Credits
Built on other people's good work.
Every data source, its license and how it's credited. Share-alike and short-lived data is handled exactly as its terms ask; nothing here is endorsed by the projects listed.
Heroes of the Storm
- Blizzard Entertainment Blizzard fan-site terms (non-commercial) Open: Open or our own derivation; published in the public data branch.
Patch notes and game content © Blizzard Entertainment, Inc.
- Credit
- Credited in the footer of its game pages
- Terms
- Personal, non-commercial, revocable fan-site license; copyright and trademark notices required. We store no sentences from the patch notes: each change is kept as our own structured summary (what changed, old and new numbers, buff or nerf, or the kind of change), and every patch links to the original notes.
- Blizzard version server Open: Open or our own derivation; published in the public data branch.
Live and PTR build numbers from the Blizzard version server.
- Credit
- Credited in the footer of its game pages
- Terms
- Public build metadata only; used to detect new patches and hotfixes.
- HeroesToolChest heroes-data2 MIT Open: Open or our own derivation; published in the public data branch.
Hero, ability, talent and map data extracted by HeroesToolChest heroes-data2 (MIT).
Copyright (c) 2026 Kevin Oliva. Used under the MIT License.
- Credit
- Credited in the footer of its game pages
- Terms
- MIT covers the extraction and packaging; the underlying game data is © Blizzard Entertainment.
- HeroesToolChest heroes-images MIT (artwork © Blizzard Entertainment) Open: Open or our own derivation; published in the public data branch.
Portraits and icons via HeroesToolChest heroes-images (MIT); artwork © Blizzard Entertainment.
Copyright (c) 2019 - 2026 Kevin Oliva. Used under the MIT License.
- Credit
- Credited in the footer of its game pages
- Terms
- A pinned subset of portraits, icons and map images is converted to WebP and self-hosted with this credit.
- Liquipedia CC-BY-SA 3.0 Share-alike: Share-alike; published in separate files under the same license.
Pro draft data from Liquipedia, licensed CC-BY-SA 3.0
- Credit
- Credited next to the data it supports
- Terms
- Share-alike: derived pro-draft files are published separately under CC-BY-SA 3.0. Fetched through the MediaWiki API only (custom User-Agent, 2 s spacing).
- Nexus Compendium Open: Open or our own derivation; published in the public data branch.
Free hero rotation and ranked season dates courtesy of Nexus Compendium.
- Credit
- Credited in the footer of its game pages
- Terms
- No published terms; used for the rotation and season only, with attribution.
- YouTube YouTube API Services Terms Ephemeral: Short-lived metadata; never stored, hidden once out of date.
Video guide details from YouTube.
- Credit
- Credited next to the data it supports
- Terms
- Optional (needs an API key). Ephemeral: never committed, refreshed or dropped within 30 days.
- Twitch Ephemeral: Short-lived metadata; never stored, hidden once out of date.
Live data from Twitch.
- Credit
- Credited next to the data it supports
- Terms
- Not used: Whetstone fetches no Twitch data and holds no Twitch credentials. The live page links to the Heroes of the Storm category and loads a featured channel’s player only when you click it.
MTG Arena
- Scryfall Scryfall API terms Open: Open or our own derivation; published in the public data branch.
Card data and images courtesy of Scryfall
- Credit
- Credited in the footer of its game pages
- Terms
- Free for Magic software: no paywall, no plain repackaging; images unaltered with artist credit. Bulk data feeds a trimmed in-app index that is not offered as a dataset.
- 17Lands CC BY 4.0 Open: Open or our own derivation; published in the public data branch.
Limited ratings derived from 17Lands public datasets, licensed CC BY 4.0
- Credit
- Credited at the top of every page that uses it
- Terms
- Public datasets only (no API scraping); credited at the top of every Limited page.
- Whetstone curated meta Open: Open or our own derivation; published in the public data branch.
Constructed meta lists hand-curated by Whetstone contributors, each linked to its original source.
- Credit
- Credited in the footer of its game pages
- Terms
- Curated by hand from public results; no automated collection from sites that forbid it.
- grindstone-mcp MIT Open: Open or our own derivation; published in the public data branch.
Deck analysis engine from grindstone-mcp (MIT).
Copyright (c) 2026 Troy. Used under the MIT License.
- Credit
- Credited in the footer of its game pages
Pokémon Champions
- Pokémon Showdown MIT Open: Open or our own derivation; published in the public data branch.
Pokédex, learnsets and mechanics data from Pokémon Showdown (MIT).
Copyright (c) 2011-2026 Guangcong Luo and other contributors. Used under the MIT License.
- Credit
- Credited in the footer of its game pages
- Smogon usage stats Open: Open or our own derivation; published in the public data branch.
Ladder usage statistics from Smogon.
- Credit
- Credited in the footer of its game pages
- Terms
- Monthly aggregates, attributed; Smogon sets and analyses are linked, never copied.
- Limitless Public API Open: Open or our own derivation; published in the public data branch.
Tournament results via the Limitless API (play.limitlesstcg.com); player names removed.
- Credit
- Credited in the footer of its game pages
- Terms
- Throttled below 50 requests per 5 minutes; only aggregates and anonymized teams are published.
- Pokémon Showdown replays Open: Open or our own derivation; published in the public data branch.
Head-to-head results aggregated from public Pokémon Showdown replays; player names removed.
- Credit
- Credited in the footer of its game pages
- Terms
- Public replay API, throttled; only aggregates are published.
- Pokémon Showdown sprites Open: Open or our own derivation; published in the public data branch.
Sprites: Pokémon Showdown gen5 sprite set (Smogon sprite project); Pokémon images © Nintendo, Creatures and GAME FREAK.
- Credit
- Credited in the footer of its game pages
- Terms
- Self-hosted WebP copies of the legal roster only, re-fetched when the roster changes; never hotlinked.
- @smogon/calc MIT Open: Open or our own derivation; published in the public data branch.
Damage calculations by @smogon/calc (MIT).
Copyright (c) 2013-2025 Honko and other contributors. Used under the MIT License.
- Credit
- Credited in the footer of its game pages
Software and artwork
- Astro MIT
Static site generator
- Preact MIT
Interactive islands
- Zod MIT
Data validation
- Workbox MIT
Offline support
- Whetstone icons and artwork
Original. Game names, logos and artwork belong to their owners and are used for identification only; see the notices in the footer. Source code: github.com/JollyKrampus/whetstone.
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The full licence text and copyright notice of every open-source package bundled into this site's scripts, Web Workers and service worker, generated with each build.