---
title: "Monthly usage for one metric"
method: GET
path: "/v2/metrics/{metric_id}/usage/monthly"
tags: ["Querying"]
---

# Monthly usage for one metric

`GET /v2/metrics/{metric_id}/usage/monthly`

## Path parameters

- `metric_id` string, required

## Query parameters

- `aggregation` 'sum' | 'min' | 'max' | 'avg' | 'latest' | 'count' — Aggregation applied to corrected usage events. latest returns the quantity from the event with the latest occurred_at; ties use accepted_at then event ID. count returns the number of events.

## Response `200`

Metric or currency usage grouped by UTC calendar month.

- MetricMonthlyUsage
  - `aggregation` 'sum' | 'min' | 'max' | 'avg' | 'latest' | 'count', required — Aggregation applied to corrected usage events. latest returns the quantity from the event with the latest occurred_at; ties use accepted_at then event ID. count returns the number of events.
  - `data` MonthlyMetricQuantities[], required
    - `period_start_at` integer, required — Unix timestamp in seconds.
    - `data` MetricQuantity[], required
      - `metric_id` string, required — LedgerUp metric identifier, or the lowercase currency code for currency usage.
      - `currency` string, nullable, required — Lowercase currency code for currency usage. Null for normal metric usage.
      - `quantity` string, required — Aggregated decimal quantity serialized as a string.

## Other responses

- `401` — Missing or invalid API key.
- `403` — API key lacks the required permission, or reset was attempted outside the test namespace.
- `408` — Request exceeded the 30 second timeout.
- `422` — Semantically invalid request, such as a service period with start greater than end.
- `429` — Rate limit exceeded.
- `500` — Internal server error or queue failure.

---

[API](https://skmtc.dev/ledgerup/apis/ledgerup-api.md) · [All operations](https://skmtc.dev/ledgerup/apis/ledgerup-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ledgerup/ledgerup-api/revisions/be257191807b/schema)