Supabase Edge Function container cannot connect to local auth service (ETIMEDOUT)

[prince-dataslush]

Hello,
I am having a persistent networking issue with my local Supabase development environment. My Edge Function container is unable to make a network request to the local Supabase auth service.

What I'm trying to do:
An Edge Function needs to validate the user by calling supabaseClient.auth.getUser().

The Problem:
This call consistently fails with a Connection timed out (os error 110) or ECONNREFUSED error, depending on the URL I use. The function is unable to resolve the connection to the auth service.

My Setup:
I am running the latest Supabase CLI.
I am running Docker on [Your Operating System, e.g., Ubuntu, Windows with WSL2, etc.].
Here is what I have tried for the Supabase URL inside the function's .env file:
http://localhost:54321: Fails with Connection refused (os error 111).
http://host.docker.internal:54321: Fails with Connection timed out (os error 110).
Using the Docker network gateway IP (<your_ip_here>): Also fails with Connection timed out (os error 110).

Here is a sample error log from my supabase functions serve terminal:
[Error] TypeError: error sending request for url (http://...): client error (Connect): tcp connect error: Connection timed out (os error 110)

This seems to be a fundamental Docker networking issue with how the function container is set up by the CLI on my machine. Could you please advise on the correct networking configuration?

Thank you.

[brettahale]

If you are setting the Supabase url manually, use this instead Deno.env.get("SUPABASE_URL") Dont set this in your env file or use the localhost/127.0.0.1 address.

[carlosleal89]

Thanks @brettahale . I was having the same issue and your solution worked here.