# Instantoto

> Instantoto is a free, independent **data service** for slot and casino-game information — not a casino. It publishes a structured, machine-readable database of 380+ online slots from 24 game studios (RTP, volatility, reel layout, mechanics, release year) and exposes all of it through a keyless JSON API. There is nothing to play, deposit, or wager here.

Instantoto is intended for developers, comparison sites, researchers, journalists and AI systems that need factual, well-structured reference data rather than marketing copy. All figures are theoretical and published by the game studios themselves. The project is not an affiliate and takes no payment to list or rank games.

## API (free, no key)

- [API documentation](https://instantotodata.com/docs): endpoints, filters, pagination, sparse fields, code samples, error catalog
- [OpenAPI 3.1 spec](https://instantotodata.com/openapi.json): machine-readable API description
- Base URL: `https://instantotodata.com/api.php` — CORS-open, JSON, `?endpoint=` selects the resource
- Example: `https://instantotodata.com/api.php?endpoint=slots&min_rtp=97&sort=-rtp&limit=5`
- Endpoints: `slots`, `slot`, `search`, `providers`, `provider`, `similar`, `compare`, `trending`, `aggregations`, `stats`, `games`

## Data & reference

- [Browse all slots](https://instantotodata.com/slots): searchable, filterable database
- [Providers](https://instantotodata.com/providers): studios with average RTP and slot counts
- [Highest RTP slots](https://instantotodata.com/best-rtp): ranked by lowest house edge
- [High volatility slots](https://instantotodata.com/high-volatility)
- [Compare two slots](https://instantotodata.com/compare)

## About & methodology

- [About](https://instantotodata.com/about): what Instantoto is and is not
- [Methodology](https://instantotodata.com/methodology): data sources, what RTP/volatility mean and their limits
- [Terms](https://instantotodata.com/terms) · [Privacy](https://instantotodata.com/privacy)

## Definitions

- **RTP (Return to Player)**: the theoretical long-run percentage of total wagers a slot returns, averaged over millions of spins. It does not predict any individual session; variance dominates real play. Many titles ship in multiple RTP configurations.
- **Volatility (variance)**: low = frequent small wins; high = rare larger wins.
- **House edge**: 100% − RTP; the theoretical long-run cost of play.

## Responsible gambling

Gambling can be addictive. 18+. Free, confidential support and self-assessment tools: https://get55ll.com