Android ChatGPT app error after before tools/call

I don’t use Android myself, but here’s something that I found and that might be worth checking, if you already haven’t that is.

Since the app works on browser/iOS and your server receives initialize, tools/list, resources/list and resources/read, but no tools/call ever reaches your server on Android, this sounds like the failure may be happening inside the ChatGPT Android client before tool invocation.

The Apps SDK docs mention that linked connectors are available on mobile clients too and recommend testing mobile layouts early:

developers.openai.com

Connect from ChatGPT – Apps SDK | OpenAI Developers

Connect your app to ChatGPT clients.

What I’d collect (if you haven’t):

• Android device/model and OS version
• ChatGPT Android app version
• connector/app ID if available
• exact timestamp/timezone
• whether this happens on Wi-Fi and mobile data
• whether refreshing connector metadata changes anything
• server logs showing the successful initialize/list/read calls and missing tools/call

It may also help to compare the same app through MCP Inspector or API Playground, since those can show raw request/response behavior:

developers.openai.com

Test your integration – Apps SDK | OpenAI Developers

Testing strategies for Apps SDK apps.

If it only fails on Android after those checks, I’d report it to OpenAI Support.