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Upstash Box free hosting

Upstash Box

Giving an agent a durable place to execute code.

Facts

Free allowance
5 active CPU core-hours/month
Plan limits
10 concurrent boxes · durable disk
Storage
Small box: up to 5 GB durable disk
Account
Upstash account required
Retention
Freezes after 1 hour idle; disk survives freeze; long-inactivity retention not verified
Custom domain
Not verified in reviewed documentation
Password protection
Not verified in reviewed documentation
Billing
Not verified in reviewed documentation
Execution
Small box: 2 vCPU, 4 GB RAM; freezes after 1 hour idle

Worth knowing

CPU core-hours measure active CPU consumption, not elapsed sessions. Free boxes freeze when idle; paid keep-alive is separate. Model APIs and free-disk retention need independent checks.

Reviewed 2026-10-12 from official documentation. Deployments have not been tested.

Sources

Box Free pricing ↗Durability and execution ↗
Visit Upstash Box ↗

How we match

Choose the kind of thing you made and the features you need. The results respond to the capabilities recorded in our directory.

Each result explains its fit or mismatch. Unverified commercial-use permission is marked for a terms check. Unknown free features don’t count as confirmed fits.

Apps can run in the browser, as serverless functions, or on a persistent server. The second step changes with your choice: web pages or file links for sites and files, runtime options for apps. For agents and tools, choose an agent service, MCP server, or code sandbox. A sandbox or serverless endpoint is not a continuously running process. In each group, select several to see hosts that support any selected option. Leave them blank to explore broadly; your agent can check the runtime before publishing. Docs & media candidates also need an exact file-format and size check. Commercial mode removes records with documented personal or non-production restrictions; it does not certify permission on other hosts.

Open a host to read its limits and sources. The agent brief packages your choices and those limits into instructions you can paste into your agent. It does not publish anything.

Each record has its own review date (October 11–12, 2026); deployments, privacy, support, and uptime have not been tested. There are no paid placements or affiliate links in this edition.

Independent by PLUSDEV ↗

Your publishing brief

The thing you made, chosen host, and the checks to do before publishing. No files or credentials are included.