WebMCP vs Relay
Let AI control your browser securely
Use AI on real websites with per-tab access, live activity visibility, and one-click disconnect. When a site exposes native browser tools, use them. When it does not, Relay keeps the session connected and under control.
Controlled Access
Grant AI access to a single active tab, while other tabs, history, passwords, and bookmarks stay out of reach.
Visible Sessions
Watch actions live in the activity log and cut the connection with one click.
Coverage Beyond Native
Handle pop-ups, new tabs, restrictive networks, and long-running sessions, even on sites with no WebMCP support.
How ProxyBase Relay complements WebMCP
WebMCP natively exposes structured tools inside the live tab. Relay provides orchestration across tabs, deep observability, and extensive coverage for non-compliant sites.
| Topic | WebMCP | ProxyBase Relay |
|---|---|---|
| Core model | Native browser standard for websites to expose structured tools to the browser agent in the active tab | Browser extension bridge that connects AI assistants to the browser with CDP-style control and session features |
| Depends on site adoption | Yes, the website has to expose WebMCP tools | No, it can still operate on sites that have not implemented WebMCP |
| Scope | Frontend, live-tab, page-scoped actions | Live browser session control across tabs, pop-ups, and ongoing sessions |
| User control features | Chrome docs focus on tool exposure and execution, not Relay-style monitoring or kill switch controls | Per-tab permissions, activity log overlay, one-click disconnect |
| Multi-tab and pop-ups | Not the main value proposition in the Chrome guidance | Explicitly handles new tabs and social-login pop-ups with tab multiplexing |
| Long-running sessions | Tab-bound and ephemeral while the page is open | Designed to keep a continuous connection tunnel alive for longer tasks |
| Best fit | Sites that intentionally expose clean, structured actions | Real-world browser work where sites are inconsistent, legacy, or not WebMCP-enabled |