Handler
Handler is an open-source A2A protocol client for software engineers building, testing, and operating agentic systems. It provides an interactive TUI, a scriptable CLI with structured output, and an MCP server that lets other agents integrate with A2A services directly. Handler also supports global and repo-scoped A2A server configuration with bearer, API key, mTLS, and OAuth2 client credentials auth.
Install
Install Handler from the PyPI package as a uv tool:
uv tool install a2a-handler
Or with pipx:
pipx install a2a-handler
Or with pip:
pip install a2a-handler
Quick Start
Open the interactive terminal UI:
handler tui
Inspect an A2A server's agent card:
handler card get --url http://localhost:8000
Send a message from the CLI:
handler message send --url URL --text "hello"
Open the full documentation:
handler docs
Run Without Installing
Run Handler with uvx:
uvx --from a2a-handler handler
Run Handler with pipx:
pipx run a2a-handler
Documentation
Read the documentation at https://handler.alduncanson.com.
1 maintainer
Release files for a2a-handler 0.2.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| a2a_handler-0.2.0.tar.gz | 94.3 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| a2a_handler-0.2.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 210.3 kB
Release files / a2a_handler-0.2.0.tar.gz
| Download URL | a2a_handler-0.2.0.tar.gz |
|---|---|
| Size | 94.3 kB |
| Tags | Source |
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Release files / a2a_handler-0.2.0-py3-none-any.whl
| Download URL | a2a_handler-0.2.0-py3-none-any.whl |
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| Size | 116.0 kB |
| Tags | Python 3 |
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