Nightspar
MCP server that saves words from your AI chats as spaced-repetition flashcards
Nightspar
MCP server that saves words from your AI chats as spaced-repetition flashcards
nightspar.com
Nightspar is a vocabulary app with a built-in MCP server. Connect Claude, ChatGPT, Cursor, VS Code or Claude Code once, and the assistant you already chat with can save words into your library mid-conversation, a single word or several at once, and read back what you have saved.
Ask what a word in a sentence means, then say "add it to Nightspar". The phrase is saved with the context from that conversation and gets a full AI-built flashcard: meanings, translation, pronunciation, examples and audio. Reviews are scheduled with FSRS, the algorithm Anki uses.
Sign-in happens in a browser window, with no keys or tokens to paste. 34 languages, free during the beta.
Pricing & access
Nightspar is free to use. Free during the beta. Check nightspar.com for current plans.
Frequently asked questions
What is Nightspar?
Nightspar is mCP server that saves words from your AI chats as spaced-repetition flashcards. Nightspar is a vocabulary app with a built-in MCP server. Connect Claude, ChatGPT, Cursor, VS Code or Claude Code once, and the assistant you already chat with can save words into your library mid-conversation, a single word or several at once, and read back what you have saved. Ask what a word in a sentence means, then say "add it to Nightspar". The phrase is saved with the context from that conversation and gets a full AI-built flashcard: meanings, translation, pronunciation, examples and audio. Reviews are scheduled with FSRS, the algorithm Anki uses. Sign-in happens in a browser window, with no keys or tokens to paste. 34 languages, free during the beta.
Is Nightspar free?
Nightspar is free to use. Free during the beta.
What are the best Nightspar alternatives?
People comparing Nightspar also look at Backlane, Bot403, Cypher eSIM, Kresmion. See all options in the Developer Tools category on SiftFox.
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