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Last active October 25, 2025 22:50
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Setup Facebook app to test authentication locally (aka, setting up App Domain)
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steps.md

Note: I had issues with setting up my Facebook app so authentication would work. I'd receive the error at the bottom, and it took me a while to figure out what was wrong

Here are the steps I took:

  • Go to http://developers.facebook.com/, create, and setup your app
  • When inside the dashboard, click "Settings"
  • Click "Add Platform"
  • Choose website (for authentication via the web app)
  • Add http://localhost:3000/ as "Site URL" (and "Mobile URL" if necessary)
  • Add localhost to "App Domains" above
  • Click Save

This fixed the error I kept receiving:

Given URL is not allowed by the Application configuration.: One or more of the given URLs is not allowed by the App's settings. It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains.
@kire73
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kire73 commented Aug 30, 2019 •
edited
Loading

This solution worked for me. Trying to add localhost as a "Website" (Platform) in the app settings was being rejected because it didn't match my production domains, which I didn't want to remove.

Even though the message was saying it needed to be among my app domains, it turned out that in

Products -> Facebook Login -> Settings

with Strict Mode enabled, simply adding https://localhost:8000/auth/facebook/callback to the Valid OAuth Redirect URIs allowed me to test the authentication with ssl, locally.

I should probably also note that localhost was already in my "App Domains" in the basic settings (while "https://" and port were being removed when I tried to enter them)

@Ashish-gh23
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Ashish-gh23 commented Jul 4, 2020

Hi I am still stuck with this issue, Can anyone please help me with this
I have added https://localhost:3000/auth/facebook/secrets to valid OAuth REdirect URIs and undeer app domain i have added link of my localhost http://localhost:3000/auth/facebook/secrets..
But still I am getting error as

This site can’t provide a secure connectionlocalhost sent an invalid response.
Try running Windows Network Diagnostics.
ERR_SSL_PROTOCOL_ERROR

@lakhbawa
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lakhbawa commented Mar 13, 2021

Thank you man

@imtechieraj
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imtechieraj commented May 10, 2021

This solution worked for me. Trying to add localhost as a "Website" (Platform) in the app settings was being rejected because it didn't match my production domains, which I didn't want to remove.

Even though the message was saying it needed to be among my app domains, it turned out that in

Products -> Facebook Login -> Settings

with Strict Mode enabled, simply adding https://localhost:8000/auth/facebook/callback to the Valid OAuth Redirect URIs allowed me to test the authentication with ssl, locally.

I should probably also note that localhost was already in my "App Domains" in the basic settings (while "https://" and port were being removed when I tried to enter them)

You Save my life <3

@KES777
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KES777 commented May 15, 2025 •
edited
Loading

It does not work.
image

Also I have this one:
image

but when I navigate from http://localhost it says that
image

🤐

@Anindya007
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Anindya007 commented Oct 22, 2025

Thanks, I was looking for a solution to this pesky problem for quite a few hours and glad I could find yours.

@KES777
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KES777 commented Oct 25, 2025

@Anindya007 yeah, I spent around 2 days to get it setup correctly, but with others I spent less than an hour.

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