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JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

claude mcp add --transport http agent-callback-mailbox https://callbacks.inversolabs.us/mcp

[mcp_servers.agent-callback-mailbox]
url = "https://callbacks.inversolabs.us/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "agent-callback-mailbox": {
      "type": "remote",
      "url": "https://callbacks.inversolabs.us/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "agent-callback-mailbox": {
      "type": "http",
      "url": "https://callbacks.inversolabs.us/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=agent-callback-mailbox&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vY2FsbGJhY2tzLmludmVyc29sYWJzLnVzL21jcCJ9"
}

{
  "servers": {
    "agent-callback-mailbox": {
      "type": "http",
      "url": "https://callbacks.inversolabs.us/mcp"
    }
  }
}

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

extensions:
  "agent-callback-mailbox":
    enabled: true
    name: "agent-callback-mailbox"
    type: streamable_http
    uri: "https://callbacks.inversolabs.us/mcp"
    timeout: 300

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

Tool list unknown · checked 2026-10-19 10:20 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 47 / 100

no-repositoryunreachable

provenance45

liveness0

freshness85

hygiene80

+dns-namespace -unreachable(13 failures) ~updated-54d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://callbacks.inversolabs.us/mcp` streamable-http	unknown	no (13 failures)	0%	–	–	–

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

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More from us.inversolabs

Official server.json

{
  "name": "us.inversolabs/agent-callback-mailbox",
  "title": "Agent Callback Mailbox",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://callbacks.inversolabs.us/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.54",
  "description": "Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results."
}