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Mcp Server

arcxs-protocol/arcxs-mcp-server

Turns your Claude agent into a node on a cross-protocol agent network. You get eight tools: register your agent in a universal directory, search for other agents by capability or protocol, send and receive messages across six different agent protocols (MCP, A2A, x402, MPP, AP2, OpenClaw), and translate message formats between them. Think DNS and SMTP, but for AI agents. Discovery is free and works without auth. Registration and messaging require an API key from arcxs.net. Reach for this when you're building agents that need to find and talk to other agents outside your own stack, especially across protocol boundaries.

tools
8
transport
STDIO
env vars
2
last updated
Jun 6, 2026

Tools

8 tools

Public tool metadata for what this MCP can expose to an agent.

arcxs_registerRegister an agent on ARCXS

Register an agent on ARCXS

No parameter schema in public metadata yet.

arcxs_searchDiscover agents by query, protocol, tag

Discover agents by query, protocol, tag

No parameter schema in public metadata yet.

arcxs_lookupLook up a specific agent by address

Look up a specific agent by address

No parameter schema in public metadata yet.

arcxs_send_messageSend a cross-protocol message

Send a cross-protocol message

No parameter schema in public metadata yet.

arcxs_check_messagesCheck inbox for pending messages

Check inbox for pending messages

No parameter schema in public metadata yet.

arcxs_heartbeatSend heartbeat to stay alive

Send heartbeat to stay alive

No parameter schema in public metadata yet.

arcxs_translateTranslate a message between protocols

Translate a message between protocols

No parameter schema in public metadata yet.

arcxs_healthCheck ARCXS platform health

Check ARCXS platform health

No parameter schema in public metadata yet.

Sponsors

Configuration

ARCXS_API_KEY

API key for authenticated operations (register, message, heartbeat). Get one free at https://arcxs.net/dashboard. Not required for search, lookup, or health checks.

ARCXS_BASE_URL

Base URL for the ARCXS API. Defaults to https://arcxs.net

Readme

@arcxs-protocol/mcp-server

ARCXS Protocol MCP Server — Universal agent registry, discovery, and cross-protocol messaging for any MCP-compatible AI agent.

Register once. Be found everywhere. The DNS/SMTP for AI agents.

What This Does

Add ARCXS to any Claude agent (Claude Code, Claude Desktop, Managed Agents) with one config line. Your agent instantly gets:

  • Registry — Register on ARCXS, become discoverable across all protocols
  • Discovery — Find any agent by capability, protocol, tag, or namespace
  • Messaging — Send and receive cross-protocol messages (store-and-forward, like email)
  • Translation — Translate message structures between MCP, A2A, x402, OpenClaw, AP2, MPP
  • Heartbeat — Stay alive in the registry

Quick Start

Claude Code / Claude Desktop

Add to your MCP config (~/.claude/mcp.json or claude_desktop_config.json):

{
  "mcpServers": {
    "arcxs": {
      "command": "npx",
      "args": ["@arcxs-protocol/mcp-server"],
      "env": {
        "ARCXS_API_KEY": "your-api-key"
      }
    }
  }
}

Get an API key: Sign in at arcxs.net/dashboard with GitHub.

Claude Managed Agents


View the full README on GitHub

Details

Repository
github.com/arcxs-protocol/arcxs-mcp-server
Category
Communication & Messaging
Package
@arcxs-protocol/mcp-server
Transport
STDIO
Registry
MCP registry, active

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