Steel MCP Server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| STEEL_LOCAL | No | Determines if Steel Voyager runs in local (true) or cloud (false) mode. | false |
| STEEL_API_KEY | No | Required only when STEEL_LOCAL = false. Used to authenticate requests with the Steel endpoint. | |
| STEEL_BASE_URL | No | The base URL for the Steel API. Override this if self-hosting the Steel server (either locally or in your own cloud environment). If STEEL_LOCAL = true and STEEL_BASE_URL is unset, it defaults to http://localhost:3000. | https://api.steel.dev |
| GLOBAL_WAIT_SECONDS | No | Optional. Number of seconds to wait after each tool action (for instance, to allow slow-loading pages). |
Schema
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| navigate | Navigate to a specified URL |
| search | Perform a Google search by navigating to https://www.google.com/search?q=encodedQuery using the provided query text. |
| click | Click an element on the page specified by its numbered label from the annotated screenshot |
| type | Type text into an input field specified by its numbered label from the annotated screenshot. Optionally replace existing text first. |
| scroll_down | Scroll down the page by a pixel amount - if no pixels are specified, scrolls down one page |
| scroll_up | Scroll up the page by a pixel amount - if no pixels are specified, scrolls up one page |
| go_back | Go back to the previous page in the browser history |
| wait | Use this tool when a page appears to be loading or not fully rendered. Common scenarios include: when elements are missing from a screenshot that should be there, when a page looks incomplete or broken, when dynamic content is still loading, or when a previous action (like clicking a button) hasn't fully processed yet. Waits for a specified number of seconds (up to 10) to allow the page to finish loading or rendering. |
| save_unmarked_screenshot | Capture a screenshot without bounding boxes and store it as a resource. Provide a resourceName to identify the screenshot. It's useful for when you want to view a page unobstructed by annotations or the user asks for a screenshot of the page. |