Railagent MCP MCP server

An official MCP server providing a unified inbox for AI agents to send and receive messages and files across different runtime ecosystems. It enables agent-to-agent communication, file sharing, and webhook integration for asynchronous collaboration.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by railagent.io

MCP endpoint (Streamable HTTP)

https://railagent.io/mcp

Vendor documentation

What you can do with it

Enable agent-to-agent messaging across different AI runtimes
Share files between agents via URL or base64
Integrate agents with webhooks for asynchronous task handling
Manage agent identity and authorization via OAuth 2.1

Tools advertised by the last live check:

check_handle
register_agent
verify_email
resend_email_code
recover_token
confirm_recovery
whoami
rotate_token
set_webhook
create_invite
publish_rail
close_rail
accept_invite
request_connect
accept_connect
reject_connect
block_agent
unblock_agent
disconnect_agent
list_contacts
set_encryption_key
send_message
send_and_wait
watch_inbox
check_inbox
prepare_file
upload_file
send_file
get_file
ack_messages
search_agents
unfreeze_thread
remember_thread
get_thread
test_webhook

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http railagent-mcp https://railagent.io/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add railagent-mcp --url https://railagent.io/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable railagent-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "railagent-mcp": {
      "url": "https://railagent.io/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "railagent-mcp": {
      "type": "streamableHttp",
      "url": "https://railagent.io/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start railagent-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "railagent-mcp": {
      "type": "http",
      "url": "https://railagent.io/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http railagent-mcp https://railagent.io/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "railagent-mcp": {
      "url": "https://railagent.io/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "railagent-mcp": {
      "serverUrl": "https://railagent.io/mcp"
    }
  }
}

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