The Visual Novel Database vs YGOPRODeck

The Visual Novel Database (VNDB) is a free resource for information about visual novels and eroge, available on the web and through an API. Its wiki lets people add and contribute information, including general details and practical coverage of releases, localisations and producers. Registered users can vote on visual novels and maintain lists of games they want to play or have finished. VNDB also aims to introduce visual novels to a broader audience across geographic and cultural differences. The Kana HTTPS API can query the database and manage user lists. Non-commercial API access costs nothing and is subject to limits: 200 requests per 5 minutes, one second of execution time per minute, and automatic abortion of requests exceeding three seconds. API availability is best-effort, with no guarantees about stability or applicability. It does not provide some site functions, including forums, database editing and account creation. Users can obtain API tokens from the Applications tab in My Profile, and a sandbox endpoint at beta.vndb.org/api/kana is available for testing and development. VNDB's first version went live in September 2007.

YGOPRODeck is a Yu-Gi-Oh! TCG community site with a card database, deck tools, and a public API. The database supports advanced searches using fields, ranges, and boolean operators. Its deck tool lets users edit and share decks and view prices; submitting a created deck requires a login. Tournament and meta decks are organized by categories including format and archetype. The site also lists a card pack simulator, cube drafting, a Master Duel arena, forums, and tournament breakdowns. The free API returns card, card-set, archetype, random-card, and database-version data as JSON, and supports TCG, OCG, Speed Duel, Rush Duel, and GOAT. It allows 20 requests per second; exceeding that rate blocks access for one hour. The API guide asks users to download and store retrieved data locally to limit requests, and warns that not doing so may lead to IP blacklisting or API rollback. YGOPRODeck is freemium, with paid plans from €4.99/mo, and is available on the web and through its API. The privacy policy describes CCPA and GDPR data rights and says requests receive a response within one month.