Curated UX corpus over MCP
Provides a specific corpus of UX rules that agents can query through MCP instead of relying on broad, generalized design advice.
Rubric
Freemium
Rubric is a curated UX corpus served to coding agents over MCP. It helps agents design against documented UX rules, then audit live pages against those same rules—with findings, severity levels, and fixes.
What is Rubric?
Rubric serves a curated UX corpus to coding agents over MCP. It is designed to help agents work from specific UX rules rather than general design advice, so they can make decisions based on documented guidance.
The same corpus is used before and after launch: agents can pull guidelines while designing, then audit a live site against the same rules and produce findings with severity, evidence, and suggested fixes.
What can Rubric do?
Design-time guideline retrieval
Lets agents fetch prescriptive UX guidance before code is built, including what the rule is, why it matters, and what breaks without it.
Live-site auditing
Evaluates a real page against the same checklist used at design time and returns findings ranked by severity.
Structured findings output
Returns findings as separate blocks that include the issue, severity, impact, actions, and references rather than a single paragraph summary.
Streamable HTTP MCP server
Runs as a standard MCP server over streamable HTTP, which the site says works with any MCP client that speaks the protocol.
Claude Code plugin support
Includes a plugin flow that installs the MCP connection and supports UX audit and reporting tasks from Claude Code.
Use Cases
“Guide a new build with UX rules”
Use Rubric before implementation to pull relevant guidance for a component or flow, so the agent designs to the corpus rather than guessing from general UX advice.
“Audit a shipped checkout or form flow”
Run a live page through the checklist after release to identify issues, rank them by severity, and generate a report that can be handed to the team fixing them.
“Support automated QA in CI or scheduled jobs”
Use the HTTP server with a bearer token when no browser can open, such as in CI or a cron job, to run the same audit workflow in automated environments.
“Standardize review across MCP tools”
Connect Rubric from an MCP-compatible client such as Claude Code, Codex, Cursor, Windsurf, Zed, Cline, Goose, or Manus to keep the same UX rules available across tools.
Frequently Asked Questions
What does Rubric do?
Rubric provides a curated UX corpus to coding agents over MCP, then uses the same corpus to audit live pages against the same rules and report findings with severity and fixes.
How do you connect it to an agent?
The site says you can add it as an MCP server over streamable HTTP, or install the Claude Code plugin that wires up the connection for you.
Does it work only with Claude Code?
No. The site says any MCP client works, and it lists Claude Code, Codex, Cursor, Windsurf, Zed, Cline, Goose, and Manus as compatible clients.
What does a finding include?
A finding is presented as separate blocks, including the issue, severity, impact, actions, and references.
Is there a free plan?
Yes. The pricing page shows a free tier, a pay-as-you-go usage-based plan, and an enterprise option with invoicing and volume terms.
Quick Facts
- Category
- Developer Tool
- Primary use
- UX guidance and auditing for coding agents
- Protocol
- MCP over streamable HTTP
- Setup options
- Direct server connection or Claude Code plugin
- Pricing model
- Free tier, usage-based pay-as-you-go, and enterprise
- Source domain
- rubric.design
Rubric Traffic Analysis
Traffic data is for reference only.
- Domain Rating
- 0
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