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MASV Agent Release Notes

Learn about the latest updates to the MASV Agent

MASV Agent is a cross-platform service that manages file transfers to and from MASV. It functions primarily as a CLI tool, but uses a local REST API server under the hood that can be called directly.

It supports the upload and download of multiple packages simultaneously, while abstracting file system interactions. The MASV Agent is used to transfer terabytes of data every day, reliably and quickly. It is also stateful—it stores metadata about transfers and user sessions in order to carry out its responsibilities and survive interruptions and shutdowns.

For more information about installing, updating or working with the MASV Agent and creating custom functions with the MASV API, see MASV Developer Documentation.

Note: Using Docker? If you're updating, please see instructions for Updating MASV Agent.

MASV Agent v3.2.5

Released: March 10, 2026

Bug fixes:

  • Send automations: Fixed a stability issue that occurred when automations created a large number of uploads in a short span of time.

  • Stalled uploads: Fixed an issue that caused uploads to get stuck at 100% following a restart.

Other changes:

  • Send automations: When the Send individual files option is enabled, AppleDouble files (e.g: "._filename") are now skipped automatically.

 

MASV Agent v3.2.4

Released: March 3, 2026

New features:

  • New Setting: filters   Lets users set up an Allow list and an Ignore list to control which files in a package are downloaded. The filters apply to all downloads.

MASV Agent v3.2.3

Released: Feb. 24, 2026

New features

  • Security: Added user authentication support for Portal download links.
  • Sidecar Options: Support for Per-File Manifest files.
  • Upload status/Download status: Added new CLI flag/parameter to query and view transfer status without listing all items in the transfer: --omit-items. 

Bug fixes

  • Fixed completed file issue: If any files associated with the package are not downloaded (including zero byte files or metadata files) the package is no longer marked as complete. 
  • Portal automations: Fixed issue causing Portal automations to fail when transferring growing files. 
  • Download automations no longer retry indefinitely in situations where user intervention is required.

Other changes

  • Updated the blocklist: icon\r (macOS) is now on the blocklist. 
  • Added error handling for large file count transfers. 
  • Security updates and enhancements.