---
title: "Get reference series history"
method: GET
path: "/v1/series/history"
tags: ["Reference Series"]
---

# Get reference series history

`GET /v1/series/history`

## Request

- Base URL: `https://api.liquidcompute.co`
- URL: `https://api.liquidcompute.co/v1/series/history`
- Auth: API key in header `X-API-Key`

Returns one series' value for each period starting within the
inclusive `start`–`end` date window, oldest first. Either bound may
be omitted. A period's value is the most recent reading of it.
`start` after `end` returns `400`; an unknown token series returns `404`.
Retired `power-*` identifiers return `400` before any upstream lookup.

Requires the `reference-series` entitlement family; requests without
it return `404` `not_found`.

## Query parameters

- `id` string, required
- `start` string, date
- `end` string, date

## Response `200`

The series' values, oldest first.

- ReferenceSeriesHistoryResponse
  - `id` string, required
  - `points` ReferenceSeriesPoint[], required
    - `period_start` string, date, required
    - `period_end` string, date, required: Exclusive end of the period.
    - `value` number, required: The period's value in the token series' unit.

## Other responses

- `400`: Invalid or unsupported query parameter.
- `401`: Missing or invalid API key.
- `404`: Unknown endpoint, unavailable resource, or an index or index family outside your authorization.
- `429`: Rate limit exceeded.
- `502`: Upstream service or gateway configuration failure.
- `503`: API-key validation is temporarily unavailable.

---

[API](https://skmtc.dev/liquidcompute/apis/liquidcompute-api.md) - [All operations](https://skmtc.dev/liquidcompute/apis/liquidcompute-api/llms.txt) - [OpenAPI document](https://skmtc.dev/liquidcompute/apis/liquidcompute-api/revisions/f58bc0aabb07?raw)