Stagehand is a software development kit for browser agents that automate websites through Playwright-style APIs and natural-language actions. It is for building browser automation in TypeScript, Python, and Go, and the catalogue entries support its use as a skill, MCP integration, and instruction.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add browserbase/stagehand --skill stagehand-facadegit clone --depth 1 https://github.com/browserbase/stagehandWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/browserbase/stagehand/stagehand-facade)<a href="https://agentmods.dev/skills/browserbase/stagehand/stagehand-facade"><img src="https://agentmods.dev/badge/skills/browserbase/stagehand/stagehand-facade/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/browserbase/stagehand/stagehand-facade"><img src="https://agentmods.dev/badge/skills/browserbase/stagehand/stagehand-facade.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.00330 |
| Opus 5.5 | $0.00017 | $0.00132 |
| Sonnet 5.5 | $0.00008 | $0.00066 |
| Haiku 4.5 | $0.00004 | $0.00033 |
Grade A, and why
stagehand-facade scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
In fx, the tools are registered as mcp_stagehand_run, mcp_stagehand_snapshot, and
mcp_stagehand_screenshot. Select them with mcp_select_tool using those exact names before
calling them; mcp_search_tools may return no results for this server, so do not rely on it.
Never invent another Stagehand tool name. There is no separate stagehand_navigate,
mcp_stagehand_navigate, or start tool.
You control one persistent browser through exactly three tools:
- snapshot: inspect the active page and hydrate bracketed element IDs.
- run: browse or navigate with JavaScript (for example,
await page.goto(url)) or provide snapshot actions using the Playwright-shaped page API. The first call initializes the browser. - screenshot: inspect the rendered page visually. Prefer viewport JPEG with
{"type":"jpeg","quality":40,"fullPage":false}; inline full-page PNGs may exceed fx's MCP response-frame limit.
Use snapshot actions for simple interactions and run code for multi-step workflows. Pass run exactly one of code or actions; every action uses "op" and "id", never "kind" or "ref". Snapshot IDs are valid only for the latest snapshot of the active page; snapshot again after navigation or stale IDs. Do not launch another browser.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 22 lines · 42 tokens per session scan A e273519b4f8d
stagehand-facade is a skill published in the GitHub repository browserbase/stagehand (25,728 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 330 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
moli-webfetch
Fetch, inspect, crawl, and capture live, JavaScript-rendered websites with Moli. Use when Codex needs current web content, web research, fact lookup, link following, a bounded crawl, client-rendered or response-gated content, network diagnostics, or a standalone HTML, Markdown, JSON, semantic-tree, viewport or…
moli-websearch
Search the web by keyword or reverse-search images with Moli to find subjects, sources, exact matches, or similar images—even when Moli is not named. For fetching a known URL, use moli-webfetch.
moli-cdp-server
Start Moli's CDP server and connect Playwright, Puppeteer, or raw CDP clients. Use to run a headless-browser CDP endpoint, replace a Chromium process, attach over CDP, enable real layout and screenshot surfaces, or diagnose CDP discovery, connection, and target startup—even when Moli is not named.
webcmd-browser
Use when a live browser task requires Playwright interaction, authenticated handoff, visible UI verification, or ad-hoc page inspection.
browser_harness
../../SKILL.md.
compatibility-testing
Cross-browser, cross-platform, and cross-device compatibility testing ensuring consistent experience across environments. Use when validating browser support, testing responsive design, or ensuring platform compatibility.