Get contacts filter by custom field value


I am not getting any help on documentation to fetch data based on a custom field in contact and company entity.

Request type: GET
Url: “

Custom field name is: “externalID”
Custom field value is : “12345”

Now I need to use custom field value to fetch record from contact.

Please help.

I don’t think they have that level of querying in REST yet. Have you considered using the SDK for things not yet available in REST? It definitely can be done with the SDK.