# How do I make a messaging sytem using only API

**URL:** <https://community.hubspot.com/t/how-do-i-make-a-messaging-sytem-using-only-api/143729>\
**Category:** APIs & Integrations\
**Tags:** how-to\
**Created:** [December 5, 2025, 7:49am UTC](https://community.hubspot.com/t/how-do-i-make-a-messaging-sytem-using-only-api/143729 "2025-12-05T07:49:00Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Berangere](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/berangere/32/220784_2.png) [@Berangere](https://community.hubspot.com/u/Berangere)\
**Post date:** [December 8, 2025, 12:22pm UTC](https://community.hubspot.com/t/how-do-i-make-a-messaging-sytem-using-only-api/143729/4 "2025-12-08T12:22:32Z")

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Hi @DesperateCoder and great job mapping this out!  
Your steps are accurate with one clarification:  
For step 6, you can filter threads by associatedContactId as a query parameter, but the endpoint is GET /conversations/v3/conversations/threads (not a separate endpoint).  
I hope this helps!  
Have a lovely day!  
Bérangère  
_This post was created with the assistance of AI tools._

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