@Anton.Kokh and team will be looking into this.

Via a deprecated (?) documentation page I found instructions to create requests via Phabricator like this: T398820: Add RKD to WDQS allowlist (this is a real request)

It would be good to clarify and update https://www.wikidata.org/wiki/Wikidata%3ASPARQL_federation_input (or deprecated and redirect it) and update the procedure so that it's clear what people like us need to do today :-)

Thank you!

@Lydia_Pintscher Do I understand right that the problem in this ticket is that the procedure to suggest changes to the Allowlist is too obscure, which could be addressed by the update of the WIkidata documentation?

In T398793#10982096, @Anton.Kokh wrote:

@Lydia_Pintscher Do I understand right that the problem in this ticket is that the procedure to suggest changes to the Allowlist is too obscure, which could be addressed by the update of the WIkidata documentation?

Yes plus that the list contains endpoints that don't work any longer.

Update:
The new process for nominating endpoints is live: https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/Federated_queries/Allowlist
The process for cleaning the list from non-operational endpoints is in development.