Would you give an AI your inbox, your bank statements and your lab results? Only if none of it ever leaves your machine.
I'm a product guy in Berlin, and I build exactly that: local-first tools that let Claude work with your real data: mail, messages, money, health, training.
5 MCP servers · 96 tools in the biggest one · ~10k npm downloads a month · everything runs on your machine
duo: see every agent Claude spawns, live. Illustrative plan.
| Project | What it does | Get it |
|---|---|---|
| proton-mail-bridge-client | Proton Mail for Claude via Proton Bridge. Up to 96 MCP tools plus a CLI. Read, search, draft, send, with read-only and send-to-self modes. | npm i -g proton-mail-bridge-client |
| finance-assistant | Personal finance copilot for Claude Code. Bank imports, country-specific tax rules, scenario modelling. 1,100+ test functions. | see README |
| signal-mcp | Signal for Claude via signal-cli, with local history and full-text search. 79 MCP tools. | pipx install signal-mcp |
| suunto-mcp | Ask Claude about your Suunto workouts, sleep and recovery, and push workouts back to the watch. 24 MCP tools. | npx -y suunto-mcp |
| duo | Claude Code plugin that shows every agent Claude spawns: task, model, effort, steps, tokens, usage limit. Fork of JohnnyVizz's claude-kit. | /plugin marketplace add googlarz/duo |
- proton-mail-bridge-client v2.19.0 — Local-first Proton Mail MCP server and CLI via Proton Bridge. Search, draft, send and organize ma... · 2026-11-05
- proton-drive-mcp v1.8.0 — MCP server and CLI that gives Claude full access to Proton Drive — upload, download, share, and m... · 2026-11-01
- finance-assistant v4.2.3 — Personal finance copilot — real math, not AI guesses. 6 locales · 13 bank formats · Monte Carlo F... · 2026-10-30
- finance-assistant-locales v2.6.0 — Locale plugins for Finance Assistant — country-specific tax rules, social contributions, filing d... · 2026-10-30
- suunto-mcp v0.21.0 — MCP server that connects your Suunto watch data to Claude and other AI assistants · 2026-10-29
- signal-mcp v1.43.3 — Signal for AI assistants: an MCP server + CLI with searchable local message history, groups, poll... · 2026-10-21
- Personal skills for Claude: health-skill · suunto-gym · fashion-skill · personal-inbox
- Skills for working with Claude Code: duo · delegate · vibe-safe · logic-audit · deep-context · context-handoff · agents-sync
- Other MCP servers: proton-drive-mcp · vinted-mcp-cli
- Private by default: local storage, no telemetry, read-only modes where possible.
- Built for my own use first, then released once it holds up.
- Honest about limits: finance and health tools are assistants, not licensed advice.