Chat free inference · gpt-4o-mini · tools auto-routed
Connect a server, then ask for something its tools can do — e.g. "weather in tokyo" or "top hacker news stories". Tools with a
ui:// resource render as an app below.
App stage
no app rendered
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MCP Apps render here — inside a separate-origin sandbox proxy, the way SEP-1865 demands.
host → iframe[sandbox] on → iframe[sandbox=allow-scripts] srcdoc