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I'm trying to send a message from my app to a user using the Send API. I have the user_id from reading the userId when a message was sent to the page.

However, when I try to send a message using the Send API I get the error: 

Failed calling Send API 400 Bad Request { message: '(#100) No matching user 
found',
type: 'OAuthException',
code: 100,
error_subcode: 2018001,
fbtrace_id: 'GmBQFOIlkFS' }

I saw on this link that a lot of these errors might be because "the page scoped ID does not belong to the app used for this request."

The problem is that I'm not quite sure what that means.

I thought it might be because my webhook is on my website, but I was trying to send from localhost:3000. But then whether I tried sending it from my local server or from the server online, I get the same error code.

Tom Neill
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  • It means you need to have received this user id from the webhook via the same app in the first place. – CBroe Jun 13 '17 at 13:56
  • OK maybe I'm a bit confused. I received the user id from both a messenger opt-in plugin, and from messaging the page. The user id was the same for both. I thought the user id was page scoped, not app scoped? I don't know where I've specified whether to use the development test app or the real thing. – Tom Neill Jun 13 '17 at 22:13

0 Answers0