chromatic.com
Chromatic is a cloud service for publishing Storybook builds and running visual, interaction, and accessibility tests on UI components. It also hosts published Storybook content, including remote MCP endpoints for coding agents.
Chromatic exposes a Node-based `chromatic` CLI authenticated by a per-project token (or a personal OAuth token in the Visual Tests addon case), plus published Storybook MCP servers on `/mcp` that authenticate with Chromatic OAuth.
- Chromatic CLIdiscovered
Sign in to Chromatic, create or open a project, then copy the secret project token from the project's Manage/Configure page. The docs say you can access it during onboarding or from your project's Manage page, and CI examples store it as CHROMATIC_PROJECT_TOKEN.
Authenticate to Chromatic from a supported client flow, such as the Visual Tests addon or an MCP client, and approve access in the Chromatic sign-in flow. The docs state the Visual Tests addon uses your personal OAuth token after you sign in to Chromatic, and the service exposes OAuth endpoints at `/authorize` and `/token`. Known scopes from authoritative probes: storybook:read, project:read.
conventions · 1/7 published
- integrations.json——
- llms.txt✗
/llms.txt - API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✓https://chromatic.com/.well-known/oauth-protected-resource
- Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing