---
title: "compute_slo"
description: "Compute SLI/SLO metrics from InfluxDB query results."
sidebarTitle: "compute_slo"
lastUpdated: "2026-09-23"
---

> **For AI agents:** the complete documentation index is at [llms.txt](/llms.txt). Append `.md` to any page URL for its markdown version.

{/* GENERATED FILE: do not edit by hand. Regenerate with: node scripts/generate.mjs */}

Compute SLI/SLO metrics from InfluxDB query results.

<Note>
  **Read-only · Calls external systems.** Safe to call: this tool does not modify data.
</Note>

## Parameters

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `good_field` | string | No | Field name for good events (default 'good') |
| `operator` | string | Yes | Operator slug (= InfluxDB database name) |
| `precision` | string | No | Query time precision (s, ms, u, ns) |
| `query` | string | Yes | InfluxQL query returning good/total fields |
| `slo_target` | number | Yes | SLO target percentage (e.g. 99.9) |
| `total_field` | string | No | Field name for total events (default 'total') |
| `window` | string | No | SLO window (default '30d'). Supported: Nd, Nh |

## Example arguments

Illustrative arguments an agent supplies when calling this tool:

```json
{
  "operator": "string",
  "query": "string",
  "slo_target": 0
}
```

## Description

```text
Uses Google SRE burn-rate methodology.

Prerequisite: Run query_metrics with SHOW MEASUREMENTS and SHOW FIELD KEYS first to discover which measurement contains success/failure counts.

Example: SELECT sum("number_success") AS good, sum("number_success") + sum("number_failed") AS total FROM "test" WHERE time > now() - 30d GROUP BY time(1d)

The tool extracts good/total fields, computes SLI, error budget, burn rate, and severity.

Severity thresholds (Google SRE):
- critical: burn rate > 14.4x (page immediately)
- red: burn rate > 6x (create ticket)
- yellow: burn rate > 1x (SLO at risk)
- green: burn rate <= 1x (within budget)
```

## Related

- [`query_metrics`](/mcp/tools/metrics/query_metrics)

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