Mish Ushakov
4a4bb36839
## Summary - Both JS and Python SDKs now validate that the configured E2B API key matches `e2b_` followed by 40 hex characters (mirroring the server-side check in [`infra/.../keys/key.go`](https://github.com/e2b-dev/infra/blob/main/packages/shared/pkg/keys/key.go#L66)) and throw `AuthenticationError` / `AuthenticationException` with an example token (`e2b_0000…`) and a link to the API Keys dashboard tab. - Validation runs inside `ApiClient` / `ApiClient.__init__` whenever an API key is present, so callers get immediate, actionable feedback instead of a generic 401 from the server. - Added unit tests (`validateApiKey.test.ts`, `test_validate_api_key.py`) and updated existing fixtures that used placeholder keys like `'test-key'` / `'base-api-key'` to use the valid format. ## Test plan - [x] `pnpm run format`, `pnpm run lint`, `pnpm run typecheck` - [x] `pnpm exec vitest run tests/api/validateApiKey.test.ts tests/api/handleApiError.test.ts tests/sandbox/abortSignal.test.ts tests/template/abortSignal.test.ts tests/sandbox/configPropagation.test.ts tests/connectionConfig.test.ts` - [x] `poetry run pytest tests/test_validate_api_key.py tests/test_api_client_transport.py tests/sync/sandbox_sync/test_config_propagation.py tests/async/sandbox_async/test_config_propagation.py tests/test_connection_config.py` 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
What is E2B?
E2B is an open-source infrastructure that allows you to run AI-generated code in secure isolated sandboxes in the cloud. To start and control sandboxes, use our JavaScript SDK or Python SDK.
Run your first Sandbox
1. Install SDK
pip install e2b
2. Get your E2B API key
E2B_API_KEY=e2b_***
3. Start a sandbox and run commands
from e2b import Sandbox
with Sandbox.create() as sandbox:
result = sandbox.commands.run('echo "Hello from E2B!"')
print(result.stdout) # Hello from E2B!
4. Code execution with Code Interpreter
If you need run_code(), install the Code Interpreter SDK:
pip install e2b-code-interpreter
from e2b_code_interpreter import Sandbox
with Sandbox.create() as sandbox:
execution = sandbox.run_code("x = 1; x += 1; x")
print(execution.text) # outputs 2
5. Check docs
Visit E2B documentation.
6. E2B cookbook
Visit our Cookbook to get inspired by examples with different LLMs and AI frameworks.