Hex colour to RGB/HSL and WCAG contrast

caution grade B Base found on thirdweb found on PayAI confidence 0.70
https://x402-catalog-history.ai-business-surface.workers.dev/color
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Advertised description
Hex colour to RGB/HSL and WCAG contrast in one GET: pass a text colour and a background colour (3 or 6 hex digits) and get each as #rrggbb, RGB and HSL, the WCAG relative luminance, the contrast ratio and the four…Show more ▾Show less ▴Hex colour to RGB/HSL and WCAG contrast in one GET: pass a text colour and a background colour (3 or 6 hex digits) and get each as #rrggbb, RGB and HSL, the WCAG relative luminance, the contrast ratio and the four AA/AAA verdicts. curl: GET /color?hex=1a2b3c&against=ffffff (against defaults to ffffff). Response: {"foreground":{"hex":"#1a2b3c","rgb":{"r":26,"g":43,"b":60},"hsl":{"h":210,"s":39.5,"l":16.9}},"background":{"hex":"#ffffff"},"contrast_ratio":14.69,"wcag":{"aa_normal":true,"aa_large":true,"aaa_normal":true,"aaa_large":true}}. A missing or non-hex value, or an alpha hex (#rgba/#rrggbbaa), is refused with 400 before payment. Computed inside the Worker from the input; no upstream call, no account, no key. 0.001 USDC, one GET, one delivery. A purchase is two calls by design: this first call returns 402 with the price and the payment terms, and you then repeat the same request with the PAYMENT-SIGNATURE header to receive the 200 delivery.
(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
30-day uptime
100.0%
Avg latency (EU)
861 ms
slow · measured from a single EU vantage point; includes network round-trip distance to the endpoint; a geographically distant endpoint reads slower even when its server is fast, so it is only lightly weighted in the score
Confidence
0.70
full-density score
Advertised price
$0.001
USDC
Price stability
Stable
last 30 days
Probes (30d)
56
full record · up to 48/day
More details ▾
Endpoint ID270505
Pay on Base$0.001 USDC · to 0x6f60…89c3 ↗
First seen2026-10-18
Last probed2026-10-30
Statuslisted
Snapshot computed2026-10-30 10:59 UTC (free snapshot, recomputed at least every 24h)
Why this verdict?2 warnings
A wallet payment page opens first; approve the USDC payment and the full JSON report loads right in your browser. Want a taste first? Read a free full sample report.
This page is the free cached snapshot (computed under an hour ago, refreshed at least every 24h). Here's what the paid API adds.
  • ✓Live re-probe at decision time
    The score is computed the moment you ask, not up to 24h ago.
  • ✓Instant snapshot refresh
    Every paid call rewrites this page, the badge and the card immediately.
  • ✓The full “why”, machine-readable
    Confidence band, component breakdown, every risk flag with its evidence.
  • ✓On-chain settlement proof
    Real USDC volume and distinct payers behind the pay-to wallet.
  • ✓90-day raw history
    Every listing, price and payTo change, every probe result.
  • ✓Ranked better alternatives
    Higher-scored endpoints serving the same function, when they exist.
  • ✓Change & liveness alerts
    PayTo/price moves, spec regressions, downtime; 5-minute probes while watched.
$npx -y x402-trust-mcpGive your agents the tools to do all of this for you, with one install. Agents use the x402_trust_score MCP tool or POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).