External app, tool or account · Build MCP Apps
An MCP Apps host
Show and test your widget in a host that supports MCP Apps.
How it fits
Widget acceptance needs a current host that supports MCP Apps and its real browser and bridge behavior. The workflow tests locally first, then names the checks only a real host can confirm.
Maintained by: Your AI app
Connect it
Use a current host that supports MCP Apps and register your server there. Note its surface and build so results can be compared.
Read connection setup →Try asking
Check whether this widget expands correctly and sends its selection in my host.
Guidance checked in Build MCP Apps 1.0.5. Host behavior depends on your host version.
Know the limits
A simulated host test isn't proof of live delivery. Approving a screenshot is visual approval only.