Color Palette Generator API

Generate harmonious color palettes from any hex color. 5 schemes: complementary, analogous, triadic, split-complementary, tetradic. Returns hex, RGB, HSL, and CSS vars. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "color-palette": {
      "url": "https://color-palette.api.klymax402.com/mcp"
    }
  }
}

Related MCP server: MCP Color Server

Quickstart -- HTTP (x402)

curl -X POST "https://color-palette.api.klymax402.com/api/palette" \
  -H "Content-Type: application/json" \
  -d '{"color":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

design_generate_color_palette

Use this when you need to generate a harmonious color palette from a base hex color. Returns multiple color formats ready for design or code.

Parameters

Example response:

{"colors":[{"hex":"#FF5733","rgb":{"r":255,"g":87,"b":51},"hsl":{"h":11,"s":100,"l":60},"cssVar":"--color-1: #FF5733;"}],"scheme":"complementary","baseColor":"#FF5733","count":5}

When to use: building design systems, generating theme colors for websites, creating brand color guidelines, or picking accessible color combinations for UI components. Use this BEFORE starting any design project that needs a cohesive palette.

Not for: image processing (use media_extract_text_from_image), favicon generation (use utility_generate_qr_code), screenshot capture (use capture_screenshot).

Example agent prompts

• "Generate a harmonious color palette from a base hex color"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key

• Network: Base L2 (eip155:8453)

• Asset: USDC

• Facilitator: Coinbase CDP (primary), PayAI (fallback)

• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt

• Full API reference: https://klymax402.com/llms-full.txt

• Live stats: https://klymax402.com/stats

License

MIT