---
title: "Changes to Add new items to an IoC collection"
method: POST
path: "/collections/{id}/relationships/{relationship}"
---

# Changes to Add new items to an IoC collection

`POST /collections/{id}/relationships/{relationship}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 2 revisions.

- **2026-11-03** `a15abb3e8389`: 1 breaking, 2 info

## Changes

- **2026-11-03** `a15abb3e8389`: 1 breaking, 2 info
  - the `header` request parameter `x-apikey` became required
  - api operation id `post_collections-id-relationships-relationship` removed and replaced with `add-element-to-ioc-collection`
  - api tag `Threat Actors, Malware & Tools, Campaigns, IoC Collections` added

---

[Operation](https://skmtc.dev/virustotal/apis/threat-landscape/docs/collections/:id/relationships/:relationship/post.md) - [API](https://skmtc.dev/virustotal/apis/threat-landscape.md) - [Page](https://skmtc.dev/virustotal/apis/threat-landscape/changes/collections/:id/relationships/:relationship/post)