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How to use Developer Key for OAuth2 Authentication?

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So I'm the admin of a Canvas test server, and want to set up OAuth2 authentication for my webpage.
I've generated a developer key after logging into "" and setting up a developer key from there. Let's call the developer key "myTestKey".
And in my code, I made a redirect to the website like this:

However, the result I get is this:

while(1);{"error":"invalid_client","error_description":"unknown client"}

Is this not the correct use of a developer key? How should I be using it instead to get authentication?

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Community Champion

When you say "Let's call the developer key "myTestKey",what are you actually using for the client_id?

It should be the key's actual ID, maybe something like 9900000000123.

In case its of any use, we have a test site at 

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17 Replies
Community Champion

When you say "Let's call the developer key "myTestKey",what are you actually using for the client_id?

It should be the key's actual ID, maybe something like 9900000000123.

In case its of any use, we have a test site at 

View solution in original post

Community Participant

Peter, thank you very much for the reply. 

For the client ID, I have tried two different things so far:
1) the ID of a client when I make a client using Laravel Passport and my homestead database
2) and the actual Developer Key I have generated. Neither have worked.

I actually didn't realise developer keys have IDs of their own. Where can I see these? The only traits I see on my Canvas page's Developer Key section for my developer keys are a key's name, its key value, and its owner email. Image here: 

Thank you very much for the test site link.

EDIT: I feel embarrassed now, but it just dawned on me. The value in the Details section. The one before you hit "Show Key." That's not the key in a condensed form. That's the actual ID for the developer key.

I put this in now, where it asked for my client ID, and it seems to have gotten past that issue. I've gotten a new error now: "while(1);{"error":"invalid_request","error_description":"redirect_uri does not match client settings"}" 

Since that isn't tied to this thread's original question, I'll consider this answered. But if you've any advice on that error, I'd appreciate that.

Community Champion

If you edit the key, you will see a box on the left for "Redirect URIs".   Have you put your URL in there?

Community Participant

I have put it there, as well as in the Redirect URI (legacy) box. Here is a screencap

This also matches the redirect URI in the code that points to Canvas' OAuth2 authentication.

I will note that these redirects work for other elements. Namely, if I change my redirect route to any other page, it works. If I point to any other redirect route that I've coded, it also works.

This block of code - which I'm initially asking Canvas to redirect to after authorisation - is the problem. I was advised on this block of code by numerous laravel passport tutorials and official documentation. I'm aware laravel is not the specialty of many people here, but in case it is of use:

Route::get('/callback', function (Request $request) {
   Log::info("Entered callback");
   $state = $request->session()->pull('state'); //is returning null
      strlen($state) > 0 && $state === $request->state,

   $http = new GuzzleHttp\Client;
   $response = $http->post('', [
      'headers' => [
         'Accept' => 'application/json',
      'form_params' => [
         'grant_type' => 'authorization_code',
         'client_id' => '10', //only a client ID in my laravel homestead database
         'client_secret' => 'DKwYRnNg30GVcIYKiRRwtPpCIiVb8FBYZft5iBYqx', //corresponding client secret for laravel database
         'redirect_uri' => '',
         'code' => $request->code,

      return json_decode((string) $response->getBody(), true)['access_token']; //returns null

I was recommended to use Passport in order to be able to use OAuth2 on Canvas, but now I'm wondering if there was some confusion, if that recommendation was accurate to my problem. If my project is already using Canvas, and I can make clients on it, and I can authorise those clients, is Passport essentially doing the same thing? Is this essentially a redundancy?

EDIT: It might also be worth noting that, even in the cases of successful redirects by the OAuth2 server, I'm not sure where to see the access token that I hear is generated.

Community Champion

Seem to be mixing up lots of stuff here.

Anyway, if you are still getting "redirect_uri does not match client settings" try changing your code so the redirect uris are the same:

    'redirect_uri' => '',

Community Participant


pklove‌  @sam_ofloinn ‌

I am new in the canvas world, I am trying to add our web app to canvas as it has to be used by a University in England by January.

I found this recent post the most helpful for now, but I still have some points would appreciate if someone can help me out figuring out them.

First of all I configured our app to be able to work with ( Authorization code grant ) which I assume the right thing to do for now, but I can not get to the point to find where i can test it through Canvas, does it have a developer mode so i can have the tokenUrl and the authorizationUrl to test out my set up. We are using Javascript stack , node js, express as a server and react in the frontend.

Any useful tips would be appreciated.



At a guess, perhaps Postman might be what you need.. I don't use it myself, but I hear it recommended for reading the values of URLs, tokens, and testing them quickly. It is universal with other languages, so those techs shouldn't be a burden on it.

That said, I don't have enough details about your problem to give any further help

 @sam_ofloinn ‌ Thanks Lee for your answer.

As a matter of fact i need more than postman, what I was asking for is how to send real requests from Canvas to our app using kind of test environment, I am not part of institution or educational organisation so I do not have developer key privilege and could not figure out a way to generate it and reach out the test environment. 

So to have Canvas in test environment do I have to have it on my local machine and try it out from there, cuz i need to configure the ClientId, Secret and get the TokenUrl, authorizationUrl all that in a test environment to test out my set up and to see the actual responses that we will be getting when we have our app getting used by canvas in a production environment.

If there is unclarity please let me know as I am trying to get my hands on it but the resources are not that clear.


Community Participant

Hi Peter

Even though in my other post you mentioned I do not need to use Auth, I am still trying to do it.

Do I need to use OAuth  )

So from my webpage that has my app, I am making an http  Get call  to


as an attempt to implement the first stage of the Oauth2 and get a code.

( "myinstitutesite" is just for example, I am using our real cloud name ).

( 80580000000001111 is  the developer key ID that I crated in the account as admin, modified a bit for this example ).

( someotherpageicrated is the URL of another webpage I crated. I made sure it is identical to the 'redirect uri' on the developer key ).

Loading the page, what really supposed to happen ? I am still getting the same page with the same URL, no error message but also no different URL string .

Since I am both the admin and the app developer, am I doing something wrong?  

Aside of creating the Developer key, I did not crate my app on any Canvas platform, just on my web page.

Was I supposed to register it in any other way? if yes then how?