Browser-only AI chat. Paste any API key — Anthropic, OpenRouter, Groq, Together, or any OpenAI-compatible endpoint — and the model picker fills itself. Chats, attachments, and remembered facts all live in IndexedDB on the device. Nothing on a server.
Buying API access shouldn't mean handing your data to a third-party chat wrapper or paying $20/month for a UI someone else owns. I wanted a clean place to talk to whatever model I was paying for, with my own memory, no backend, no subscription.
So:
- One key, any model. Paste, auto-detect, chat.
- Yours alone. No server. Browser → provider, that's the only network hop. Clear browser data and Pocket forgets you.
- Memory that sticks. The assistant ends turns with
MEMORIZE: …lines. Pocket harvests them silently into a local fact store, recalls top-matching ones on every new turn. - Token-aware. Sliding window with summary compaction. Optional heuristic prompt compression. Anthropic prompt caching on by default.
Works as a standalone chat app. Also designed to pair with zhub — paste a zk_ URL+key and Pocket talks to your own AI living on a $5 VPS instead of a hosted provider. Same surface either way.
A clean chat. Direct, no preamble, no "sure, here's…" filler. Memory carries between sessions on the same device. Switching models mid-conversation keeps the thread.
| Provider | CORS | Notes |
|---|---|---|
| Anthropic | ✅ | Native vision + PDF. dangerous-direct-browser-access header is set. |
| OpenRouter | ✅ | One key, 200+ models including OpenAI / Gemini / Llama. |
| Groq | ✅ | Fast Llama / Mixtral. |
| Together AI | ✅ | Open weights catalog. |
| OpenAI direct | ❌ | Browser CORS blocked. Use OpenRouter for GPT-5 / 4o / o1. |
zhub (zk_ keys) |
✅ | Auto-detected. Talks to your own AI on a hub via OpenAI-compat. |
| Custom (OpenAI-compat) | ⚠ | Any base URL — local llama.cpp, vLLM, xAI shim. CORS depends on the server. |
Paste a key, the provider is auto-detected from the prefix, the model picker fills with that provider's catalog. Models from different providers can be switched mid-conversation; memory and threads survive the switch.
The default system prompt instructs the model to end any turn worth remembering with MEMORIZE: <fact> lines. Pocket:
- Strips those lines from the user-visible reply.
- Stores each fact with simple keyword tags.
- On the next user message, recalls the top 8 facts whose tags overlap and prepends them to the system prompt.
You can browse, search, and delete facts in Settings → Memory. They never leave your device.
Cross-session recall is a separate, opt-in layer: when you message any model, Pocket scans every chat in this browser for relevant snippets and includes them as context. So whichever provider/model you switch to, it walks in knowing what you've talked about before.
Three layers, top to bottom:
- Sliding window — keep the last N turns full (default 16); compact older turns into a single summary block.
- System-prompt cache (Anthropic) —
cache_control: ephemeralcuts cost on repeated context by ~90%. - Heuristic compression (off by default) — strips filler words and applies abbreviations to user prompts. Lossy, opt-in.
Live token estimate is shown under each assistant reply.
Pocket carries itself a certain way across every model you plug in — direct, no preamble, no closers, willing to say "I don't know," matches your cadence (English / Hinglish / whatever). That posture lives in a single editable system prompt, sent first on every turn before recalled memory.
Edit it to taste. Reset to default any time.
- API keys stored in IndexedDB. Optional encryption at rest (PBKDF2 + AES-GCM, prompts for passphrase per browser session).
- No telemetry. The only outbound HTTP from Pocket is to the provider you configured.
vercel.jsonships strict headers (X-Frame-Options: DENY,Referrer-Policy: no-referrer).- Clearing browser data wipes everything Pocket knows.
Whatever the provider charges. Pocket adds nothing.
That's my provider console after a real testing session: my own key, my own bill, no subscription, no SaaS markup. Three cents for six conversations on a flagship reasoning model.
npm install
npm run dev # vite at http://localhost:5173
npm run build # static bundle in dist/Pocket is a static SPA. Anywhere static works:
- Vercel —
vercel(zero config;vercel.jsonalready in repo) - GitHub Pages — push
dist/togh-pagesbranch, or use the included Actions workflow - Any static host (Cloudflare Pages, Netlify, S3 + CloudFront, your own nginx)
Vite + React + TypeScript. Tailwind for styling. Dexie (IndexedDB) for local storage. No bundler-side proxy, no Node server, no backend at all — every API call goes browser → provider directly.
Personal use.