Stagehand Python adds WebMCP tool support inside iframes
Stagehand Python's latest dev release enables discovery and invocation of WebMCP tools registered inside iframes by routing calls through the main CDP session and all adopted OOPIF sessions.
Briefing
- browserbase/stagehand releases: Stagehand Python's latest dev release enables discovery and invocation of WebMCP tools registered inside iframes by routing calls through the main CDP session and all adopted OOPIF sessions.
Why it matters
Iframes have long been a blind spot for browser automation tools, especially when they host embedded agents or tool interfaces. By extending WebMCP support into cross-process iframes, Stagehand closes a gap that could block agent workflows on complex, widget-heavy pages. This is a targeted fix for a specific integration pain point, not a broad feature release.
Sources
- Primary source · browserbase/stagehand releases · 2026-09-03 — browserbase/stagehand stagehand-python@4.1.0a0.dev1495: [feat]: add support for WebMCP tool invokation in iframes (#2878)
Watch next
Will this iframe support be backported to the Node.js Stagehand SDK?