{"name":"add-watermark","description":"Stamp a text or image watermark onto a PDF, image, or video file. Send a file_url plus either text or image_url, with optional position, opacity, font, rotation, and margin controls, and it runs the CloudConvert watermark task and returns an output_url in the same format as the input. Covers PDFs, common raster formats like PNG/JPG/GIF/WEBP, and video formats like MP4/MOV/WEBM. Use it as a watermarking API, PDF stamping tool, or video/image branding overlay endpoint.","price":"$0.02","method":"POST","input_schema":{"properties":{"file_url":{"type":"string","description":"URL of the PDF, image, or video to watermark. Format inferred from extension."},"text":{"type":"string","description":"Watermark text. Use this or image_url, not both."},"image_url":{"type":"string","description":"URL of an image to use as the watermark. Use this or text, not both."},"font_size":{"type":"number","description":"Optional. Watermark text font size, 6-400."},"font_color":{"type":"string","description":"Optional. Text color as 6-digit hex, e.g. '#FF0000'."},"opacity":{"type":"number","description":"Optional. Watermark opacity, 0-100."},"rotation":{"type":"number","description":"Optional. Watermark rotation in degrees, -360 to 360."},"position_vertical":{"type":"string","enum":["top","center","bottom"],"description":"Optional. Vertical placement: 'top', 'center', or 'bottom'."},"position_horizontal":{"type":"string","enum":["left","center","right"],"description":"Optional. Horizontal placement: 'left', 'center', or 'right'."}},"required":["file_url"]},"input_example":{"file_url":"https://raw.githubusercontent.com/py-pdf/sample-files/main/001-trivial/minimal-document.pdf","text":"DRAFT","opacity":40},"output_example":{"output_url":"https://...pdf","watermark_type":"text","input_format":"pdf"},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}