Browser Run - Browser Run adds WebMCP to Kitesurf and moves to document.modelContext

<p><a href="https://developers.cloudflare.com/browser-run/features/webmcp/">WebMCP</a> now works in <a href="https://developers.cloudflare.com/browser-run/kitesurf/">Kitesurf</a> sessions as well as <a href="https://developers.cloudflare.com/browser-run/features/webmcp/#get-started">Lab sessions</a>. Both backends use the <code>document.modelContext</code> API from the <a href="https://webmachinelearning.github.io/webmcp/" target="_blank" rel="noopener">WebMCP Community Group draft<span class="external-link"> ↗︎</span></a>. Lab sessions no longer expose <code>navigator.modelContextTesting</code>.</p> <p>To list and run page tools:</p> <ul> <li><strong>Chrome DevTools</strong>: Use the <strong>Application</strong> &gt; <strong>WebMCP</strong> panel in the live view of a Lab session or in the <a href="https://kitesurf.dev/" target="_blank" rel="noopener">Kitesurf playground<span class="external-link"> ↗︎</span></a>.</li> <li><strong>AI agents</strong>: Start <a href="https://developers.cloudflare.com/browser-run/features/webmcp/#using-an-ai-agent">Chrome DevTools MCP</a> with the <code>--category-experimental-webmcp</code> flag to add the <code>list_webmcp_tools</code> and <code>execute_webmcp_tool</code> tools.</li> <li><strong>CDP clients</strong>: Use the <code>WebMCP</code> CDP domain.</li> </ul>