A2ACast enables zero-infrastructure messaging between AI agent sessions running on different machines. It uses ntfy.sh wake pings combined with a shared repository as the payload channel. The library supports agents built with tools like Claude, ChatGPT, and Copilot under an MIT license.
a2acast is an Other AI product. It focuses on enabling communication between AI agent sessions running on separate machines without setting up dedicated infrastructure. It is built as an open-source project for developers. a2acast is open source under the MIT license. a2acast is available on the command line.
a2acast first shipped in 2026. Key capabilities include multi-agent messaging, zero-infrastructure, and ntfy integration.
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