccessor to access the HttpContext and retrieve the access token in the DelegatingHandler

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Key Takeaways

Learn to handle authentication tokens in Blazor using DelegatingHandler and JWT provider

Full Article

Probably a beginner question, I have authentication with Identity and a login method that can get the access token and place it in a JWT provider. But because this happens on the UI thread, I can't inject the same JWT provider instance when in the DelegatingHandler since that one is in a different DI scope. I get a different instance which did not get the access token in the login. So no comm with server. I asked chatgpt but it's that point where i
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