Get Custom Data Detail Item by External Key

code examples curl request get \\ \ url https //api b preview\ loyaltyservices io/api/v3/custom data/{customdataid}/details/externalkey;{externalkey} \\ \ header 'accept application/json'require "uri" require "json" require "net/http" url = uri("https //api b preview\ loyaltyservices io/api/v3/custom data/{customdataid}/details/externalkey;{externalkey}") https = net http new(url host, url port) https use ssl = true request = net http get new(url) request\["accept"] = "application/json" request\["content type"] = "application/json" response = https request(request) puts response read body import requests import json url = "https //api b preview\ loyaltyservices io/api/v3/custom data/{customdataid}/details/externalkey;{externalkey}" payload = {} headers = { 'accept' 'application/json', 'content type' 'application/json' } response = requests request("get", url, headers=headers, data=payload) print(response text) okhttpclient client = new okhttpclient() newbuilder() build(); mediatype mediatype = mediatype parse("application/json"); requestbody body = requestbody create(mediatype, ""); request request = new request builder() url("https //api b preview\ loyaltyservices io/api/v3/custom data/{customdataid}/details/externalkey;{externalkey}") method("get", body) addheader("accept", "application/json") addheader("content type", "application/json") build(); response response = client newcall(request) execute(); responses // success { "detailid" 1, "externalkey" "abc123", "description" "abc 123", "status" "active", "additionalproperties" "", "updatedatetime" "2026 06 02t00 00 00", "createusername" "", "updateusername" "" }// bad request { "errors" \[ { "code" "", "fieldname" "", "message" "", "messageparameters" \[ {} ] } ] }// unauthorized // forbidden // internal error