The heavy listing is ours
The time is yours
Heavy Lister
Enterprise-level tools, in the hands of small business owners and serious hobbyists.
Heavy Lister is an inventory listing and sync app. It holds one canonical record for each part and keeps it in step across the marketplaces you sell on — so a change to a price, a quantity or a photograph happens once, not once per platform.
- Field schema
- 1,160marketplace categories mapped field by field, by hand.
- In service
- Since 2024Running continuously in a working parts operation.
- Built for
- Small operationsSmall business owners and serious hobbyists — not enterprises.
What it does
Selling the same part on more than one marketplace means keeping the same information in more than one place, in a different shape each time. Every platform asks for its own fields, in its own categories, under its own names — and the fields that matter change from one category to the next.
Heavy Lister keeps one canonical record for the part and treats each marketplace as a projection of it. The category schemas are mapped rather than guessed: which fields a listing requires, which are optional, and which mean the same thing under different names.
Tools that do this properly have existed for a long time. They have generally been priced and built for operations with staff to run them.
Heavy Lister was built inside a working parts business, for the listings that business actually had to publish — by one person, at the scale one person can carry.