Per the parent task, we will be limiting the maps API to only wikis and tools hosted on Wikimedia Foundation domains. However some affiliates or user groups may host volunteer or outreach tools on other domains.
If you are using the maps.wikimedia.org API for a Wikimedia affiliate or established wikiproject, please follow the instructions at https://wikitech.wikimedia.org/wiki/Maps/External_usage to file a new Phabricator task.