---
title: "List series"
method: GET
path: "/api/v1/series"
---

# List series

`GET /api/v1/series`

Return the list of label sets (unique metric identities) that match
a set of series selectors. This is useful for discovering which time
series exist for a given metric name or label combination.

At least one `match[]` argument must be provided. Each `match[]`
value is a PromQL series selector (e.g. `up`, `http_requests_total{method="GET"}`).
Multiple selectors are OR'd together — a series is returned if it
matches any of the provided selectors.

Also accepts POST with a `application/x-www-form-urlencoded` body
containing the same parameters.

## Query parameters

- `match[]` string[]
- `start` string
- `end` string
- `limit` integer

## Response `200`

Array of label sets, one per matching series. Each label set is
an object whose keys are label names and values are label values.
The `__name__` label contains the metric name.

- SeriesResponse — Response for the series listing endpoint (`/api/v1/series`). On success, `data` contains an array of label sets — one object per matching time series.
  - `status` 'success' | 'error', required
  - `data` object[] — Array of label sets, one per matching series. Each object is a map of label names to label values. The `__name__` label contains the metric name.
  - `error` string — Human-readable error message (present when status is `error`).
  - `errorType` string — Error category (present when status is `error`).

## Other responses

- `400` — Bad request. No `match[]` selectors were provided, or a selector is malformed. The `errorType` will be `bad_data`.
- `500` — Internal server error. The `errorType` will be `internal`.
- `503` — Service unavailable. The `errorType` will be `unavailable`.

---

[API](https://skmtc.dev/opendata-oss/apis/opendata-timeseries-api.md) · [All operations](https://skmtc.dev/opendata-oss/apis/opendata-timeseries-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/opendata-oss/opendata-timeseries-api/revisions/6e511aad037c/schema)