why do I get "Invalid appsecret_proof provided in the API argument" - facebook

Question

Since the latest change on Facebook, regarding the appsecret_proof: https://developers.facebook.com/docs/reference/api/securing-graph-api/, we are still unable to download performance reports even after enabling/disabling features from Advanced Settings in our app, or apply the code as described in their document.
We are constantly getting this error:
{"error":{"message":"Invalid appsecret_proof provided in the API argument","type":"GraphMethodException","code":100}}
and I've open a confidential bug but no one returns to me with an answer.
I really don't know what more could we try?

Answer 1

The error is (based on my experience) almost certainly correct; it means you're proving an invalid appsecret_proof with your API call
Assuming you're using the standard PHP SDK without modifications, the most likely reasons for this are:
You configured the wrong app ID in the SDK code
You configured the wrong app secret in the SDK code
You're trying to use an access token from the wrong / another app

Answer 2

Another potential cause of the "Invalid appsecret_proof ..." error, is a user access token that is not associated with an app. If you are generating a user access token using the graph explorer, make sure to select an app from the dropdown on the top right corner. Otherwise, you will be generating tokens that only work within the graph API explorer.
I filed a bug with the Python SDK before I caught my mistake. GUIs are the devil.

Answer 3

No bug in the latest version of the facebook PHP SDK.
You need to create appsecret_proof as per the docs:
$appsecret_proof= hash_hmac('sha256', $access_token, $app_secret);
then pass it as a parameter to your api call.
See the docs here: https://developers.facebook.com/docs/graph-api/securing-requests/
Once I did this all was good and I didn't have to hack base_facebook.php

Answer 4

There is a bug in the Facebook SDK. After 20 hours of trying everything to debug my own code (which had no issues!), I commented this out in base_facebook.php:
/* Commented out by SJ
if (isset($params['access_token'])) {
$params['appsecret_proof'] = $this->getAppSecretProof($params['access_token']);
}
*/
And all the problems went away!

Answer 5

This is error is because of in correct token. It may be because you are using different account for configuring web app and mobile app for Facebook configuration. Both accounts should be same.
The app ID must be the same for your mobile app and your web app.

Answer 6

This error is the result of setting incorrect access token. For e.g posting to page album using a user's(admin's) access token. I have solved this error almost all the times by setting the proper access token

Answer 7

If this error is unexpected behavior, you may have checked a setting in your app to require it. Uncheck it and you should stop getting that error. That setting is in settings -> advanced and is called "App Secret Proof for Server API calls". Set that to NO.
As of now, that setting is on this page (make sure to put your appId in the URL): https://developers.facebook.com/apps/YOUR-APP-ID/settings/advanced/
Note this is not a universal solution, only a solution for people who don't want that behavior.

Answer 8

For me it was three fixes that made it work
Activate the Secret app and Access to API in the advanced configuration of your app in Facebook for developers. Although in theory it is not needed for me it always prompted that the appsecret_proof was needed even when those two options were off.
When creating the appsecret_proof, the access_token used to create it should be the same access_token to send in the request, and its the user access_token, my error was that I was using the app access_token. Use the user access_token.
Send the parameter appsecret_proof as appsecret_proof, not as app_secret_proof. A minor detail but happened to me.
Extra:
For python you can create the appsecret_proof like this:
import hmac
import hashlib
facebook_app_secret = '<your_app_secret>'
facebook_access_token = '<your_user_access_token>'
appsecret_proof = hmac.new(facebook_app_secret.encode('utf-8'),
msg=facebook_access_token.encode('utf-8'),
digestmod=hashlib.sha256).hexdigest()
print(appsecret_proof)
Gotten from facebook graph api calls with appsecret_proof in python

Answer 9

make sure your setting correct fbappid + fbappsecret
this error happens when those are not set correct
like you have 2 apps one development and one production
and you mess up the codes, double check those two

Answer 10

Just for people having the same problem;
When you set Client OAuth Login to "yes" on facebook, you should give proper Valid OAuth redirect URIs . Otherwise facebook throws exactly the same error.

Answer 11

In my case I needed to set Default Access Token via method: setDefaultAccessToken()
I used token generated in GraphApi dev tool but I did not switch into proper application. It was solved by changing application into proper one and using regenerated token.

Answer 12

I know that this is an old question but I solved mine by changing the Application to the proper application that I should be generating an access token with. E.g. from Project1 to Project2.

Answer 13

Perhaps something wrong with your access token, you need Business Manager style.
You can get the token from the content of https://business.facebook.com/settings/system-users/{sys_user_id}?business_id={business_id} with regex r'"accessToken":"([\d|\w]+)","context"'

Answer 14

Works for me:
$appsecret_proof = hash_hmac('sha256', $facebook_page_token, $app_secret);
WHERE facebook_page_token is the page token stored in my database created when I associate the page to the app.

Answer 15

Problem comes from wrong platform access token.
You should check your dashboard which you preferred to API and check your access token where it comes from.