Hey all, Excited to announce that we’re loosening our snapshotting rules. Previously, MCP widget HTML was snapshotted at the time of submission and served entirely from cache. We are loosening this requirement so that changes to widgets do not require a resubmission. Please note however that chang…

Welcome update. Will “cache-busting” mechanisms implemented by some MCP servers serving widgets work? The “cache-busting” mechanism in question is where MCP servers update the template uri if anything changes in the widget code itself so OpenAI always fetches the latest widget html. Will this beco…

[image] saadzafar: Welcome update. Will “cache-busting” mechanisms implemented by some MCP servers serving widgets work? Yes, cache-busting will work. Not sure what you mean by obsolete?

Widget updates no longer require an update submission

ChatGPT Apps SDK

casey-chow April 28, 2026, 9:29pm 5

Yes, cache-busting will work. Not sure what you mean by obsolete?

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Widget updates no longer require an update submission

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