# Trigger webhook when Deal associations changes **URL:** \ **Category:** APIs & Integrations\ **Tags:** webhooks\ **Created:** [September 11, 2019, 12:24pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191 "2019-09-11T12:24:46Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Zikoel](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/zikoel/32/841_2.png) [@Zikoel](https://community.hubspot.com/u/Zikoel)\ **Post date:** [September 11, 2019, 12:24pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/1 "2019-09-11T12:24:46Z")
Hi, Is actually possible to trigger a Webhook when a Deal associations is changing? ---
**Author:** ![WendyGoh](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/wendygoh/32/42320_2.png) [@WendyGoh](https://community.hubspot.com/u/WendyGoh)\ **Post date:** [September 12, 2019, 3:22am UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/2 "2019-09-12T03:22:56Z")
Hi @Zikoel, I hope all is well with you šŸ˜„ Edited: Currently the HubSpot Webhook does not support the `num_associated_contacts` as this property (also known as calculated property) is treated differently on the back end. Hereā€™s a list of calulated properties: **Contacts:** - days\_to\_close - recent\_conversion\_event\_name - recent\_conversion\_date - first\_conversion\_event\_name - first\_conversion\_date - num\_unique\_conversion\_events - num\_conversion\_events **Deals** - num\_associated\_contacts I hope this helps to clarify! ---
**Author:** ![Anders\_Iversen](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/anders_iversen/32/77566_2.png) [@Anders\_Iversen](https://community.hubspot.com/u/Anders_Iversen)\ **Post date:** [October 21, 2019, 5:15pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/3 "2019-10-21T17:15:38Z")
Hi Wendy I canā€™t seem to find the **num\_associated\_contacts property** when I try to add a new subscribtion to my webhook. I choose deal as object type, property changed as event to listen for, and then thereā€™s no **num\_associated\_contacts** in the list of properties (Iā€™ve also looked for something similar choosing contact or company as object\_type. What am I doing wrong? Thanks in advance! ---
**Author:** ![kloganproteus](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/kloganproteus/32/87988_2.png) [@kloganproteus](https://community.hubspot.com/u/kloganproteus)\ **Post date:** [February 24, 2020, 4:59pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/4 "2020-02-24T16:59:13Z")
Wendy, The API docs ([Accounts Dashboard | HubSpot](https://developers.hubspot.com/docs/methods/webhooks/webhooks-overview)) now says that the num\_associated\_contacts property of Deal is not supported for webhooks. Do you know if that is correct or if it has changed recently? Iā€™m trying to find a way to get notified when a Contact is added/removed from a Deal or a Company and came across this post. ---
**Author:** ![WendyGoh](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/wendygoh/32/42320_2.png) [@WendyGoh](https://community.hubspot.com/u/WendyGoh)\ **Post date:** [February 25, 2020, 1:16am UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/5 "2020-02-25T01:16:30Z")
Hey @kloganproteus, Sincere apologise for the misinformation above. As Derek mentioned [in this dev forum](https://community.hubspot.com/t5/APIs-Integrations/Contact-Conversion-Webhooks-not-firing/td-p/235663), the `num_associated_contacts` isnā€™t a supported property for HubSpot Webhook, as this property is treated differently from our backend. ---
**Author:** ![lazevedo](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/lazevedo/32/39641_2.png) [@lazevedo](https://community.hubspot.com/u/lazevedo)\ **Post date:** [March 27, 2023, 5:00pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/6 "2023-03-27T17:00:37Z")
Hubspot has fixed this issue, Webhooks now allow to subscribe to association changes, this is a very welcomed improvement. ![hubspot-association-changed.png](https://d2qpr2jzcazej7.cloudfront.net/original/3X/f/8/f8a526c66321fc4d825204235d93d5b1b9074a0c.png) ---
**Author:** ![Jaycee\_Lewis](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/jaycee_lewis/32/61352_2.png) [@Jaycee\_Lewis](https://community.hubspot.com/u/Jaycee_Lewis)\ **Post date:** [March 27, 2023, 7:59pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/7 "2023-03-27T19:59:36Z")
Hey, @lazevedo šŸ‘‹ Thank you very much for being a hero and updating this older post with current details šŸ™Œ ā€” Jaycee ---
**Author:** ![dcabrera](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/dcabrera/32/39641_2.png) [@dcabrera](https://community.hubspot.com/u/dcabrera)\ **Post date:** [October 12, 2020, 2:38pm UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/8 "2020-10-12T14:38:55Z")
Hi , I have this same issue now , i need a way to trigger and update to my ERP when a deal associate any contact , i already have webhooks to make update on other properties , but there isnā€™t a subscription type to listen this kid of change ? ---
**Author:** ![ArunSundaram](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/arunsundaram/32/39641_2.png) [@ArunSundaram](https://community.hubspot.com/u/ArunSundaram)\ **Post date:** [February 17, 2021, 4:34am UTC](https://community.hubspot.com/t/trigger-webhook-when-deal-associations-changes/16191/9 "2021-02-17T04:34:48Z")
Hi, As mentioned above, though ā€œnum\_associated\_contactsā€ is mentioned as not being supported by webhooks, I could manually add a subscription for this field (for Deal type) and **I am able to receive propertyChanged** payload for this property when a contact is newly associated/removed from a deal. Is this not expected to happen? Arun