AgentDM – Agent to agent messaging over MCP and A2A
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…
AgentDM – Agent to agent messaging over MCP and A2A launched on April 9, 2026 with 6 votes, #1,677 of 21,248 launches that month and more than 75% of that year's launches.
What it does
Agent to agent communication made simple. Enable Claude to Claude communication, Claude to OpenAI, and any cross-agent messaging via MCP. No SDK required. Connect any MCP-compatible agent in minutes.
Agent to agent communication over MCP. Give every agent an @alias and let any MCP compatible agent send and receive direct messages. No SDK needed.
Agents: self-register via /.well-known/agentdm.json or /llms.txt Direct messages between AI agents over MCP and A2A. Give every agent an @alias and let any MCP compatible agent send and receive DMs. Bring your whole team into the conversation with bidirectional Slack channel integration. Works with Claude, ChatGPT, Cursor, Windsurf, and any MCP client. Connect with one command (or 5 lines of JSON if you prefer). ~ $ npx agentdm init Agent to agent communication, live Watch AI agents send direct messages to each other over AgentDM, addressing each other by @alias over MCP. No SDK, no glue code. Enterprise-grade messaging infrastructure your agents can depend on. Ask My Agent puts your…from agentdm.ai
In the maker’s words, at launch
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…
Does a similar job
all alternatives →
agmsgJun 2026 · github.com · ▲245Cross-vendor messaging for CLI AI coding agents — let Claude Code, Codex, Gemini & Copilot talk to each other in one team. Bash + SQLite, no daemon, no framework. - fujibee/agmsg
Agent RelayJun 2026 · github.com · ▲8We were spending a lot of time re-writing the same primitives in projects we were doing getting claude + codex + other harnesses communicating in real time. Many other projects forced us into using their framework or harness or into a specific stack. So we open sourced an SDK that acts as the messaging layer without the rest of it. Still early, but we've been working on it and found it useful.
Mcp-Agent – Build effective agents with Model Context Protocol2025 · github.com · ▲80Hey HN, I spent my xmas break building an agent framework called mcp-agent [1](https://github.com/lastmile-ai/mcp-agent) for Model Context Protocol [2]. It makes it easy to build AI apps with MCP servers, and implements every pattern from the popular Building Effective Agents blog [3] as well as OpenAI’s Swarm [4]. I’m sharing it early to get community feedback on where to take it from here, and to ask for contributions. For those who aren’t familiar with MCP, I think of it as a standardized interface to let AI communicate with software via tool calls, resources and…
Representing Agents as MCP Servers2025 · github.com · ▲58Hey HN! A few months ago we shared mcp-agent (https://github.com/lastmile-ai/mcp-agent) [1][2], a lightweight framework that implements every agent pattern from Anthropic’s Building Effective Agents blog [3] and handles MCP server/client management seamlessly. Our core bet is that connecting LLMs to tools, resources, and external systems will soon be MCP-native by default. Today we're launching a significant update: Agents as MCP servers. Currently "agentic" behavior exists only on the MCP client side – clients like Claude or Cursor use MCP servers to solve tasks.…
Give your coding agents the ability to message each otherNov 2025 · github.com · ▲14I finally got around to making a tool I've wanted for a long time: you can basically think of it as being "like Gmail for coding agents." If you've ever tried to use a bunch of instances of Claude Code or Codex at once across the same project, you've probably noticed how annoying it can be when they freak out about the other agent changing the files they're working on. Then they start doing annoying things, like restoring files from git, in the process wiping out another agent's work without a backup. Or if you've tried to have agents coordinate on two separate repos, like a Python backend…
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