---
title: "Changes to Check if a concept or collection exists."
method: HEAD
path: "/conceptschemes/{scheme_id}/c/{c_id}"
---

# Changes to Check if a concept or collection exists.

`HEAD /conceptschemes/{scheme_id}/c/{c_id}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 24 revisions.

- **2026-03-16** `8bfc927527b6`: 1 info
- **2021-12-20** `720170256c20`: 1 breaking

## Changes

- **2026-03-16** `8bfc927527b6`: 1 info
  - endpoint added
- **2021-12-20** `720170256c20`: 1 breaking
  - api removed without deprecation

---

[Operation](https://skmtc.dev/onroerenderfgoed/apis/atramhasis-api/docs/conceptschemes/:scheme_id/c/:c_id/head.md) - [API](https://skmtc.dev/onroerenderfgoed/apis/atramhasis-api.md) - [Page](https://skmtc.dev/onroerenderfgoed/apis/atramhasis-api/changes/conceptschemes/:scheme_id/c/:c_id/head)