Example inputPOST /api/v1/x402/hex-color-luminance
{
"hex": "#112233"
}Portable intent card · agent-ops-math
Hex Color Relative Luminance API for agents
Relative luminance of a #RRGGBB color. Call when contrast checks without image decode. Returns luminance as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Intent to transaction
One command, attributed.
The source header follows this discovery route through challenge, payment and delivery without exposing the buyer or request body.
npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/hex-color-luminance -m POST -H 'x-delx-source: intent-card-hex-color-luminance-api' --max-amount 0.001 -b '{"hex":"#112233"}'Agent discoverydelx/intent-card/v1
{
"intent": "Hex Color Relative Luminance for an agent workflow",
"tool_name": "util_hex_color_luminance",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/hex-color-luminance-api.json"
}Portable and inspectable