Mosaic uses signed URLs so you can upload directly to cloud storage without routing bytes through our API servers.

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POST /video/get-upload-url

Returns a pre-signed URL.
FieldTypeRequiredDescription
filenamestring✅Original file name
file_sizeinteger✅Size in bytes
content_typestring✅MIME type, e.g. video/mp4
project_idstringSession-auth only – override auto-created project

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Sample Request

curl -X POST "https://api.usemosaic.ai/api/video/get-upload-url" \
  -H "Authorization: Bearer mk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"filename":"video.mp4","file_size":1048576,"content_type":"video/mp4"}'

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Sample Response

{
  "upload_url": "https://signed-gcs-url",
  "video_id": "video_uuid",
  "temp_path": "temp/path"
}

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PUT

Upload the bytes to the signed URL. Make sure to set the same Content-Type you passed in the previous call.

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POST /video/finalize-upload/

Converts the temporary object into a permanent asset and returns a file_uuid to use with agents.
FieldTypeRequiredDescription
skip_project_creationbooleanSession-auth only

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Sample Response

{
  "file_uuid": "file_uuid",
  "file_name": "video.mp4",
  "url": "https://storage-url/video.mp4"
}
Retry-safe: The finalize-upload endpoint is idempotent – calling it twice with the same video_id returns the same file_uuid.