{"machine":"contrast-ratio","slot":"S89","title":"WCAG contrast checker","how_to_call":"POST https://innernetcorp.com/machines/contrast-ratio with Content-Type: application/json","price_usd":"$0.003","currencies":["USDC","EURC"],"payment":"x402: send the POST without payment to receive a 402 with signed requirements; pay any option and retry.","input_example":{"foreground":"#0F1216","background":"#FFB000"},"input_schema":{"type":"object"},"summary":"Compute the WCAG contrast ratio between two colors and whether they pass AA / AAA accessibility for normal and large text.","catalog":"/catalog"}