The official command-line interface for A2A (Agent-to-Agent) compatible agents.
Publisher’s description
What is a2a?
a2a is an open-source terminals & cli tool program for Windows from a2aproject. It is written in Go.
Installation and requirements
Official installers exist for 64-bit and ARM64 as Portable. It runs without installation (portable).
Updates and version history
The current version is 0.3.1, released on October 16, 2026. 5 versions are listed since June 26, 2026, each with links to its own installer files. The last update is less than a month old.
Popularity and file types
The source code on GitHub (a2aproject/a2a-cli) has 160 stars. Similar programs include PowerShell, QPDF and Oh My Posh.
Project description on GitHub: “The official command-line interface for interacting with A2A (Agent2Agent) compatible agents.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Portable: runs without installation
- Updated in the last two months
In short: a2a is an open-source terminals & cli tool tool for 64-bit and ARM64 PCs.
Is a2a safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
526C027AC98B60B2B71ED2BED24E28326FF37D5B849D63973B2D0AAE0D6A07BF· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 5 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.3.1Latest | October 16, 2026 | — | 64-bit ZIPARM64 ZIP |
| 0.3.0 | September 24, 2026 | — | ARM64 ZIP64-bit ZIP |
| 0.2.0 | September 9, 2026 | — | ARM64 ZIP64-bit ZIP |
| 0.1.10 | August 26, 2026 | — | 64-bit ZIP |
| 0.1.6 | June 26, 2026 | — | 64-bit ZIP |
Install from the command line
Silent install ›winget install --id a2aproject.a2acli -eRelated guide: How to use winget: install and update apps
Information
- Publisher
- a2aproject
- Category
- Terminals & CLI tools
- Licence
- Apache-2.0
- Price
- Free
- Source code
- github.com/a2aproject/a2a-cli
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- Portable
- Version
- 0.3.1
- Released
- October 16, 2026
- Added to the catalogue
- July 14, 2026
- Versions listed
- 5
- GitHub stars
- 160
- GitHub forks
- 22
- Website
- github.com
- winget ID
- a2aproject.a2acli
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is a2a free?
Yes. a2a is open-source software under the Apache-2.0 licence.
Is a2a safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install a2a with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does a2a run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of a2a?
The versions page lists all 5 versions with links to their official installer files, back to June 26, 2026.
Can I use a2a without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to a2a?
PowerShell, QPDF, Oh My Posh, fzf and yq. The alternatives page compares them.
