---
title: "Checks if a key exists and get object metadata."
method: HEAD
path: "/layers/{layerId}/keys/{key}"
tags: ["by-key"]
---

# Checks if a key exists and get object metadata.

`HEAD /layers/{layerId}/keys/{key}`

Checks if a blob exists for the requested key. You can also use it to fetch object metadata.

## Path parameters

- `layerId` string, required
- `key` string, required

## Response `200`

OK - key exists.

## Other responses

- `401` — Unauthorized - the request didn't provide correct authentication details
- `403` — Forbidden - the specific account doesn't have correct privileges to perform the operation
- `404` — Not Found - the specified resource was not found
- `500` — Server unavailable or internal server error
- `502` — Server unavailable or internal server error
- `503` — Server unavailable or internal server error
- `504` — Server unavailable or internal server error

---

[API](https://skmtc.dev/here/apis/query-api-v1.md) · [All operations](https://skmtc.dev/here/apis/query-api-v1/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/here/query-api-v1/revisions/30e5d2645407/schema)