Dungeons and Dragons (Alternate) vs Universalis

Open5e is a community-run, keyless REST API for the 5e SRD — monsters, spells, classes, races, magic items, and more — with Django REST Framework-style search, filtering, field selection, and pagination built in. Its old v1 endpoints are now deprecated in favor of a v2 default, and the actual API is served from a separate `api.open5e.com` host distinct from the Next.js marketing/search site at `open5e.com`.

Universalis is a crowdsourced market board API for Final Fantasy XIV, aggregating item listings, prices, and sale history submitted by the game's own community-plugin ecosystem across every data center and world. It exposes a keyless REST API alongside a WebSocket feed for real-time listing updates, both free to use. The old `/docs/index.html` path now permanently redirects to a dedicated documentation site.