CodeSandbox API
CodeSandbox — cloud development environment platform with browser-based code editors and API-accessible microVM environments (Devboxes) for running arbitrary code, testing, and AI agent execution.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
GDPR compliant, EU-hosted. Sandbox isolation via microVMs. Public sandboxes are open by default — use private for sensitive code. No SOC2 certification documented.
⚡ Reliability
Best When
Your agent needs to create shareable, browser-accessible coding environments quickly, or run code in cloud microVMs with full Linux filesystem access.
Avoid When
You need persistent non-sleeping environments or GPU compute — use Fly Machines or Modal instead.
Use Cases
- • AI agents running code in isolated Devbox microVM environments with full Linux environment access
- • Interactive coding tutorials — agents creating and managing sandboxes for learners with pre-configured starter templates
- • PR preview environments — agents spinning up CodeSandbox environments per pull request for visual review
- • Code generation testing — agents creating sandboxes to validate generated code before deploying to production
- • Pair programming environments — agents creating shared collaborative coding environments via API
Not For
- • Long-running production services — CodeSandbox environments sleep after inactivity
- • GPU workloads — CodeSandbox Devboxes are CPU-only
- • Highly sensitive code that can't run in cloud — E2B or local sandboxing for security-critical isolation
Interface
Authentication
API token from account settings. OAuth for user-level access. GraphQL API for advanced queries. Devbox API (newer) uses separate authentication from classic sandbox API.
Pricing
Classic browser sandboxes are generous on free tier. Devbox (VM-based) hours are metered. AI features (Boxy) on paid plans.
Agent Metadata
Known Gotchas
- ⚠ Classic sandbox API and Devbox API are separate systems — different capabilities, auth, and endpoints
- ⚠ Devboxes sleep after 30 minutes of inactivity — agents must handle wake-up latency (3-10s) on reconnect
- ⚠ Public sandboxes are world-readable — agents creating sandboxes with sensitive code must use private sandboxes
- ⚠ Fork limits on free tier — high-volume template forking requires paid plan
- ⚠ CodeSandbox is primarily EU-hosted — latency implications for US-based agent deployments
Alternatives
Full Evaluation Report
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Scores are editorial opinions as of 2026-03-07.