Extension Changelog
What's new in UCP Checker
Every release of the UCP Checker browser extension. Free, open-source, and updated continuously based on user feedback.
Polished popup UI & refined visual identity
Improved
- Wider 400px popup layout with cleaner information hierarchy
- Domain and status now split into distinct sections
- New orbit mark icon and refined badge pills throughout
- Monospace version line for the spec version display
- Polished install/checkout buttons with subtle hover states
Added
- Playground link for verified stores — open a live agent shopping session in one click
- Updated extension and homepage screenshots showing the new popup design
Capabilities, transports & payment handlers in the popup
Added
- Capability detection — see which UCP capabilities the store declares (checkout, cart, catalog, fulfillment, etc.) directly in the popup
- Transport types shown for every verified store (REST, MCP, A2A, Embedded)
- Payment handler list pulled from the manifest
- Cross-links to the new Tools Compared and Developer Tools pages
Improved
- Faster manifest parsing for stores with large capability declarations
- Aligned terminology with the rest of UCP Checker (MCP Tools rename)
Welcome & uninstall feedback flow
Added
- Welcome page opens automatically on first install with setup steps and example stores
- Uninstall feedback survey at
/extension/goodbyeso we can learn why people leave - Source attribution on background checks so we can track extension-driven traffic separately
Improved
- Updated README with clearer onboarding details and permission explanations
Permission cleanup
Fixed
- Removed the
scriptingpermission from the manifest — never used, removing it improves Chrome Web Store review trust and signals our path-scoped privacy stance
Initial release
Added
- Automatic UCP manifest detection on every storefront you visit
- Green/gray badge icon for instant UCP status at a glance
- "View Status" link to the full diagnostic report on ucpchecker.com
- "Run Check" button to perform a fresh live verification from the popup
- AI bot policy display for GPTBot, ClaudeBot, Google-Extended, Apple Intelligence, and CCBot
- Optional anonymous uptime stats sharing to help crowdsource the global directory
- Path-scoped permissions — only
https://*/.well-known/ucp*