# Companies Batch Upsert API endpoint

**URL:** <https://community.hubspot.com/t/companies-batch-upsert-api-endpoint/127307>\
**Category:** APIs & Integrations\
**Tags:** companies\
**Created:** [March 4, 2025, 6:07pm UTC](https://community.hubspot.com/t/companies-batch-upsert-api-endpoint/127307 "2025-03-04T18:07:57Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![evaldas](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/evaldas/32/69160_2.png) [@evaldas](https://community.hubspot.com/u/evaldas)\
**Post date:** [March 7, 2025, 6:31pm UTC](https://community.hubspot.com/t/companies-batch-upsert-api-endpoint/127307/3 "2025-03-07T18:31:56Z")

</div>

Hi @fancyHS,

Your logic in attempting this is correct. However, it looks like the “primary unique identifier” does not necessarily mean that the property itself actually is a unique property (it does not require unique values) - as it is possible to enter the same domain name for multiple company records. Certainly confusing.

Someone else recently asked about the Company upsert endpoint and I provided a suggestion on how to work around this limitation in this thread: [https://community.hubspot.com/t5/APIs-Integrations/Create-or-update-a-batch-of-contacts-by-unique-property-values/m-p/1119484/highlight/true#M80755](https://community.hubspot.com/t5/APIs-Integrations/Create-or-update-a-batch-of-contacts-by-unique-property-values/m-p/1119484/highlight/true#M80755)

I realize the solution is not ideal but hopefully helps explain the situation.

---

_[View the full topic](https://community.hubspot.com/t/companies-batch-upsert-api-endpoint/127307)._