based on the explainer there has been no security review. Are any W3C reviews in process? I couldn't tell if anyone was addressing/prototyping A2A?
I believe this would be a privacy nightmare for any user of a browser enabling this and will create a threat model for W3C SING if no one is currently underway. Peace ..tom jones On Mon, Feb 9, 2026 at 4:40 PM Chromestatus <[email protected]> wrote: > *Contact emails* > [email protected], [email protected], [email protected], > [email protected] > > *Explainer* > https://github.com/webmachinelearning/webmcp > > *Specification* > *No information provided* > > *Summary* > WebMCP is a proposal for a web API that enables web pages to provide > agent-specific paths in their UI. With WebMCP, agent-service interaction > takes place via app-controlled UI, providing a shared context available to > app, agent, and user. > > *Blink component* > Blink>Agentic Platform>WebMCP > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EAgentic%20Platform%3EWebMCP%22> > > *Web Feature ID* > Missing feature > > *Search tags* > WebMCP <http:///features#tags:WebMCP> > > *Risks* > > > *Interoperability and Compatibility* > Given this is a new space and new API - there's no compatibility risk. > Usual risk related to other browser vendors not adopting the API apply. > This API is meant to augment capabilities provided by browser add-ons and > so non-adoption in other engines would have limited user-impact and thus we > consider the risk to be low. > > *Gecko*: No signal > > *WebKit*: No signal > > *Web developers*: No signals > > *Other signals*: > > *WebView application risks* > > Does this intent deprecate or change behavior of existing APIs, such that > it has potentially high risk for Android WebView-based applications? > *No information provided* > > > *Debuggability* > WebMCP will raise issues to a DevTools WebMCP Panel to help surface > configuration errors, such as malformed structured schemas, improper > function registration, and failed actuation attempts by the agent. > > *Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, ChromeOS, Android, and Android WebView)?* > Yes > > *Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* > No > The IDL and basic usage is tested via WPTs. Since the API provides the > user agent with the ability to call certain tools, we might need to extend > the WPT harness to support this. > > *DevTrial instructions* > > https://docs.google.com/document/d/1rtU1fRPS0bMqd9abMG_hc6K9OAI6soUy3Kh00toAgyk/edit?tab=t.0 > > *Flag name on about://flags* > Experimental Web Platform features > > *Finch feature name* > WebMCP > > *Requires code in //chrome?* > True > > *Tracking bug* > https://crbug.com/445637567 > > *Estimated milestones* > DevTrial on desktop 146 > > *Link to entry on the Chrome Platform Status* > https://chromestatus.com/feature/5117755740913664 > > *Links to previous Intent discussions* > Intent to Prototype: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CANMmsAtRdyRw1WtO5va0K%3D_adYH-FRh01xvw5%2BosSd_DAq%3D%3DUQ%40mail.gmail.com > > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com>. > > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/698a7e93.050a0220.29f6fd.0504.GAE%40google.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/698a7e93.050a0220.29f6fd.0504.GAE%40google.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAK2Cwb51e%3DwR-fgt0ir%3DDUuhpLSMOOR_0npzb1Fvw6mv2vg78Q%40mail.gmail.com.
