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WebMCP page-native tools for in-browser AI agents

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When the Website Has Its Own MCP Tools — WebMCP in Local and Remote Browser

· 6 min read
Tony Lewis
MCPBundles
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TL;DR​

  • Local Browser and Remote Browser now expose browser_list_webmcp_tools and browser_call_webmcp_tool — your agent navigates to a page, discovers tools registered on document.modelContext, and calls them with JSON input.
  • MCPBundles dogfoods WebMCP on www.mcpbundles.com — the skills catalog registers search_skills, get_skill, and get_connect_url so a browser session can query the marketplace from inside the page, not by guessing DOM selectors.
  • Works in cloud Chrome (Remote Browser) and Desktop Chrome (Local Browser, WebMCP enabled by default) — same navigate → list → call workflow, no separate bridge extension.

Modern sites are not just HTML anymore. Some already publish structured tools the page understands — search the catalog, fetch an entity, return a connect link. WebMCP is how those tools show up to in-browser agents. Until now, MCPBundles browser automation was excellent at clicks, snapshots, and screenshots — but blind to page-native APIs. That gap is closed.