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Question

Meta Capi Integration Failing

  • February 8, 2026
  • 0 replies
  • 9 views

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Hi,

I am trying to integrate Meta Conversion API using the steps in the documentation. I have said up everything on Metas side and see general install data flowing in. I am currently still in development of my app and using the Test Store for subscriptions.

I see the requests coming back Response 400 in the RevenueCat dashboard with the following error:

 

Response body

{"error":{"message":"Invalid parameter","type":"OAuthException","code":100,"error_subcode":2804043,"is_transient":false,"error_user_title":"Invalid extended device info parameter","error_user_msg":"You are sending a device information with wrong 'extinfo version' or 'OS version'. Please refer to https:\/\/developers.facebook.com\/docs\/graph-api\/reference\/application\/activities\/#parameters for more details.","fbtrace_id":"AvGtc5A3lYjP9sqP7guRLhh"}}Since you are the ones handling the payload I can’t do anything about this.Request:
 

{

"access_token": "EAAa1ZAw...krOJf...",

"data": [

{

"action_source": "app",

"app_data": {

"advertiser_tracking_enabled": true,

"application_tracking_enabled": true,

"extinfo": [

"a2",

"",

"",

"0.1",

"Version 26.3 (Build 23D5114d)",

"",

"en-US,en;q=0.9",

"",

"",

0,

0,

"",

0,

0,

0,

""

],

"vendor_id": "672525D5-84BD-41D9-BF77-787E35C59EF8"

},

"custom_data": {

"content_ids": [

"monthly"

],

"content_type": "product",

"contents": [

{

"id": "monthly",

"quantity": 1

}

],

"currency": "USD",

"order_id": "effdb3c01643b28f10a2ee3800421483227387f3",

"value": 9.99

},

"event_id": "effdb3c01643b20421483227387f3",

"event_name": "Subscribe",

"event_time": 1770480391,

"user_data": {

"anon_id": "XZ2B9F980ADA0A7",

"em": "f14ce28c87a6087831b3e5b7f8bbbbb6ff703d4d4605",

"external_id": "e9cf07b3761aa0767f86efa36e6215e55fee3e491fa2fd"

}

}

],

"partner_agent": "revenuecat"

}