---
title: "Stagehand: user agent, token, block rate | Agent Ready Crawlers"
description: "Stagehand from Browserbase: no robots.txt token, task agent purpose and what a site can check; no exact user-agent string is published. Read 2026-11-04."
canonical: https://agentreadycrawlers.com/crawlers/stagehand
site: "Agent Ready Crawlers"
last_updated: 2026-11-04
section: "Crawlers"
---

# Stagehand: user agent, token, block rate | Agent Ready Crawlers

> Stagehand from Browserbase: no robots.txt token, task agent purpose and what a site can check; no exact user-agent string is published. Read 2026-11-04.

Source: https://agentreadycrawlers.com/crawlers/stagehand
Site: Agent Ready Crawlers
Last reviewed: 2026-11-04

Browsing agent from Browserbase

# Stagehand (open-source framework)

In short

Stagehand (open-source framework) is Browserbase's browsing agent. Stagehand has no robots.txt token, so robots.txt cannot address it and the crawl cannot measure a block rate. The operator publishes nothing a site can check. Stagehand has no operator bot documentation, checked 2026-11-04. Identity comes from the hosting browser, not the framework.

Operator

[Browserbase](https://agentreadycrawlers.com/crawlers/operator/browserbase/) Vendor profile: [Browserbase](https://agentreadycrawlers.com/vendors/browserbase/)

Purpose

Task agent [All task agent rows](https://agentreadycrawlers.com/crawlers/purpose/task-agent/). A browsing agent that clicks, fills forms and finishes a job for a person.

User-agent string

No exact string is published. What the operator or a third party says: Inherits the browser it runs in; signed only when run on Browserbase with Web Bot Auth

robots.txt token

None. No robots.txt line can address this agent.

Respects robots.txt

No documentation

operator publishes no bot documentation (checked 2026-11-04) for Stagehand itself. [Source](https://docs.stagehand.dev/), read 2026-11-04.

Operator publishes no bot documentation (checked 2026-11-04).

Verification

Nothing published

The operator publishes no list, reverse DNS pattern or key directory a site owner can check. [Documentation](https://docs.stagehand.dev/), read 2026-11-04.

IP ranges

Not published.

Rate behaviour

Set by the developer.

Block rate

None: the agent has no token, so a robots.txt block rate does not exist.

Documentation

Operator publishes no bot documentation (checked 2026-11-04). [Closest page read](https://docs.stagehand.dev/).

Note. Identity comes from the hosting browser, not the framework.

## Allow and refuse lines

This agent has no robots.txt token, so there are no lines to copy. Without a token, a published list or a signature, a site owner cannot tell it from an ordinary visitor by request alone.

Refusing or allowing in robots.txt states a preference. For this row the operator or its documentation says robots.txt may not govern the fetch, so enforcement belongs in your WAF.

## Browserbase in the Verification Ledger

Key directory; signing is a customer feature. [All operators](https://agentreadycrawlers.com/verification/).

IP lists

publishes nothing

Reverse DNS

publishes nothing

Key directory

https://www.browserbase.com/.well-known/http-message-signatures-directory

Cloudflare

Cloudflare signed agent (cohort of 2025-08-28)

Visa TAP registry

no public operator-level registration found (checked 2026-11-04)

Mastercard Agent Pay

no public operator-level registration found (checked 2026-11-04)

## Other Browserbase rows

-   [Browserbase cloud browsers](https://agentreadycrawlers.com/crawlers/browserbase/) Task agent no token

## Sources

-   [docs.stagehand.dev: docs.stagehand.dev](https://docs.stagehand.dev/) read 2026-11-04
-   [docs.browserbase.com: overview](https://docs.browserbase.com/platform/identity/overview) read 2026-11-04

Last reviewed 2026-11-04