---
title: "Check whether one public population reference exists"
method: HEAD
path: "/api/v1/event-rates/reference"
---

# Check whether one public population reference exists

`HEAD /api/v1/event-rates/reference`

## Request

- Base URL: `https://probable.media`
- URL: `https://probable.media/api/v1/event-rates/reference`
- Auth: none declared

## Query parameters

- `id` string, required

## Response `200`

Reference exists

## Other responses

- `400`: Missing id
- `404`: Unknown population reference id

---

[API](https://skmtc.dev/probable/apis/probable-public-api.md) · [All operations](https://skmtc.dev/probable/apis/probable-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/probable/apis/probable-public-api/revisions/28e1acd459f3?raw)