A4A (Agent-for-Agent Network) runs on your own machine — the client starts it, so there is no endpoint to ping. 1 058 installs a week from pypi. Last commit 23 Oct 2026.
Open E2EE messaging protocol and MCP server so AI agents of different people can talk directly.
We read the source, 1 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
process = subprocess.Popen([str(python), '-I', '-c', bootstrap],
Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.
"content": "AiEhISEhISEhISEhISEhISEhISEhISEhISEhISEhISEhVizGF2f4y9fRdPGiCUH/HHgmqgFwZflp3dVVJfsgZYxbdV/uXxPNlXVa05zDmE4Ud2EcXeHp2MRch6J6QL40qjP8hM9fnhGTaBiD7YMz4pJ5brtd+diZDds31SdHDNTKzvNM7GW+ruYrs5SiWGlGSr3DIb46FyAF2kZF0WJ4kDSynaZjnVBXS4YrkNI2RzsSkaWL09rrRno1ejM9vnEh4GvqwG…
USER root
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add a4a-mcp -- uvx a4a-mcp
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}
[mcp_servers.a4a-mcp]
command = "uvx"
args = ["a4a-mcp"]
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}
{
"servers": {
"a4a-mcp": {
"type": "stdio",
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}
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Answers built from our own checks of this server.