We’ve been building MCP Apps for ChatGPT and have hit two separate bugs that, combined, make the platform essentially unusable for production apps. We are following the recommended approach from the MCP Apps compatibility guide , which positions MCP Apps as the standard way to build app UIs going fo…

Thanks for the continued reports here. The team shipped a fix for the tool-result `_meta` delivery issue, so this should now be resolved. If anyone is still seeing `_meta` missing in ChatGPT on a fresh test, please open a new support case by emailing support@openai.com and include this forum thread,…

The old way is the inefficient way of putting the HTML in the context and polluting right ? or is there any other way ?

not sure to get it, there never was any solution including putting html in the context

Thanks for the detailed report. We’re tracking the reports around MCP Apps tool result metadata and refresh behavior. Because deeper troubleshooting may require app-specific or account-specific details, please don’t post user IDs, org/workspace IDs, API keys, HAR files, private logs, request traces,…

Hi. In order to be able to investigate this issue and provide with a fix, the engineering team is looking for a specific that can be used. If you are still experiencing this issue and can help with the request, please write an email to support@openai.com with this forum URL, the related repro links,…

Do not put secrets, user data, large private payloads, or account-specific debug artifacts into model-visible fields. Then please just make sure that the whole tool result message makes it to the widget like it did before. We have an app that worked, and now I’m having to work around this. I don…

Hi there. Sorry to read that. The team is still investigating and working on fixing this issue. To help with the investigation, please file a new support case writting an email to support@openai.com with this forum URL, the related repro links, and any minimal non-sensitive reproduction details you …

Hey all, sorry this took so long–to be frank, it took me a bit of time personally to understand why this was an issue (I spend more time on the top-level MCP spec rather than the apps extension). A fix to this should be out in the next couple of days, I’d say try again on Tuesday. Thank you for bein…

This should be deployed now, please let me know if it doesn’t work.

Thanks! Can you clarify what was fixed? The missing _meta or the widgets not surviving page refresh?

My app is still not finding _meta in chatgpt. In Claude _meta is available to the ui

MCP Apps in ChatGPT are fundamentally broken - 2 critical bugs

ChatGPT Apps SDK

casey-chow May 27, 2026, 9:14pm 21

Do you have a reproducible example? A small MCP server on tinymcp.dev that fails to render would be helpful to track this down.

Topic		Replies	Views
ChatGPT MCP Apps bridge drops custom _meta from tool results in ui/notifications/tool-result ChatGPT Apps SDK	7	263	May 2, 2026
MCP Apps: ui/notifications/tool-result missing _meta in ChatGPT ChatGPT Apps SDK	4	217	May 30, 2026
Bug Report: ChatGPT strips _meta from tool results and breaks MCP Apps viewUUID state persistence pattern ChatGPT Apps SDK chatgpt , bug , apps-sdk , chatgpt-apps	3	186	May 1, 2026
Chat GPT App - not reading the mcp tool's metadata anymore ChatGPT Apps SDK chatgpt-app , apps-sdk	7	1227	December 2, 2025
Widget renders blank — no code changes ChatGPT Apps SDK widget	11	331	May 26, 2026

MCP Apps in ChatGPT are fundamentally broken - 2 critical bugs

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