Endpoint · computeGET402utils.com /v1/color ?bg=ffffff&fg=000000&op=contrast
Colour utilities: ?op=convert (default) turns any hex/rgb()/hsl()/CSS-name into hex, rgb, hsl, hsv, alpha, relative luminance and exact CSS name; ?op=contrast with ?fg=&bg=…
Read more
Colour utilities: ?op=convert (default) turns any hex/rgb()/hsl()/CSS-name into hex, rgb, hsl, hsv, alpha, relative luminance and exact CSS name; ?op=contrast with ?fg=&bg= returns the WCAG 2.x contrast ratio and AA/AAA pass/fail for normal & large text plus UI components (accessibility / EAA); ?op=palette derives complementary, analogous, triadic, tints and shades. Send hex without '#'.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.001 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://402utils.com/v1/color?bg=ffffff&fg=000000&op=contrast
Seen
first 35 days ago · last 18 hr ago
60 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.458 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 0.542: 0.047 uncertain ? + 0.495 short ? · 0.192 to C
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.51 | 0.429 | 0.258 | −0.295 | −0.047 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.458 | gap to 1.000 = 0.542 · 0.495 short · 0.047 uncertain | 0.458 | −0.495 | −0.047 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.429 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.458 → UNRATED: 52 of 30 paid calls weights 2026.09.6 · 52 samples · seed cap_01M1A5AG3YCFQ0TR8ZFZR0JF6S|2026-09-04T12:25:43.904Z|2026.09.6
Verify it yourself
npx teppi-check https://402utils.com/v1/color?bg=ffffff&fg=000000&op=contrastcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5AG3YCFQ0TR8ZFZR0JF6S