V2-Related Records using External ID-Update Related Records Using External ID

Number of APIs: 2

1. Associating a Contact and a Deal using the contact's record ID and the deal's external ID PUT {{api-domain}}/crm/v2/Contacts/111111000000085009/Deals

2. Associating a Contact and a Deal using their external IDs PUT {{api-domain}}/crm/v2/Contacts/extcontact3/Deals