# 31 sentinels. 5 tiers. Always probing.

The sentinel grid is BrainstormMSP's continuous observability layer. Sentinels probe vendor APIs, AI services, intelligence sources, edge fleet endpoints, and platform internals. Aggregate health publishes to /status; per-tenant detail surfaces inside MSP.

## Tier 1 · Platform
### 7 platform sentinels.
- API health  
- Database latency  
- NATS message lag  
- ALB target health  
- ECS task health  
- Keycloak auth path  
- Signing-key envelope availability

## Tier 2 · Vendor
### 8 vendor sentinels.
- RMM (ConnectWise, Datto)  
- EDR (CrowdStrike, SentinelOne)  
- IDP (Okta, Azure AD)  
- Ticketing (Jira, ServiceNow)  
Each probes connector health + sample-call latency.

## Tier 3 · AI
### 6 AI sentinels.
- Anthropic  
- OpenAI  
- Google  
- xAI  
- Perplexity  
- Mistral  
Hourly probes of latency + correctness on a known-answer benchmark.

## Tier 4 · Intelligence
### 5 intelligence sentinels.
- Threat intelligence feeds  
- CVE bulletins  
- Dark-web monitors  
- Breach databases  
- Ransomware leak sites.

## Tier 5 · Edge Fleet
### 5 fleet sentinels.
- Endpoint check-in rates  
- Agent heartbeat distribution  
- OS update lag  
- EDR coverage  
- Configuration drift.

## See live sentinel state.
The /status page renders aggregate sentinel health. The MSP dashboard exposes per-tenant detail.