Sandbox0 Cloud is a managed sandbox runtime for AI agents that need reusable execution environments. Agents can run code, install dependencies, manage files, and control network access through a REST API, the s0 CLI, and open-source Go, JavaScript/TypeScript, and Python SDKs. The current runtime is closed source; the historical open-source release is archived, self-hosting is no longer supported, and Bring Your Own Cloud is planned rather than available. After a successful filesystem checkpoint, the writable root filesystem retains installed tools, configuration, repositories, and user files across runtime generations. Default pause/resume restores committed files and starts fresh processes; it does not preserve live memory, sockets, or REPL sessions. Runtime-only mounts such as /tmp are excluded from filesystem persistence. Experimental memory checkpoints have separate requirements. Cloud compute costs $0.015 per GiB-hour, billed by the second using the configured memory limit. Retained incremental storage costs $0.02 per GiB-month. Pausing stops compute charges while retained data remains billable; leaving a sandbox running but idle still incurs compute charges. New users receive a one-time $5 credit without a credit card. The production API base is https://api.sandbox0.ai. SDK and HTTP automation use scoped API keys, while the CLI supports interactive device login. Verification covered the official documentation and pricing, CLI releases, SDK repositories, a public OpenAPI 3.0.3 schema, and authentication rejection for an unauthenticated sandbox-list request. Sandbox execution, checkpoint durability, and billing were not tested with an authenticated account.
Best for agent capabilities
Useful in agent tasks
Overview
When to use Sandbox0 Cloud
Sandbox0 Cloud is listed for Sandbox, Code Execution workflows. Sandbox0 Cloud is a managed sandbox runtime for AI agents that need reusable execution environments. Agents can run code, install dependencies, manage files, and control network access through a REST API, the s0 CLI, and open-source Go, JavaScript/TypeScript, and Python SDKs. The current runtime is closed source; the historical open-source release is archived, self-hosting is no longer supported, and Bring Your Own Cloud is planned rather than available. After a successful filesystem checkpoint, the writable root filesystem retains installed tools, configuration, repositories, and user files across runtime generations. Default pause/resume restores committed files and starts fresh processes; it does not preserve live memory, sockets, or REPL sessions. Runtime-only mounts such as /tmp are excluded from filesystem persistence. Experimental memory checkpoints have separate requirements. Cloud compute costs $0.015 per GiB-hour, billed by the second using the configured memory limit. Retained incremental storage costs $0.02 per GiB-month. Pausing stops compute charges while retained data remains billable; leaving a sandbox running but idle still incurs compute charges. New users receive a one-time $5 credit without a credit card. The production API base is https://api.sandbox0.ai. SDK and HTTP automation use scoped API keys, while the CLI supports interactive device login. Verification covered the official documentation and pricing, CLI releases, SDK repositories, a public OpenAPI 3.0.3 schema, and authentication rejection for an unauthenticated sandbox-list request. Sandbox execution, checkpoint durability, and billing were not tested with an authenticated account. Consider it when an agent needs this capability through a documented service boundary instead of custom infrastructure maintained inside the application.
In 4agent's task model, the product maps to code execution. That makes it a candidate for workflows that build and deploy software.
Integration checklist
- Access: confirm the api key authentication flow, credential scope, rotation process, and whether calls can be attributed to a user or service identity.
- Client support: official or documented clients are listed for go, typescript, python.
- Automation: OpenAPI is listed as available, MCP is not currently recorded, and CLI support is listed as available. Confirm each requirement in the provider's current documentation.
- Operations: test rate limits, timeouts, retry safety, error payloads, logs, data retention, and the current paid pricing model with production-like volume.
Sources and verification
Use these primary sources to verify current behavior before making an implementation or purchasing decision. Product capabilities, limits, and prices can change after a 4agent listing is reviewed.