You already have the list: a textbook chapter, a teacher’s handout, the lyrics of a song. Connect Claude to Grabster, paste the list into a chat and ask for a deck. Grabster makes the flashcards on your Mac, and spaced repetition and fill-the-gap practice bring the words back until they stay. Claude is the assistant shown here; any assistant that can add a connector by address, such as ChatGPT, Gemini or DeepSeek, uses the same one.
Needs Grabster on your Mac
and a Claude plan, or another assistant with connectors
Connector address: https://broker.grabster.app/mcp
In Grabster, open Settings ▸ Assistants and press Connect an assistant. Grabster shows the connector address and an eight-character code.
In Claude, add a custom connector with the address https://broker.grabster.app/mcp. Claude then asks you to sign in, and opens a Grabster page that asks for the code. In ChatGPT, Gemini or DeepSeek, add a connector with the same address wherever that assistant takes one; the sign-in and the code work the same way.
Type the code from Grabster’s Settings. It is valid for ten minutes and works once; if it runs out, press Get a new code. Settings then says Connected.
WHAT CLAUDE CAN DO
Reads your native language, the languages you’re learning, the decks you made from earlier lists, how many new words your plan has left this month, and the import limits. Never your vocabulary.
Try: “Which languages am I learning in Grabster, and how many new words do I have left this month?”
Makes a deck from a list of words in one language, or adds words to a deck made earlier: the same name and language adds to it. Every new word gets flashcards.
Try: “Here is chapter 3 of my Dutch book. Make a Grabster deck called Hoofdstuk 3, with English translations.”
Before a tool runs, Claude asks whether to allow it, and shows what it is about to send: the deck name, its language and the words. Nothing reaches Grabster until you allow it. Grabster doesn’t ask again or pop up; Claude’s reply says how it went, and the deck is under Custom in Decks.
GOOD TO KNOW
Claude’s call goes through our server to Grabster on your Mac, and the deck is made there. If your Mac is asleep or Grabster is closed, the call fails with a message telling you to open Grabster and try again. Nothing is queued for later.
A word Claude gives a translation for gets its cards at once. A word without one is translated by Grabster, as a word you grab is, over the next days. On the free plan, every new word from a list counts toward the month’s allowance like a word you grab; words over it wait, and Claude’s reply says how many.
Settings ▸ Assistants ▸ Disconnect ends it: every paired assistant loses access, and pairing again takes a new code. If no assistant calls Grabster for 28 days, the connection turns itself off.
A Mac running Grabster, and an assistant that can add a connector by address: Claude on the web, desktop or phone, or another assistant such as ChatGPT, Gemini or DeepSeek, which connect the same way.
Up to 500 words in one call, and up to 1,000 new words an hour on one Mac. Each entry is one word or a short expression of up to four words, in its dictionary form. A longer list takes more than one call.
Grabster says no until you agree to add the language to Grabster. Then Claude can ask again with the language added, and you approve that call like any other.
They join the new deck as they are, with their meaning and your progress untouched. A word already in that deck is left alone, so asking twice does no harm.
No. Claude can read your profile and add words; it cannot delete, edit or list your vocabulary. You delete words in Grabster.
While an assistant is connected, Grabster keeps checking with our server, so it can tell when your Mac is online. The list Claude sends and Grabster's answer pass through that server readable, on their way between your Mac and Claude, and are not stored. Grabster tells Claude only your languages, the decks made from earlier lists, your plan and what it has left this month, and what happened to each word Claude sent, never the rest of your words, your cards or your review history. The connection uses its own random key, made when you press Connect and thrown away when you disconnect. The privacy policy has the full list.
“The list you already have is a deck waiting to happen.”
macOS 14 or later · Apple Silicon and Intel
Grabster