Nightspar for ChatGPT

com.nightspar/nightspar

Save words from your AI chats as spaced-repetition flashcards, with meanings, IPA and audio.

client:ChatGPT transport:streamable-http

Install Nightspar in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.nightspar.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs