Agent Callback Mailbox
Rank #75,094us.inversolabs/agent-callback-mailbox
Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.
Agent Callback Mailbox is a Model Context Protocol (MCP) server. It ranks #75,094 of 137,138 servers tracked on MCP Toplist. Agent Callback Mailbox is listed on Official MCP, with 1 tracked version. It was first listed on Aug 26, 2026 and most recently updated on Aug 26, 2026.
Ranks ahead of 62,044 of 137,138 servers on MCP Toplist.
Use Agent Callback Mailbox
No credentials or required configuration declared — add it to your MCP client and go.
claude mcp add --transport http agent-callback-mailbox https://callbacks.inversolabs.us/mcp[mcp_servers.agent-callback-mailbox]
url = "https://callbacks.inversolabs.us/mcp"Add to ~/.codex/config.toml.
https://callbacks.inversolabs.us/mcpSettings → Connectors → “Add custom connector”, then paste this URL.
{
"mcpServers": {
"agent-callback-mailbox": {
"url": "https://callbacks.inversolabs.us/mcp"
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"agent-callback-mailbox": {
"type": "http",
"url": "https://callbacks.inversolabs.us/mcp"
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"agent-callback-mailbox": {
"serverUrl": "https://callbacks.inversolabs.us/mcp"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"agent-callback-mailbox": {
"url": "https://callbacks.inversolabs.us/mcp"
}
}
}Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/us.inversolabs%2Fagent-callback-mailbox)<a href="https://mcptoplist.com/server/us.inversolabs%2Fagent-callback-mailbox"><img src="https://mcptoplist.com/badge/us.inversolabs%2Fagent-callback-mailbox.svg" alt="MCP Toplist: #75,094 of 137,138" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Listed on 1 registry
Available versions (1)
| Version | Published |
|---|---|
| 0.1.54 | Aug 26, 2026 |
Frequently asked questions
- Is Agent Callback Mailbox listed on the Official MCP Registry?
- Yes — Agent Callback Mailbox is listed on the Official MCP Registry.
- How many versions does Agent Callback Mailbox have?
- MCP Toplist tracks 1 version of Agent Callback Mailbox, most recently published on Aug 26, 2026.
Do you run this server?
Community projects list the MCP servers behind real agents and apps. Publish yours and this page will link to it.