mathem-cli

Search Mathem products and prepare a grocery cart from the terminal. Results are structured JSON, including ingredients, allergens, nutrition, origin, availability, and pricing when Mathem provides them.

[!NOTE] This unofficial project uses Mathem's private web endpoints, which can change without notice. It prepares and verifies the cart; checkout, payment, and delivery remain manual.

Install for agents

Install the bundled skill globally:

npx skills add onmax/mathem-cli --global --skill mathem-cli --yes

The skill teaches compatible coding agents to install and use the CLI, compare products, and prepare a verified cart.

Use

Requires Node.js 24+, Google Chrome, and a Mathem account.

npx --yes mathem-cli login
npx --yes mathem-cli search "grekisk yoghurt" --limit 3
npx --yes mathem-cli product 8279
npx --yes mathem-cli add 8279
npx --yes mathem-cli list
npx --yes mathem-cli update 2 8279
npx --yes mathem-cli delete 8279

login opens Chrome so you can authenticate; the CLI never asks for your password. Search and cart commands write JSON to stdout, and every mutation returns the updated cart. Product IDs are preferred, but update and delete also accept a unique name fragment.

[!CAUTION] Login stores authenticated cookies in ~/.mathem-cli/session.json. Never share or commit that file; delete it and sign out from Mathem to revoke access.

Development

vp install
vp check
vp pack
vp test run