# Component Library Actions on resource Library Component. ## Generate Thumbnail Upload URL - [POST /v4/thumbnails/upload-url](https://developer.zuora.com/zephr-api-reference/zephr-admin-api/component-library/generatethumbnailuploadurl.md): Generates a pre-signed URL for securely uploading a thumbnail image. The link expires after 10 minutes. Considerations: - Uploaded images are not optimized by the server; please upload images pre-optimized for web use. - Each uploaded file receives a unique thumbnailId for reference within your application, but the file name in the bucket is derived from this ID, ensuring no conflicts with existing files.