AI memory layer

Your AI chat starts from zero every time. Blindspot doesn't.

Connect Blindspot to your favourite AI via MCP — every word you stumble on and every grammar mistake stays with you across chats, across models, across devices. Free, two-click setup.

Connect now See how it works

ChatGPT · Blindspot connected

Add "diligent" to my vocabulary with two example sentences

add_word(target: "diligent", examples: 2)

Saved to your vocabulary — confidence 1/10. Try using it this week.

What your AI can do once connected

You keep using the AI tool you already love. Blindspot becomes its memory for your English.

Save every new word

When you stumble on an unfamiliar word in chat, the AI looks it up, writes a proper card — meanings, collocations, synonyms, examples — and saves it to your topic.

Capture your mistakes

Every grammar mistake becomes a structured rule with your exact incorrect sentence, the fix, common pitfalls and tips — saved to your grammar profile.

Keep your streak

Practicing with the AI counts as a learning day. Your streak grows even when you never opened Blindspot directly.

How to connect

ChatGPT connects via OAuth — no manual token needed. You will be redirected to Blindspot to approve access, then back to ChatGPT.

  1. In ChatGPT, open Settings → Connectors → Add custom connector.
  2. Paste the MCP server URL below.
  3. Select Authentication: OAuth and follow the prompts. You will land on Blindspot's consent screen — review the access and approve.
  4. You're connected. Open a new chat and try: "Add the word diligent to my vocabulary".

MCP server URL

https://blindspot-be-production.up.railway.app/mcp

Requires a ChatGPT plan that supports custom connectors (Plus, Pro, Business, Enterprise).

Ready in 60 seconds

Sign in, generate your token (or connect ChatGPT via OAuth), and your AI's memory is on.

Start free

How this stacks up against other ways of learning English with AI

Three common approaches, side by side. Blindspot is the only one that pairs free conversational practice with persistent memory of your real mistakes.

Memory across chats and devices

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

Your real mistakes captured automatically

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

Free, open-ended conversational practice

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

Works in the tools you already use daily

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

Adapts to what you personally struggle with

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

Free to start, no subscription required

  • Blindspot + AI chat
  • AI chat on its own
  • Traditional language app

What your AI can read and write

Once connected, the AI can call these tools on your behalf. You stay in control — anything it does is visible in Blindspot.

Vocabulary

  • List your words by topic or search
  • Save a new word with full enrichment
  • Update meanings, examples or confidence
  • Delete a word

Topics

  • List your vocabulary topics
  • Create a new topic
  • Attach or detach a word
  • Delete a topic

Grammar

  • List your saved rules
  • Save a new rule with examples and tips
  • Update an existing rule
  • Delete a rule

Streak

  • Read your current streak
  • Mark today as a learning day

Frequently asked

1Why doesn't ChatGPT remember my vocabulary between chats?
ChatGPT spins up a fresh context for every conversation — it has no persistent memory of what you've learned before. Blindspot fills that gap: every word and grammar mistake the AI catches in a chat is saved to your personal Blindspot account, ready next time you open ChatGPT (or even switch to Claude or Cursor).
2How is Blindspot different from ChatGPT-5 Study Mode and Claude Learning Mode?
Study Mode and Learning Mode are excellent teaching styles, but they don't carry your progress across sessions or between models. Blindspot is the persistent memory layer that works alongside them: keep using Study Mode for active practice, and Blindspot quietly maintains your dictionary and grammar profile underneath.
3What is MCP and why should language learners care?
MCP (Model Context Protocol) is the open standard that lets AI tools like ChatGPT, Claude and Cursor talk to external services like Blindspot. It's the reason you can connect once and have your data work everywhere — without writing a separate integration for each AI app.
4Can ChatGPT really replace Duolingo for learning English?
ChatGPT is far more flexible than Duolingo's pre-built lessons — it can roleplay, explain any mistake, write practice texts at your level. What it's missing is the persistent dictionary and habit tracking Duolingo provides. Blindspot adds exactly that, so ChatGPT becomes both your tutor and your textbook.
5Will my vocabulary sync between ChatGPT, Claude and Cursor?
Yes. All of them write into the same Blindspot account. Add a word in ChatGPT today, list it from Claude tomorrow, review it from Cursor next week — it's the same dictionary everywhere.
6Does Blindspot read my conversations with the AI?
No. We only see what the AI explicitly sends to our tools — for example, the word it asks us to save. Your chat messages, prompts and AI responses never reach our servers.
7Is it free?
Yes. The MCP connection itself is free on Blindspot's side. Your AI of choice may have its own subscription (ChatGPT Plus is required for custom connectors; Claude Desktop is free).

Ready to make your AI remember your English?

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