Access Token

If you are using your own Facebook App, you need to have a page access token to connect your Facebook page with WOZTELL. Follow the steps to get a Long-Lived Page Access Token.

Add Permissions

1. Go to Graph API explorer at https://developers.facebook.com/tools/explorer.

2. Select your app in the Facebook App dropdown menu.

Graph API Explorer

3. Click the User or Page dropdown and select Get User Access Token.

Get User Access Token

4. Login Facebook to continue.

Facebook Login

5. Choose the permissions you want to add to the App (manage_pages and publish_pages are necessary for the comment reply post).

Add Permission

On May 5, 2020, Facebook released six new Page permissions to replace the manage_pages and publish_pages permissions. The manage_pages permission has been replaced with pages_manage_ads, pages_manage_metadata, pages_read_engagement, and pages_read_user_content. The publish_pages permission has been replaced with pages_manage_posts and pages_manage_engagement

6. The permissions will be added to the Permissions section and highlighted in green after selection. Click “Generate Access Token”.

Generate Access Token

7. Login Facebook to grant access and subscribe the Pages to the App.

Facebook access step 1

Facebook access step 2

Facebook access step 3

8. The permissions will be shown in black after access is granted.

Permission Granted

Get a Long-Lived User Access Token

9. Replace the request with below information from your App.

• graph-api-version: Get the latest Graph API Version from Facebook Documentation (https://developers.facebook.com/docs/facebook-login/access-tokens/refreshing#get-a-long-lived-page-access-token)
• app-id: Find in the setting page of your App (https://developers.facebook.com/apps/)
• app-secret: Find in the setting page of your App
• your-access-token: Copy the access token after step 8 is completed

https://graph.facebook.com/{graph-api-version}/oauth/access_token?grant_type=fb_exchange_token&client_id={app-id}&client_secret={app-secret}&fb_exchange_token={your-access-token}

Sample request

https://graph.facebook.com/v7.0/oauth/access_token?grant_type=fb_exchange_token&client_id=6582005811111111&client_secret=80b242b5054b814b2911313&fb_exchange_token=EAAJWoUQZBX7UBAGwEHkPekYtwB3sZCOcRPqV1ZCTNr3VVZAIdx308zTUsXz613CaK9kvQrFwn6VgEqtsLGZAhEfVLjZCSkOiYZCSm93ZB7Dw6M7sU4FVMNG6H0i

10. Copy the request and paste the link to a browser and press enter.

Copy the request to a browser

11. You have got a Long-Lived User Access Token for getting a Long-Lived Page Access Token later.

Sample response

{"access_token":"EAAJWoUQZBX7UBAP21eOSh6dKOrXAbYmoNSovjU74fGQT3dGvLW6txhZAGj01of72VMr7ZAZAnUwFcSSbo1FpnnFEmgH1KvaFfwBITUgZBkuhaiusd28378hkjhagfqislk","token_type":"bearer","expires_in":5183283}

12. Go to Access Token Debugger at https://developers.facebook.com/tools/debug/accesstoken/ and enter the access token to check for more details. Also copy the App-Scoped User ID for later use.

Long Lived User Access Token

13. Go back to the Graph API explorer and click Get Token drop down again and select your Page. This will exchange your User access token for a Page access token.

Get Page Access Token

14. Use the API call on the left panel. Select “GET” and submit me/subscribed_apps to check for current subscriptions. If there is no “feed” in “subscribed_fields”, please continue the following steps. If there is ”feed” in the selected page, you could use the comment post on that page.

Remarks: Please repeat steps 13 and 14 to check the current subscriptions for each page.

Check Subscriptions

Sample API response

{
  "data": [
    {
      "link": "https://stella.sanuker.com/botBuilder",
      "name": "Chatbot",
      "id": "71161167223443",
      "subscribed_fields": [
        "messages",
        "messaging_postbacks",
        "messaging_optins",
        "message_deliveries",
        "message_reads",
        "messaging_account_linking",
        "messaging_referrals",
        "standby",
        "messaging_handovers"
      ]
    }
  ]
}

15. Add the subscription to page by copying the existing “subscribed_fields” and adding “feed” using the below format.

feed,messages,messaging_postbacks,messaging_optins,message_deliveries,message_reads,messaging_account_linking,messaging_referrals,standby,messaging_handovers

16. Use the API call in the left panel. Select “POST” and submit me/subscribed_apps?subscribed_fields=(the existing subscribed_fields+feed).

