# 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.

- Canonical: https://extractfeed.io/story/stagehand-python-adds-webmcp-tool-support-inside-iframes-d633a05/
- JSON: https://extractfeed.io/api/v1/stories/stagehand-python-adds-webmcp-tool-support-inside-iframes-d633a05.json
- Beat: Agents & MCP · Evidence: Primary source · Type/significance: release/2 · First seen: 2026-09-05T14:57:13.276496+00:00 · Updated: 2026-09-05T14:57:13.276496+00:00 · Edition: 2026-09-06
- Framing: model-written (headline, standfirst, why it matters, tags); source facts deterministic

## 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 \(\#2878\)](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.1.0a0.dev1495)

## Watch next
Will this iframe support be backported to the Node.js Stagehand SDK?

Topics: Stagehand, WebMCP, stagehand, webmcp, iframes, browser-automation, python

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