Google Stitch
Google Stitch is an AI interface-design service exposed through an MCP Streamable HTTP endpoint using JSON-RPC 2.0, with named tools for projects, screens, artifacts, and design systems.
What agents can do
Actions16
Apply design system
Apply one design system to 1-20 unique typed screen instances from Get Project.
Create design system
Create a typed Stitch design system from explicit current theme fields.
Create design system from design md
Create a project design system from the exact screen instance returned by Upload Design Markdown.
Create project
Create a Stitch project container for UI designs and return its project resource name.
Delete project
Permanently delete one Google Stitch project.
Download file
Retrieve bounded HTML or screenshot content using a provider-owned Stitch file resource name.
Edit screens
Apply one text-directed edit to up to 20 existing Stitch screens and return every changed screen or clarification question.
Generate screen
Generate screens from a bounded text prompt in an existing Stitch project.
8 moreFewer
Generate variants
Generate 1-5 variants for up to 20 unique source screens with exact creative-range, aspect, device, and model enums.
Get project
Get one Stitch project by full resource name, including screen instances needed for design-system application.
Get screen
Get one Stitch screen by full resource name and return bounded screen metadata plus provider-owned HTML and screenshot file references.
List design systems
List complete Google Stitch design systems for one project.
List projects
List complete Google Stitch projects owned by the connected account or explicitly shared with it.
List screens
List all screens currently returned for one Stitch project, including safe HTML and screenshot file resource references.
Update design system
Replace a Stitch design system's display name and typed nondeprecated theme for one project.
Upload design md
Upload bounded UTF-8 DESIGN.md content to a Stitch project and return the screen instance required by Create Design System From Markdown.
How it connects
You paste an API key from Google Stitch on a page Composio hosts, so the key never passes through Definable.
Keep the connection to yourself or share it with your workspace. Any action that writes or sends can wait for your approval.
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