Batch-Bildwasserzeichen

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/batch-watermark' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"imageFiles.ext","contentType":"application/octet-stream","size":12345}'
curl -X POST 'https://api.elysiatools.com/api/upload/presign/batch-watermark' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"watermarkImage.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/de/api/tools/batch-watermark' \
  -F 'imageFiles=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'watermarkType=text' \
  -F 'watermarkText=Enter watermark text' \
  -F 'watermarkImage=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'position=bottom-right' \
  -F 'opacity=70' \
  -F 'fontSize=24' \
  -F 'fontFamily=Arial, sans-serif' \
  -F 'fontColor=#ffffff' \
  -F 'backgroundColor=Background color (optional)' \
  -F 'margin=20' \
  -F 'scale=20' \
  -F 'outputFormat=original' \
  -F 'quality=85' \
  -F 'preserveMetadata=false' \
  -F 'keepOriginalNames=true'