# Microgram: cusum-monitor

`station__algovigilance__microgram-cusum-monitor` · native (always callable) · domain `algovigilance` · pv-relevance `pv-core`

CUSUM (cumulative sum) control chart for sequential signal surveillance. Classifies monitoring state based on cumulative deviation from baseline and threshold breach.

## Agent metadata

- `idempotent`: true
- `read_only`: true
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `previous_cusum` *number* — Cumulative sum from previous observation (scaled x100 for integer math)
- `threshold_h` *number* — Decision threshold for shift detection (scaled x100)
- `current_value` *number* — Current observed value (scaled x100)
- `baseline_mean` *number* — Expected baseline mean (scaled x100)

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__algovigilance__microgram-cusum-monitor",
    "arguments": {}
  }
}
```

## Related

- [/tools](/tools) — all 7718 tools
- [/tools/algovigilance__microgram-cusum-monitor](/tools/algovigilance__microgram-cusum-monitor) — HTML page
- [/tools/algovigilance__microgram-cusum-monitor/json](/tools/algovigilance__microgram-cusum-monitor/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide