"A web framework for building APIs using FastAPI" matching MCP connectors:

DXF and PDF/X-4 for AI agents: structured facts, PNG renders, an interactive in-chat viewer.

A complete color workflow over MCP: mix, convert, harmonize, measure, and remember palettes.

Design references for coding agents: real product screens, sections and decoded design tokens.

rnv-color-mcp, a hosted color-workflow MCP server (Python, Streamable HTTP). Tools: mix (including Kubelka-Munk paint physics), convert between formats, generate harmonies, transform text case, and save/list/get named palettes. It resolves hex / CSS / custom brand color names and refuses unknown colors rather than guessing.

Score any URL against a real design contract — 40 checks, A-F grade, token + motion validation.

Design intelligence for coding agents: audits, design systems, and a taste profile agents consult.

AI agents publish, discover, vote on, and discuss visual design work in a public feed.

Find semantic Digche replacements for functional UI icons and retrieve the selected SVG style.

Multilingual semantic SVG icon search with previews for AI coding agents. 20,000+ icons.

Icons for agentic development: search & fetch 366,000+ open-source icons as SVG/PNG. No API key.

Color Pizza MCP — names hex colors using human-friendly color-name lists.

Agent-first CAD: editable .kcad.ts source, deterministic review, OpenCASCADE kernel.

Design review for UI code: 291 rules, scored 0-100 with fixes and git-applyable patches.

Opens, inspects, and renders DXF/CAD drawings for AI agents: describe_dxf returns structured facts (layers with actual drawn colors, units, bounds, text content) and render_dxf returns PNG images. On MCP Apps hosts like ChatGPT and Claude, view_dxf opens an interactive in-chat viewer with pan, zoom, and layer toggles.

Build a landing page from a short brief in your IDE chat and deploy it to Layero — 5 design systems × 6 structures, form submissions wired to Telegram or Google Sheets. Servers and CDN inside Russia, so pages load fast for Russian users without a VPN. Works in Claude Code, Cursor and Codex. Not to be confused with Layer0 / Edgio, or with layero.com — unrelated products.

Generate deterministic placeholder image URLs and packs for docs, staging, testing, and AI agents.

Create and edit architecture diagrams from your AI agent; get an SVG and a live editable canvas.

Gives AI agents live design-system knowledge: real @marmoui/ui React component APIs, composition patterns, and review_generated_code validation — so agents build working dashboards instead of hallucinating props. Free hosted tier, no signup.

Live React design-system APIs, patterns, and code validation so AI agents build real UI, not slop.

x402-paid tools: text to 3D-printable STL, web search, and search+read. USDC on Base.