Add New Subscriptions

me/subscribed_apps?subscribed_fields=feed,messages,messaging_postbacks,messaging_optins,message_deliveries,message_reads,messaging_account_linking,messaging_referrals,standby,messaging_handovers

17. API will return success after submission.

Return Success after Submission

18. Call GET me/subscribed_apps again to confirm your page subscription, "subscribed_fields" now should contain “feed”.

Return Success after Submission

Sample API response

{
  "data": [
    {
      "link": "https://stella.sanuker.com/botBuilder",
      "name": "Chatbot",
      "id": "711611672717008",
      "subscribed_fields": [
        "feed",
        "messages",
        "messaging_postbacks",
        "messaging_optins",
        "message_deliveries",
        "message_reads",
        "messaging_account_linking",
        "messaging_referrals",
        "standby",
        "messaging_handovers"
      ]
    }
  ]
}

Get a Long-Lived Page Access Token

19. Replace the request with below information from your App.

• graph-api-version: Get the latest Graph API Version from Facebook Documentation (https://developers.facebook.com/docs/facebook-login/access-tokens/refreshing#get-a-long-lived-page-access-token)
• user-id: Copy the App-Scoped User ID from step 12
• long-lived-user-access-token: Copy the access token from step 11

https://graph.facebook.com/{graph-api-version}/{user-id}/accounts?
  access_token={long-lived-user-access-token}

Sample request

https://graph.facebook.com/v7.0/101634300234343443/accounts?access_token=EAAJWoUQZBX7UBAP21eOSh6dKOrXAbYmoNSovjU74fGQT3dGvLW6txhZAGj01of72VMr7ZAZAnUwFcSSbo1FpnnFEmgH1KvaFfwBITUgZBs8sZCpAPjusg7d3bde7gf82if78u3daf38fjfb6vejnv9enc

20. Copy the request and paste the link to the browser and press enter. You have got a Long-Lived Page Access Token for connecting the Facebook page to WOZTELL.

Sample response

{
   "data": [
      {
         "access_token": "EAAJWoUQZBX7UBAOjvHEupUAk7GxoEHIFNm9ldwMExpwxO7OQSwisGPtvLyKnl040pBZAbhR62TKMxsZAhPx8pwzmMMzX0yeHOjxcWaxz0WUyZA03sxUnlqlPkjhasd73hdjkh82hd8dh7dgfl19",
         "category": "E-commerce website",
         "category_list": [
            {
               "id": "1756049*******",
               "name": "E-commerce website"
            }
         ],
         "name": "Testing Page",
         "id": "11079******",
         "tasks": [
            "ANALYZE",
            "ADVERTISE",
            "MODERATE",
            "CREATE_CONTENT",
            "MANAGE"
         ]
      }
   ],
   "paging": {
      "cursors": {
         "before": "MTEwNzk2NDI3MjE0NDA5",
         "after": "MTEwNzk2NDI3MjE0NDA5"
      }
   }
}

21. Go to Access Token Debugger at https://developers.facebook.com/tools/debug/accesstoken/ and enter the access token to check for more details.

The Type is “Page”, the Expires field should be “Never” and the Valid is “True”. Copy the full access token and update the access token in the Channel of WOZTELL botbuilder.

22. You could now build your comment reply post in your page! 🎉🎉

All access tokens may become invalid before they expire even non-expiring Page access tokens under certain circumstances. If a password changes, if the user who requested the token no longer has a role on the app or Page, or when a security issue has been detected, an access token will become invalid.

You could check the expiry date and the validity of an access token in the Access Token Debugger at https://developers.facebook.com/tools/debug/accesstoken/