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Official Source· OpenAI· Published Oct 7, 2026
OpenAI demonstrates custom website annotations with WebMCP
An OpenAI video demonstrates custom website annotation controls and suggested prompts, with examples of scene editing and expense-record enrichment.
Full Report
The video shows how WebMCP can be used to add custom annotation controls and suggested prompts to a website. Examples include editing a scene and enriching expense records using context available to an agent in ChatGPT.
Why This Matters
The demonstration shows how a website can provide controls and prompts for an agent to use in context.
Evidence
Start with the primary evidence, then review supporting sources and context.
Primary Evidence
1Build custom site annotations with ChatGPT
OpenAI
“Add custom annotation controls and suggested prompts to your website. See how these work with WebMCP to help users edit a scene and enrich expense records using context available to their agent in ChatGPT.”
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