browser_use - Stackone

Any action whose steps[] includes browser_use must declare executionMode: async on the action. The runtime enforces this — a sync action containing browser_use fails schema validation at build time.

Input

v1

Field	Description	Type	Required
`auth`	Credential handling for the browser task.	object	No
`budgets`	Execution limits the task must run within.	object	Yes
`locale`	Locale the browser session runs in.	string	No
`startUrl`	URL where the browser session begins. Format: `uri`	string	Yes
`systemPrompt`	Author-defined preamble, persona, and guardrails applied to every invocation.	string	No
`viewport`	Browser viewport dimensions.	object	No

auth

Credential handling for the browser task.

Field	Description	Type	Required
`allowedDomains`	Overrides the default allowed-domains policy, for auth flows that cross a domain boundary.	string[]	No
`requiresSession`	Reserved for tasks that need a pre-authenticated browser session rather than form substitution. Not yet in use.	boolean	No
`sensitiveKeys`	Credential keys masked from the LLM and substituted only at the typing layer.	string[]	No

budgets

Execution limits the task must run within.

Field	Description	Type	Required
`maxDurationMs`	Maximum task duration in milliseconds.	integer	Yes
`maxSteps`	Maximum number of steps the agent may take.	integer	Yes

viewport

Browser viewport dimensions.

Field	Description	Type	Required
`height`	Viewport height in pixels.	integer	Yes
`width`	Viewport width in pixels.	integer	Yes

Output

v1