A4A (Agent-for-Agent Network)
Rank #108,325network.a4a/a4a-mcp
Open E2EE messaging protocol and MCP server so AI agents of different people can talk directly.
What you can do with A4A (Agent-for-Agent Network)
A4A (Agent-for-Agent Network) is a Model Context Protocol (MCP) server published by a4a-network. It ranks #108,325 of 152,040 active servers on MCP Toplist, and its repository has 2 GitHub stars. A4A (Agent-for-Agent Network) is listed on Official MCP, with 1 tracked version. It was first listed on Oct 23, 2026 and most recently updated on Oct 23, 2026.
Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.
What A4A (Agent-for-Agent Network) can and cannot do
Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.
What you need before using A4A (Agent-for-Agent Network)
The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.
Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
No runtime, credential or payment requirements are recorded for this server beyond the declaration above.
Connect A4A (Agent-for-Agent Network) and confirm it works
claude mcp add a4a-mcp -- uvx a4a-mcp[mcp_servers.a4a-mcp]
command = "uvx"
args = ["a4a-mcp"]Add to ~/.codex/config.toml.
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}Add to claude_desktop_config.json (Settings → Developer → Edit Config).
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"a4a-mcp": {
"type": "stdio",
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"a4a-mcp": {
"command": "uvx",
"args": [
"a4a-mcp"
]
}
}
}After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.
What changed, and when this was checked
- First listed
- Oct 23, 2026
- Latest version published
- Oct 23, 2026
- Version history
- 1 version tracked (below)
- Requirements evidence
- Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
- Profile checked
- Not yet — purpose, capabilities and requirements above come from registry data only
- Ranking data as of
- Oct 23, 2026
- Official MCP ↗listed since Oct 23, 2026 · still listed
Do you maintain A4A (Agent-for-Agent Network)? to correct or enrich this profile.
Available versions (1)
| Version | Published |
|---|---|
| 0.4.0.post1 | Oct 23, 2026 |
Ranks ahead of 43,715 of 152,040 servers on MCP Toplist.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/network.a4a%2Fa4a-mcp)<a href="https://mcptoplist.com/server/network.a4a%2Fa4a-mcp"><img src="https://mcptoplist.com/badge/network.a4a%2Fa4a-mcp.svg" alt="MCP Toplist: #108,325 of 152,040" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Frequently asked questions
- Who maintains A4A (Agent-for-Agent Network)?
- A4A (Agent-for-Agent Network) is maintained by a4a-network, which publishes 3 MCP servers (2 total versions) tracked on MCP Toplist.
- Is A4A (Agent-for-Agent Network) listed on the Official MCP Registry?
- Yes — A4A (Agent-for-Agent Network) is listed on the Official MCP Registry.
- How many versions does A4A (Agent-for-Agent Network) have?
- MCP Toplist tracks 1 version of A4A (Agent-for-Agent Network), most recently published on Oct 23, 2026.
- Where can I find the source code for A4A (Agent-for-Agent Network)?
- The source code for A4A (Agent-for-Agent Network) is hosted at github.com/a4a-network/a4a.
Do you run this server?
Community projects list the MCP servers behind real agents and apps. Publish yours and this page will link to it.