{"openapi":"3.1.0","info":{"title":"Landing en 24h API","version":"1.0.0","description":"Generate a single-file HTML landing page for a small business. Paid per call with x402 (USDC on Base or Polygon). Docs: https://landingen24h.com/api/","contact":{"email":"hola@landingen24h.com"}},"servers":[{"url":"https://landingen24h.com"}],"paths":{"/api/x402/landing":{"post":{"operationId":"generateLanding","summary":"Generate a landing page (0.25 USDC)","description":"Generate a complete, responsive single-file HTML landing page for a small business: hero, services, WhatsApp/email call to action, contact section and footer, with inline CSS and SEO meta tags. Send business_name (required) plus optional tagline, description, services, city, whatsapp, email, language (es|en), color and cta_text. Returns JSON {html, filename}. Deterministic template, nothing is stored.","x-payment-info":{"protocols":["x402"],"price":{"mode":"fixed","currency":"USD","amount":"0.25"},"networks":["eip155:8453","eip155:137"],"asset":"USDC","payTo":"0xb6d00A148AD63Fd9CCDd484B687c6012bA1561E1"},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"business_name":{"type":"string","maxLength":80,"description":"Business or project name (required)"},"tagline":{"type":"string","maxLength":140,"description":"Short headline, e.g. 'Plumbing repairs in 24 hours'"},"description":{"type":"string","maxLength":600,"description":"One or two sentences about the business"},"services":{"type":"array","maxItems":8,"items":{"type":"string","maxLength":200},"description":"Up to 8 services. Use 'Title: short description' to add a description. GET: comma-separated"},"city":{"type":"string","maxLength":80,"description":"City or area served"},"whatsapp":{"type":"string","maxLength":24,"description":"WhatsApp number in international format, digits only, e.g. 5491122334455"},"email":{"type":"string","maxLength":120,"description":"Contact email"},"language":{"type":"string","enum":["es","en"],"default":"es","description":"Page language"},"color":{"type":"string","pattern":"^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$","description":"Brand color as hex, e.g. #0f766e"},"cta_text":{"type":"string","maxLength":40,"description":"Main button text"}},"required":["business_name"],"additionalProperties":false},"example":{"business_name":"Plomeria Rapida","tagline":"Plumbing repairs in Buenos Aires, same day","description":"Leaks, water heaters and bathroom installations for homes and small shops.","services":["Leak repair: detection and fix without breaking walls","Water heaters: installation and maintenance","Bathrooms and kitchens: new installations"],"city":"Buenos Aires","whatsapp":"5491122334455","email":"hola@example.com","language":"en","color":"#0f766e","cta_text":"Message us on WhatsApp"}}}},"responses":{"200":{"description":"Generated landing page","content":{"application/json":{"schema":{"type":"object","properties":{"html":{"type":"string","description":"Complete single-file HTML document (UTF-8, inline CSS)"},"filename":{"type":"string","description":"Suggested file name, e.g. my-business.html"}},"required":["html","filename"]}}}},"400":{"description":"Invalid input (no charge)"},"402":{"description":"Payment required (x402 challenge)"}}}}}}