Who actually supports WebMCP today
Browsers, AI agents, frameworks, cloud browsers, extensions, and publishers, tracked against the real WebMCP spec, not vendor marketing. Every entry below is checked and dated.
Last verified: September 23, 2026
Browsers
Desktop and mobile browsers that can expose WebMCP tools to an agent running alongside the page.
ChromeOrigin trialAiming for Chrome 157
Aiming for Chrome 157
EdgeOrigin trial"Ready for testing", says Microsoft
"Ready for testing", says Microsoft
BraveBehind a flagPublicly demoed in Nightly
Publicly demoed in Nightly
LightpandaPartial supportBuilt in, but at the old address
Built in, but at the old address
FirefoxNo supportMozilla position: neutral
Mozilla position: neutral
SafariNo supportWebKit position: opposed
WebKit position: opposed
Comet, Dia, Sigma, FellowNo signalNo public statement
No public statement
AI agents & assistants
Chat and browsing assistants that call WebMCP tools on a user's behalf.
Brave LeoBehind a flagPublicly demoed in Nightly
Publicly demoed in Nightly
Gemini in ChromeNot usable yetNothing shipped, nothing promised in writing
Nothing shipped, nothing promised in writing
Claude for ChromeNo supportReads the page, not its tools
Reads the page, not its tools
ChatGPT WorkWorks todayCalls page tools – seen in our own use
Calls page tools – seen in our own use
ChatGPT desktop appWorks todayNative "site tools", on by default
Native "site tools", on by default
Codex Chrome extensionBehind a flagWorks if you switch on CDP access
Works if you switch on CDP access
Perplexity CometNo signalNothing public
Nothing public
Opera NeonNo signalPoints the other direction
Points the other direction
PUBLISHES ONLY
Sider, Monica, HARPA AINo signal5M, 3M and 300k installs
5M, 3M and 300k installs
Frameworks & SDKs
Web frameworks and SDKs that help site owners register WebMCP tools.
StagehandWorks todayTypeScript, on a browser it launches
TypeScript, on a browser it launches
Vercel agent-browserWorks todayOn by default, in a Chrome it launches
On by default, in a Chrome it launches
Browser UseWorks todayAnnounced 6 Sep, on their hosted agents
Announced 6 Sep, on their hosted agents
CLOUD AGENTS
Chrome DevTools MCPBehind a flagTwo tools, once you switch it on
Two tools, once you switch it on
PuppeteerBehind a flagChrome 151 and up, flag required
Chrome 151 and up, flag required
Cloudflare Browser RunBehind a flagTest pool only
Test pool only
ALSO PUBLISHES
Playwright & Playwright MCPNo supportAsked for, declined for now
Asked for, declined for now
FirecrawlNo supportNo product support; a documented workaround
No product support; a documented workaround
Browserbase platformNo signalNo documented way to enable it
No documented way to enable it
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Run a free scanPrefer raw data? Every published entry above is also available read-only via the Supabase REST API:GET https://wbmlnabhbxkyouicvnlw.supabase.co/rest/v1/ecosystem_public (send an apikey header; no auth required).