Check to see if a Contact matches a Segment using the given externalIdCopy Pageget https://{yourAccountName}.api-us1.com/api/3/segmentMatch/{segmentId}/{contactId}/{externalId}Path ParamssegmentIdstringrequiredSegmentIdcontactIdnumberrequiredContactIdexternalIdstringrequiredexternalIdResponses 200Segment, Contact & ExternalId evaluation completed 400Bad Request 401Unauthorized 403Forbidden 404Not FoundUpdated 4 days ago