mcu-mcp-server

An MCP (Model Context Protocol) server implemented with Express.js that exposes a tool to generate a color scheme from a provided seed color using Google’s Material Color Utilities library.

Evaluated Apr 04, 2026 (16d ago)

Homepage ↗ Repo ↗ Ai Ml mcp mcp-server express color-theory theming material-color-utilities api tooling

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

100

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

TLS/auth/rate limiting are not described. Dependencies include @material/material-color-utilities, MCP SDK, and common Node middleware (cors, dotenv, express). Without explicit guidance, assume default Express behaviors; secure deployment should enforce HTTPS, add authentication/authorization, and set appropriate CORS and input validation around the MCP tool.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You want a simple MCP tool to deterministically derive a Material-style palette from an input seed color and you can host the service yourself.

Avoid When

You need documented auth, rate limits, or strong operational guarantees (SLA, retry semantics) from this package as-is.

Use Cases

• Generate UI color palettes from a single seed color for design systems
• Provide an MCP tool for agents to produce consistent color schemes
• Support rapid theming and prototyping (e.g., web/app theming)

Not For

• Production-grade security-sensitive deployments without additional hardening/auth controls
• Use cases requiring bulk/batched palette generation with documented performance characteristics

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

OAuth: No Scopes: No

No authentication/authorization mechanism is described in the provided README/manifest.

Pricing

Free tier: No

Requires CC: No

No pricing information is provided (appears to be an open-source-style self-hosted package).

Agent Metadata

Pagination

none

Idempotent

True

Retry Guidance

Not documented

Known Gotchas

⚠ Auth, rate limiting, and request/response schemas for the MCP tool are not documented in the provided README/manifest; an agent may need to inspect runtime behavior.
⚠ Only a generic 'POST /mcp' transport endpoint is mentioned; specific tool name/arguments/response fields are not included, so tool invocation may require additional discovery.

Alternatives

Implement the same palette logic as a local library/API call rather than an MCP server Use an existing MCP server/tool registry that already provides authenticated, documented transport endpoints Expose a small REST API wrapper around Material Color Utilities with OpenAPI + robust error/rate-limit documentation

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API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-04-04.