---
title: "SendDataSetWriterKeyFrame"
method: POST
path: "/v2/diagnostics/writergroups/{dataSetWriterGroup}/writers/{dataSetWriterId}/keyframe"
tags: ["Diagnostics"]
---

# SendDataSetWriterKeyFrame

`POST /v2/diagnostics/writergroups/{dataSetWriterGroup}/writers/{dataSetWriterId}/keyframe`

Request that a single dataset writer emits a key frame message on its next publish.

## Path parameters

- `dataSetWriterGroup` string, required
- `dataSetWriterId` string, required

## Response `200`

The operation was successful.

## Other responses

- `404` — The item was not found.
- `500` — An unexpected error occurred

## Changes

- **2026-08-31** `6a0e0e1a68ac` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/azure/apis/opcpublisher/changes/v2/diagnostics/writergroups/:dataSetWriterGroup/writers/:dataSetWriterId/keyframe/post.md)

---

[API](https://skmtc.dev/azure/apis/opcpublisher.md) · [All operations](https://skmtc.dev/azure/apis/opcpublisher/llms.txt) · [OpenAPI document](https://skmtc.dev/azure/apis/opcpublisher/revisions/6a0e0e1a68ac?raw)