I built a free, public JSON API that serves data for 2,600+ online slot games from 21 providers.
## Why?
I run slot.report, a German slot review site. While building it, I realized there’s no free, open source for structured slot data. Every existing database is either paywalled, requires B2B contracts, or locked behind Cloudflare.
So I built one.
## What data?
Every slot has:
- RTP (Return to Player) — 100% coverage
- Volatility (low → extreme) — 100% coverage
- Max Win multiplier — 100% coverage
- Grid, release date, hit frequency, provider
Providers include Pragmatic Play, Play’n GO, NetEnt, Nolimit City, Hacksaw Gaming, BGaming, Red Tiger, ELK Studios, and 13 more.
## How to use
Endpoints return JSON. No API key, no auth, no signup.
Get all slots:
bash
curl https://slot.report/api/v1/slots.json
Get a single slot:
curl https://slot.report/api/v1/slots/gates-of-olympus.json
Filter by provider:
curl https://slot.report/api/v1/providers/pragmatic-play.json
Quick example in JavaScript:
const res = await fetch('https://slot.report/api/v1/slots.json');
const { results } = await res.json();
const highVolatile = results.filter(s =>
s.volatility === 'extreme' && s.max_win >= 10000
);
console.log(`${highVolatile.length} extreme slots found`);
API Docs
Full documentation with all endpoints, data fields, and code examples:
https://slot.report/api/
Tech stack
- Static JSON files served by nginx
- Data collected from official provider websites
- Updated weekly
- CORS enabled, no rate limits for normal use
Free to use. If you build something with it, I'd love to hear about it.