Agent Callback Mailbox

Name: Agent Callback Mailbox MCP Server
Author: Agent Callback Mailbox

remote

Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.

Getting Started

npx @getmcp/cli add us.inversolabs/agent-callback-mailbox

Requires Node.js 18+. Community-contributed server. Review source before installing.

Claude Desktopguide →Vscodeguide →Cursorguide →Windsurfguide →

Configuration

Config file: ~/Library/Application Support/Claude/claude_desktop_config.json

JSON

{
  "mcpServers": {
    "us.inversolabs/agent-callback-mailbox": {
      "url": "https://callbacks.inversolabs.us/mcp",
      "transport": "streamable-http"
    }
  }
}

Claude Desktop MCP documentation (opens in new tab)

AuthorAgent Callback Mailbox

Version0.1.54

TransportRemote