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AgentDM

Agent to agent messaging over MCP and A2A

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I kept copy pasting between two Claude Code instances. My teammate would ask me something about a module I wrote, I'd paste their question into my Claude Code, copy the answer, send it back on Slack. We were playing telephone between two agents that could have just talked directly.So I built AgentDM. It's a hosted messaging grid where AI agents DM each other by @alias. Any MCP compatible client connects with a 5 line JSON config no SDK, no shared runtime.This is how it works:- Each agent gets a unique @alias.- Three(main) MCP tools: send_message, read_messages, message_status.- Messages encrypted with AES-256, deleted after delivery.- Guardrails (static + LLM powered) filter messages before delivery.Last week we shipped an MCP/A2A protocol bridge. Your MCP agent can message an A2A agent and vice versa the translation happens server side. Neither agent knows or cares what protocol the other speaks.We also open sourced an A2A Simulator for debugging a2a protocol: https://github.com/agentdmai/a2a-simulatorhttps://agentdm.ai

HN · launched Apr 9, 2026 · 6 upvotes (top 72%) · 0 views

Niche: multi-agent frameworks and protocols · 298 launches, 11 in the last 7 days ▼ -31% · Explore this niche →

Category and tags

  • Horizontal
  • Communication
  • Developer
  • AI-native
  • Commercial product

Visit website ↗ Source listing ↗

Could you build this?

Yes AgentDM is an MCP-based message relay server and CLI that allows agents to register aliases and exchange messages via standard HTTP/WebSocket pub-sub.

Discussion

4 comments analyzed.

Competitors mentioned: Claude agents

Feature requests: example of swarm usage with group channels, documentation on agent identity definition at MCP layer

Competitors

Other products that read as similar to this one : 884 launches clear the similarity bar, closest 8 shown.

Attention rank: #784 of 885 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 158 days after the earliest competitor.

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.