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