Agent Callback Mailbox for Windsurf

us.inversolabs/agent-callback-mailbox

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

client:Windsurf transport:streamable-http

Install Agent Callback Mailbox in Windsurf

~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json

{
  "mcpServers": {
    "agent-callback-mailbox": {
      "serverUrl": "https://callbacks.inversolabs.us/mcp"
    }
  }
}

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs