sistemo (Python)
Run AI agents and untrusted code in real isolated Firecracker microVMs — self-host for free or use the cloud.
pip install sistemo
Quickstart (< 10 lines)
from sistemo import Sandbox
with Sandbox() as sb: # reads SISTEMO_API_KEY
result = sb.run("python -c 'print(2 + 2)'")
print(result.stdout, result.exit_code) # "4\n" 0
Get an API key from the dashboard (Dashboard → API Keys), then:
export SISTEMO_API_KEY=sk_live_xxxxxxxx
Configuration
SISTEMO_API_KEY |
your key (sk_live_…). Required. |
SISTEMO_BASE_URL |
override the API URL (default https://api.sistemo.io; e.g. your self-hosted control plane). |
Or pass them explicitly: Sandbox(api_key="sk_live_…", base_url="https://…").
API
sb = Sandbox(vcpus=1, memory_mb=1024, stack="base") # provisions a microVM
res = sb.run("echo hi && uname -a", timeout=30) # -> ExecResult
res.stdout, res.stderr, res.exit_code, res.ok
sb.close() # destroy (or use `with`)
A read API key can list resources but cannot create sandboxes or run code — use a full key with the SDK.
Errors
from sistemo import APIError, AuthError, QuotaExceededError
try:
with Sandbox() as sb:
sb.run("...")
except QuotaExceededError as e:
# An account limit was reached. `detail` names which one and how much is in
# use. Retrying SUCCEEDS once you free that resource — stop or destroy a
# machine, delete a volume — or once the limit is raised.
print(e.detail)
except AuthError:
... # 401/403 — key missing/invalid/revoked, or read-only key
except APIError as e:
print(e.status, e.detail, e.code)
Both QuotaExceededError and AuthError arrive as HTTP 403, so catch
QuotaExceededError first — it is a subclass of APIError, not of AuthError,
precisely because the two need opposite handling: an auth failure never succeeds
on retry, a quota refusal does once you free something. GET /v1/quotas reports
every limit alongside current usage.
Zero runtime dependencies (Python stdlib only). Apache-2.0.
1 maintainer
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