Notch Metrics: Use claude code to build analytics widgets for your notch

The service encrypts each provider key as soon as it is pasted, and the key remains on the server, where no app on the Mac can read it. It lists 16 sources, including Stripe, Polar, Paddle and Shopify, and a connection made on the web appears on every Mac on the account. Users can fit as many widgets as the notch allows, or switch to a list view. Competitors are working the same surface. Notch Buddy connects Stripe, Polar, Dodo Payments or Lemon Squeezy with a read-only key, and Notchy shows Claude Code, Codex, Cursor and Copilot rate limits, tokens, cost and pace in the notch, across 35+ providers. TrackNotch reads rate limits and context usage locally, with no proxies and no telemetry. For a team building an AI company, the notable feature is the custom metric path. Custom metrics can be authored by your own coding agent over MCP. That lets a founder define a widget around internal data instead of a fixed provider list. The server-held key design is also a reasonable benchmark for any internal finance tool that touches payment credentials.