# Fb trigger **URL:** \ **Category:** Questions\ **Tags:** trigger, facebook\ **Created:** [July 4, 2022, 7:31am UTC](https://community.n8n.io/t/fb-trigger/15434 "2022-07-04T07:31:44Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 4, 2022, 7:31am UTC](https://community.n8n.io/t/fb-trigger/15434/1 "2022-07-04T07:31:44Z")
Does fb trigger inform about new post on fb page? How does this trigger work? does it run cyclically every now and then or is it triggered by information about the appearance of a new post? ---
**Author:** ![marcus](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/marcus/32/15989_2.png) [@marcus](https://community.n8n.io/u/marcus)\ **Post date:** [July 4, 2022, 7:43am UTC](https://community.n8n.io/t/fb-trigger/15434/2 "2022-07-04T07:43:43Z")
Hi @Max_T, n8n’s Facebook Trigger node is using [facebook’s graph-api webbhooks](https://developers.facebook.com/docs/graph-api/webhooks/reference/page) internally. You can subscribe to a page’s feed field, if you want to be notified about Posts or shares. I haven’t used it myself but facebook’s graph-api webhooks should execute as soon as (or shortly after) changes are made. ![image](https://europe1.discourse-cdn.com/n8n/original/2X/c/c5614ef79a46a189d71c2631af850624176ff72f.png) ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 4, 2022, 7:48am UTC](https://community.n8n.io/t/fb-trigger/15434/3 "2022-07-04T07:48:15Z")
> [@marcus](#): > > n8n’s Facebook Trigger node is using [facebook’s graph-api webbhooks](https://developers.facebook.com/docs/graph-api/webhooks/reference/page) internally. You can subscribe to a page’s feed field, if you want to be notified about Posts or shares. I haven’t used it myself but facebook’s graph-api webhooks should execute as soon as (or shortly after) changes are made. access token and app secret are needed. So I have to do an application on the fb side, I think right? what type of application will it be? ---
**Author:** ![marcus](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/marcus/32/15989_2.png) [@marcus](https://community.n8n.io/u/marcus)\ **Post date:** [July 4, 2022, 7:52am UTC](https://community.n8n.io/t/fb-trigger/15434/4 "2022-07-04T07:52:15Z")
Hi @Max_T, did you try following instructions found here? [Facebook App - n8n Documentation](https://docs.n8n.io/integrations/credentials/facebookapp/) ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 4, 2022, 8:25am UTC](https://community.n8n.io/t/fb-trigger/15434/5 "2022-07-04T08:25:51Z")
I think I have all the information (token, id app, id secret) but it returned an error. ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 4, 2022, 8:26am UTC](https://community.n8n.io/t/fb-trigger/15434/6 "2022-07-04T08:26:31Z")
_Bad request - please check your parameters_ ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 4, 2022, 9:35am UTC](https://community.n8n.io/t/fb-trigger/15434/7 "2022-07-04T09:35:42Z")
I did according to what they wrote there, but something does not work, the trigger cannot connect ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 4, 2022, 10:29am UTC](https://community.n8n.io/t/fb-trigger/15434/8 "2022-07-04T10:29:07Z")
What information are you sending to Facebook? It sounds like it is not happy with something. ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 5:48am UTC](https://community.n8n.io/t/fb-trigger/15434/9 "2022-07-05T05:48:49Z")
authorization token, id app and secret app ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 5, 2022, 7:53am UTC](https://community.n8n.io/t/fb-trigger/15434/10 "2022-07-05T07:53:58Z")
Where do you see bad request? ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 8:45am UTC](https://community.n8n.io/t/fb-trigger/15434/11 "2022-07-05T08:45:37Z")
I have running applications n8n on my computer ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 5, 2022, 8:59am UTC](https://community.n8n.io/t/fb-trigger/15434/12 "2022-07-05T08:59:23Z")
At what stage of your workflow do you see the error message is it on the trigger when executing or in the credential? ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 9:07am UTC](https://community.n8n.io/t/fb-trigger/15434/13 "2022-07-05T09:07:43Z")
how wants to activate workflow ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 5, 2022, 9:50am UTC](https://community.n8n.io/t/fb-trigger/15434/14 "2022-07-05T09:50:11Z")
Does your app in Facebook have access to the page and does Facebook give any indication as to what the issue might be? ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 9:54am UTC](https://community.n8n.io/t/fb-trigger/15434/15 "2022-07-05T09:54:21Z")
it is possible that my application has access to resources other than those needed for automation. I do not know how to check it, anyway there is no information on the fb application side. ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 5, 2022, 10:08am UTC](https://community.n8n.io/t/fb-trigger/15434/16 "2022-07-05T10:08:01Z")
Are you using a user token or a page token? When you see the error message is there a field to show more details as well, I was just playing with it and had the same error and it told me what mistake I had made. ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 10:12am UTC](https://community.n8n.io/t/fb-trigger/15434/17 "2022-07-05T10:12:19Z")
> [@Jon](#): > > Are you using a user token or a page token? access token app secret app id what the module wanted ---
**Author:** ![Jon](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/jon/32/40174_2.png) [@Jon](https://community.n8n.io/u/Jon)\ **Post date:** [July 5, 2022, 10:20am UTC](https://community.n8n.io/t/fb-trigger/15434/18 "2022-07-05T10:20:54Z")
Do you get the little show details link on your error? ![image](https://europe1.discourse-cdn.com/n8n/original/2X/d/d0394dcb0a036d2b8ff29a513f09468befacea88.png) If you do what do you see when you click it? ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 10:23am UTC](https://community.n8n.io/t/fb-trigger/15434/19 "2022-07-05T10:23:49Z")
> [@Jon](#): > > Do you get the little show details link on your error Facebook Trigger: (#15) This method must be called with an app access\_token. ---
**Author:** ![Max\_T](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/max_t/32/14649_2.png) [@Max\_T](https://community.n8n.io/u/Max_T)\ **Post date:** [July 5, 2022, 10:27am UTC](https://community.n8n.io/t/fb-trigger/15434/20 "2022-07-05T10:27:37Z")
> [@Jon](#): > > Are you using a user token or a page token does it mean that these elements are missing user token or a page token ? [Next page](https://community.n8n.io/t/fb-trigger/15434.md?page=2)