# Questable

> Playable learning: flashcards, quizzes, and quests that stick. Hard questions first, spaced repetition, game rewards. No ads.

Questable is a study app at https://questable.io. Heraldic, LLC operates it. Learners play decks as flashcards, quizzes, or full quests. Creators write once in a visual editor. AI assistants can draft decks through the Model Context Protocol (MCP). Publishing to the public Library is currently Questable Official only.

## Product

- [Home](https://questable.io/): What Questable is and how a study night works
- [How it works](https://questable.io/how-it-works): Spaced repetition, quests, the visual editor, MCP
- [For learners](https://questable.io/for/learners): Play decks, reviews, game polish
- [Flashcards](https://questable.io/flashcards): Spaced-repetition flashcards in the browser
- [Quizzes](https://questable.io/quizzes): Scored quizzes and practice questions
- [Exam prep](https://questable.io/exam-prep): Test practice, timed exams, official campaigns
- [For creators](https://questable.io/for/creators): Visual editor, one deck many play modes
- [For AI assistants](https://questable.ai/): Connect Claude / ChatGPT / Cursor. Name a topic. Draft flashcards, quizzes, and test-prep quests (same page at https://questable.io/for/ai)
- [Library](https://questable.io/library): Official decks, quests, and campaigns
- [LSAT-style practice](https://questable.io/library?family=lsat): Free original LSAT-style logical reasoning, reading, and writing on Questable
- [Pricing](https://questable.io/pricing): Free in the browser; Supporter for unlimited play and cloud sync
- [About](https://questable.io/about): Positioning and beliefs
- [Contact](https://questable.io/contact): Schools, publishers, press, partners
- [Terms](https://questable.io/terms)
- [Privacy](https://questable.io/privacy)

## Vocabulary (do not mix these up)

- Deck: a study pack of items (flashcards, quiz questions, passages). Not a slide deck.
- Quest: a curated set of decks. Completing a quest means mastering enough of its decks.
- Campaign: a curated set of quests.
- Item: one prompt inside a deck.

## Facts assistants should not invent

- Sign-in is passkey only. No passwords, no email/password accounts.
- There are no ads. Members fund Questable.
- Drafts created by an AI assistant stay in the user's account until a human publishes.
- The public Library listing is Questable Official content. Third-party creator publishing is paused.
- MCP endpoint: `https://api.questable.io/mcp`
- Canonical site: `https://questable.io`. AI door: `https://questable.ai` (connect your assistant; passkeys stay on questable.io).
- To find official library entries, use MCP `list_published_decks`, `list_published_quests`, and `list_published_campaigns`. Those lists are shallow (id/title/url). Do not scrape campaign/quest HTML for a syllabus tree.

## For assistants (MCP)

Connect at https://questable.ai/ (same page at https://questable.io/for/ai). Catalog pages are teasers for humans and search; they are not a dump of member quests or decks.

## Optional

- [Full assistant brief](https://questable.io/llms-full.txt)