Hi All,
I have a critical issue i wanted to discuss with some on the hubspot end.
We have clients which Integrate with Hubspot Contact Lists. The integration creates a list in Hubspot and stores in the database.
Then it uses these stored IDs to add or remove contacts to the list.
We recently migrated the integration to utilize V3 list endpoints
Update List Names endpoint
/crm/v3/lists/{list_id}/update-list-name
/crm/v3/lists/{listId}/memberships/add
/crm/v3/lists/{listId}/memberships/remove
Everything was great until we started getting complaints from our customers (currently we have 80+ HS accounts running this integration actively) that their contacts are no longer being added or removed within created lists. Upon investigating we found out that the lists created using v1 endpoints are not backward compatible with v3 endpoints and we need to convert these to the new one. We were quite surprised that this limitation was not clearly mentioned in the V3 API release communications. Generally, we would expect such a fundamental change—particularly involving unique identifiers—to maintain backward compatibility or at least provide a migration path.
Could the Hubspot team share the next steps? Or is there a way for us to submit a request to review this functionality?