Random colour

$0.001 per call with a key ($0.01 paid per call from a wallet) · failed calls are never charged · no account needed: a card key or USDC

One or more random colours in hex, RGB and HSL, optionally limited to pastel or dark tones. Use for placeholders, avatars and design ideas.

Run it free (3 free calls) Buy credits by card (from $1) Example result (JSON)

$0.001 per call with prepaid credits: $1 by card pays for 1,000 calls, with no account and no subscription.

Try it with your own inputs

How many (1-50, default 1)

Uses one of your 3 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
countintegerHow many (1-50, default 1)
tonestringany (default), pastel or dark

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://glyphcall.com/random/color?count=3"

Or one of your 3 free calls, no key:

curl "https://glyphcall.com/random/color?count=3&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "colors": [
    {
      "hex": "#a7c7e7",
      "rgb": "rgb(167, 199, 231)",
      "hsl": "hsl(210, 60%, 78%)"
    }
  ]
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is random_color, and the first 25 successful calls are free:

https://glyphcall.com/mcp

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