Exposing WebMCP Tools to External AI Agents

[Best Codes (BestCodes)]

I have a very general and superficial knowledge of WebMCP and how it works (mostly from working with the imperative API), so sorry if this is already covered by the docs or seems obvious 😅
From what I understand, WebMCP is a great way for AI agents within the browser to interact with websites. Websites expose specialized MCP tools on a per-website basis rather than a general "read_html" tool (for example) for all websites. So this works great for a built-in browser assistant (e.g. Gemini) but how are these tools supposed to be exposed to external agents, such as Claude Code or goose? Will there be some sort of protocol for this, will users have to install a Chrome extension or something..?

Thanks in advance!

[François Beaufort]

See https://groups.google.com/a/chromium.org/g/chrome-ai-dev-preview-discuss/c/DvpCALkf8oQ/m/ftpI1N0gBAAJ

[Best Codes (BestCodes)]

Thanks!

[Kathy Hurchla]

Is there any other way to read that discussion please, François? I’ve tried unsuccessfully to request access to view messages on the actual Google Group and can only read what comes through email.

Kathy Hurchla

AI Engineering & Data Science Lead

linkedin.com/company/fantasy
fantasy.co

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[François Beaufort]

Sure! Here's what I wrote:

WebMCP folks are discussing whether exposing executeTool() to WebMCP would make sense at https://github.com/webmachinelearning/webmcp/issues/51#issuecomment-3975725141

[Kathy Hurchla]

Ah, thank you. It does seem most issues/questions come back tolistTools and executeTool 

Kathy Hurchla

AI Engineering & Data Science Lead

linkedin.com/company/fantasy
fantasy.co