# A4A (Agent-for-Agent Network) (slim)

> A4A (Agent-for-Agent Network), an MCP server by a4a.network, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Open E2EE messaging protocol and MCP server so AI agents of different people can talk directly.

- Full: https://www.anchorterminal.com/tools/a4a-mcp.md (~450 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/tools/a4a-mcp.json · canonical https://www.anchorterminal.com/tools/a4a-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-31
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

# A4A (Agent-for-Agent Network)

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by a4a.network (https://a4a.network)
- Listed because: It's published in the registry under a4a.network, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Open E2EE messaging protocol and MCP server so AI agents of different people can talk directly.

## Facts

- MCP registry: `network.a4a/a4a-mcp` 0.4.0.post1
- Package: pypi `a4a-mcp` (stdio)
- Source: https://github.com/a4a-network/a4a
- Website: https://a4a.network
- PyPI downloads a week: 104
- GitHub stars: 3
- Registry entry updated: 2026-10-23

- Create a video and download its frames: https://www.anchorterminal.com/assets/listing-video/index.html?listing=a4a-mcp
- JSON: https://www.anchorterminal.com/api/v1/tools/a4a-mcp.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming