The 'service' is basically hosting this file: https://www.schemastore.org/api/json/catalog.json https://www.schemastore.org/api/json/catalog.json - you could ho

The 'service' is basically hosting this file: https://www.schemastore.org/api/json/catalog.json https://www.schemastore.org/api/json/catalog.json - you could host that locally and point your software to it, modifying the other URLs where needed It's a pity the catalog format doesn't support an 'import' or relative URLs for schemas - would have made local extensions a bit easier.