Coolours MCP Server

by perpetualsummer Your server? Claim it

answering

Coolours is answering right now. Last checked 1 min ago. It exposes 3 tools.

Turn AI-designed colour palettes into Coolours links, with colour names, CSS and contrast checks

Uptime history 18 days of history · worst day 99%

18 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

596 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Coolours every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add coolours --transport http https://coolours.perpetualsummer.ltd/mcp

Settings → Connectors → Add custom connector, then paste this address

https://coolours.perpetualsummer.ltd/mcp

~/.codex/config.toml

[mcp_servers.coolours]
url = "https://coolours.perpetualsummer.ltd/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "coolours": {
      "url": "https://coolours.perpetualsummer.ltd/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "coolours": {
      "type": "http",
      "url": "https://coolours.perpetualsummer.ltd/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

export

export_palette

Export a palette as CSS custom properties or a JavaScript object, with each colour named after its nearest named colour. Output matches Coolours' own Export feature. create_palette_link already returns the CSS; use this for the JS object, or for a palette you didn't create. Use the output as given: its names match the Coolours UI.

palette

create_palette_link

Turn a colour palette you have chosen into a link that opens it in Coolours (coolours.perpetualsummer.ltd), where the user can preview the swatches, tweak them and export them. Use this whenever you propose a colour scheme, so the user can see it rather than read hex codes. Also returns WCAG contrast ratios for every pair of colours: check them before recommending a text/background pairing (4.5 or more for body text, 3 or more for large text and UI components). Returns each colour's Coolours name: use those names when presenting the palette. Also returns the palette as CSS custom properties: whenever you show CSS, use it exactly as given rather than writing your own. Give the user the URL.

parse

parse_palette_link

Read the colours and name back out of a Coolours link (coolours.perpetualsummer.ltd/create/...). Use this when the user pastes a Coolours URL, for example after editing a palette on the site, so you can apply their changes.

Endpoints

URL	Transport	State	Latency	Checked
https://coolours.perpetualsummer.ltd/mcp	streamable-http	answering	610 ms	1 min ago

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Coolours — questions

Answers built from our own checks of this server.

What can Coolours do?

It exposes 3 tools, read directly from the server on our last check. Among them: create_palette_link, export_palette, parse_palette_link. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Coolours working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 596 ms. The bar chart above shows every period we have measured.

How do I connect Coolours?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Coolours need an API key?

No. Coolours completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Coolours?

It answers our handshake in 596 ms on average, which is faster than 21% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.