Introduction
HallownestAPI
An open, structured data API for Hollow Knight and Silksong. Free, fan-made, non-commercial.
What it is
HallownestAPI exposes facts about the Hollow Knight games — boss HP, area names, item references, geo drops — as a stable REST JSON API. It is modeled on PokeAPI: predictable URLs, JSON in / JSON out, no API key required.
It is not a wiki. We do not host game assets, sprites, or copyrighted lore text — we link out to community wikis for that.
Make your first request
bash
curl https://hallownestapi.dev/api/v1/boss/false-knightThat’s it. See Quickstart for a TypeScript example or Endpoints for the full list.
Status
HallownestAPI is in v0 early preview. Only boss is currently exposed and seeded with a handful of entries. Expect breaking changes until v1.