Sandbox Timer
Flags idle agent sandboxes (E2B, Vercel, Daytona, Modal), shows idle cost, returns kill calls.
Connect it
Settings → Connectors → Add custom connector
URL: https://timer.cloudforbots.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://timer.cloudforbots.com/mcp{
"mcpServers": {
"timer": {
"url": "https://timer.cloudforbots.com/mcp"
}
}
}claude mcp add --transport http timer https://timer.cloudforbots.com/mcp{
"servers": {
"timer": {
"type": "http",
"url": "https://timer.cloudforbots.com/mcp"
}
}
}5 tools, verified live
track_sessionsSend your agent's running sandbox sessions (up to 200; call it on a heartbeat, e.g. every 5 minutes) and get back which are idle past your threshold or over their max lifetime, the dollars idle time has cost at the hourly rates you pass, and what to do. Pro acts: returns a ready-to-run kill call per idle sandbox for its provider (E2B kill, Vercel Sandbox stop, Daytona stop, Modal terminate) and PO
idle_reportWhich sandboxes were flagged idle and what idle time cost, per provider, from what track_sessions has seen. Without an API key pass fleet. With a key: every fleet on it. Free shows 7 days, Pro 30.
set_idle_rulesPro: save the rules track_sessions applies to a fleet: idle_minutes threshold, max_lifetime_minutes, default rates_per_hour by provider, and alert_webhook. Free returns a preview of the rules and saves nothing (pass the same values on each track_sessions call instead).
weekly_reportPlain-English summary of the last 7 days: sandboxes watched, how many sat idle, dollars idle time cost at your rates, kill calls returned (Pro) or that would have been (free). Read-only; sends nothing. Needs a free API key.
usage_and_upgradeShow today's usage for your key or IP and the $9/month upgrade link. Free tier: 500 calls/day. Not metered.
Change history
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