---
title: "Changes to Bulk update attachments"
method: POST
path: "/api/streams/{streamName}/attachments/_bulk"
---

# Changes to Bulk update attachments

`POST /api/streams/{streamName}/attachments/_bulk`

> Every recorded change to this endpoint, newest first.
> 176 revisions in range; 20 not diffed.

## Timeline

Changed in 1 of 176 revisions.

- **2026-09-22** `3e7e7b646f2e` — 1 breaking, 1 warning, 1 info

## Changes

- **2026-09-22** `3e7e7b646f2e` — 1 breaking, 1 warning, 1 info
  - removed `subschema #1, subschema #2` from the `operations/items/` request property `anyOf` list
  - for the `path` request parameter `streamName`, the maxLength was set to `200`
  - added `subschema #1, subschema #2` to the `operations/items/` request property `anyOf` list

---

[Operation](https://skmtc.dev/elastic/apis/kibana-apis/docs/api/streams/:streamName/attachments/_bulk/post.md) · [API](https://skmtc.dev/elastic/apis/kibana-apis.md) · [Page](https://skmtc.dev/elastic/apis/kibana-apis/changes/api/streams/:streamName/attachments/_bulk/post)