{"name":"QR API","usage":"GET /qr?text=Hello%20world","example":"https://qr-api.curtisfurniture.co.uk/qr?text=Hello%20world","parameters":{"text":"required, QR payload (URL-encoded)","format":"png (default) or svg","size":"output width/height in pixels (50-2000, default 150)","margin":"quiet zone in modules (0-16, default 4)","ecLevel":"error correction: L, M, Q, or H (default M)","dark":"module hex color (default 000000)","light":"background hex color (default ffffff; 0000 = transparent)"},"auth":"If API_KEY is set, pass ?key=, X-API-Key, or Authorization: Bearer"}