Every AI action.
Observable.
Your AI agents run hundreds of times a day. Sentinel shows you exactly what happened in each run — step by step. Catch issues before your users do, and prove compliance when auditors ask.
● Live event stream
How it works
Three lines of code.
Full agent visibility.
Install
Add the SDK and wrap your agent with one decorator. Zero changes to your agent logic, zero latency added.
@sentinel.wrap("paybot", "invoke")Stream
Every invocation fires a non-blocking event. Tag with a session_id to group steps into a full run trace.
POST /v1/events → 202Observe
Watch your agents in real-time. Explore session traces, review flagged actions, export audit reports.
GET /sessions → traceTamper-proof record
Every event links to the last.
Deletion is detectable. Reordering is detectable.
Built for teams shipping agents
See everything your agents do.
Prove it when you need to.
Session traces
Group events by session ID into step-by-step run traces. See exactly what your agent did — from first LLM call to final decision.
Tamper-proof audit log
SHA-256 chain links every event. Any mutation or deletion breaks the chain instantly — verifiable by anyone.
Non-blocking SDK
Events fire in daemon threads. Your agent never waits for Sentinel. Zero latency impact on production.
Flag & escalate
Mark suspicious events for review. Compliance officers see the full audit trail with plain-English summaries coming soon.
PDF audit reports
One-click PDF exports of any time range, ready for auditors and regulators.
Role-based access
Engineers see raw events and traces. CCOs see summaries. Nobody sees what they shouldn't.
Pricing
Simple, transparent pricing.
Start free while you evaluate. Scale when your compliance team needs it.
Free
For developers evaluating Sentinel.
- 2,500 events / month
- Unlimited agents
- Session traces
- Dashboard & metrics
- Python & Node SDKs
Pro
Most popularFor teams shipping production AI agents.
- 250,000 events / month
- Unlimited agents
- 90-day log retention
- PDF audit reports
- Flag & escalate workflow
- AI plain-English summaries (coming soon)
- Priority support
Enterprise
For regulated industries that need airtight compliance.
- Unlimited events
- Unlimited agents
- 365-day+ retention
- PDF audit reports
- SOC 2 Type II
- SSO / SAML
- Dedicated SLA
- Custom data residency
- Contract billing
All plans include the Python and Node.js SDKs, SHA-256 chain integrity, and the dashboard. No credit card required for Free.
Know what your agents do.
Prove it to anyone who asks.
Sentinel gives your engineering team full visibility into production agent behavior — and gives your compliance team the tamper-proof records they need. Both, from one SDK call.