The Toolforge service is changing the domain for webservices hosted in that platform. More rationale can be found here: https://wikitech.wikimedia.org/wiki/News/Toolforge.org
Previous domain and tool name: tools.wmflabs.org/<tool>
New domain and tool name: <tool>.toolforge.org
Testing this change with @Urbanecm we noticed that the maps server (maps.wikimedia.org) applies some ratelimiting to requests based on the referrer.
The old domain works while the new one gets HTTP 429 "Too many requests".
This might be related to the changes applied in T244278: Document 2020-02-04 kartotherian incident