Terms of Service
Effective August 15, 2026 · Plain language on purpose
What Offerbook is
Offerbook is a market-information tool for Old School RuneScape's Grand Exchange. It shows prices, margins, and estimates derived from publicly crowdsourced data and, if you connect the RuneLite plugin, from your own trade activity. It is decision support only: Offerbook never automates gameplay, never interacts with the game on your behalf, and never touches your RuneScape account or credentials.
No guarantees about numbers
Prices are observations of real trades, not quotes, and can be stale, thin, or manipulated at the source. Estimates (margins, gp/hr, fill times) are exactly that — estimates. You trade at your own risk; Offerbook accepts no liability for in-game losses. All values are denominated in gp; nothing on Offerbook has or implies a real-world monetary value.
Your account
You're responsible for what happens under your account and for keeping your sign-in method secure. You must be at least 16 to create an account. One account per person; don't share tokens. We may suspend accounts that abuse the service — including submitting fabricated trade telemetry, scraping at disruptive volume, or attempting to manipulate the data other users see.
The RuneLite plugin
The Offerbook Sync plugin is read-only, open-source, and sends only your own Grand Exchange offer events. Connecting it is optional and revocable at any time from your account page.
Fair dealing
Don't resell, redistribute, or bulk-scrape Offerbook's data or interfere with the service. Personal use, screenshots, and sharing links are always fine — that's what it's for.
Affiliation
Offerbook is not affiliated with or endorsed by Jagex Ltd. Old School RuneScape and RuneScape are trademarks of Jagex Ltd. Price data originates from the OSRS Wiki real-time prices API (a RuneLite × WeirdGloop collaboration), credited with thanks.
Changes
We may update these terms as the product evolves; material changes will be noted on this page with a new effective date. Questions: contact@offerbook.gg.