I'm a little confused about the new RDAP protocol and whenever it makes sense to pursue it any further. It looks to me like everyone agreed on it to be the successor of whois, but their databases seem empty. On ubuntu I tried rdapper, nicinfo and even their RESTful API:

http://rdap.org/domain/google.com (this results in a "File not Found", but is correct according to here)

Am I misunderstanding something? Is RDAP dead, did the service not start yet or am I doing something wrong? Nicinfo returns this:

nicinfo -t domain google.com
# NicInfo v.1.1.0-alpha
# Query yielded no results.

[ NOTICE ] Terms of Service
         1 By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois
           Terms of Use
     About https://www.arin.net/whois_tou.html

 [ ERROR ] DOMAIN NOT FOUND
      Code 404
         1 The domain you are seeking as 'google.com.' is/are not here.

rdapper returns this:

rdapper --TYPE domain google.com
Error: 404 No RDAP service for domains like 'google.com' is registered at rdap.org

If RDAP is supposed to be working, can someone tell me what I did wrong?

Peter Krauss

Direct short answer

The answer to "How to successfully use RDAP protocol instead of WHOIS?" is: there are no way to successfully use RDAP, only, perhaps, to try some experimental implementation... But even experimental, I not know how to try it.

Answer to your wrong hypothesis

The URL that you used is wrong, so, in part, your question details started with wrong hypothesis.

The domain RDAP.ORG is not an "official authority", it is a owned by a commercial organization, so it is a false ".ORG". There are a footer at rdap.org pages acknowledging that is no offcial service, and is a tau.uk.com playground. Try some RDAP client.

Best interpretation and long answer

This ICANN report of 2015-12-03, "Registration Data Access Protocol (RDAP) Operational Profile for gTLD Registries and Registrars", have some clues, some history, ... and fished with

(...) it is premature to include a requirement for all gTLDs in the RDAP Profile (...) A call for volunteers is planned by January 2016.

So, no one decides to enforce RDAP on all registrars... And there are no "call for volunteers" announced this year.

Dream with an intermediate alternative

The main problem with WHOIS today is the "free interpretation" of the published information. There are no "standard Rosetta stone", but we can start one (!), to offer a maturity intermediary for RDAP.