An ASIN finder is the workflow that takes a category, keyword, or brand and returns the matching product IDs with key attributes. Most sellers do this in a Chrome extension one product at a time. The faster path is a typed Amazon API that runs the lookup in batch. We ranked five.
Top Pick
Scavio handles bulk ASIN lookups across 12 marketplaces in one API. Cents per query, typed JSON, ready to drop into a CSV or a Notion database.
Full Ranking
#1Our Pick
Scavio
Bulk ASIN lookup and watchlists
Pros
- Bulk-ready
- 12 marketplaces
- Typed JSON
- Cents per query
Cons
- No Chrome UI
#2
Keepa
Price/rank history per ASIN
Pros
- Deep history
- Cheap
Cons
- Not built for bulk discovery
#3
Helium 10 Black Box
Filtered ASIN discovery in dashboard
Pros
- Filter UI
Cons
- Locked to Platinum
#4
Jungle Scout Product Database
Sellers who live in the dashboard
Pros
- Cleaner UI
Cons
- Smaller filters than Black Box
#5
AMZScout Pro
Affordable Chrome alternative
Pros
- Decent product DB
Cons
- Smaller dataset
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| Entry price | $30/mo | $19/mo | $49/mo |
| Bulk ASIN lookup | Yes | Yes (paid API) | Limited |
| Custom scoring | Yes | BYO | Filters only |
| 12 marketplaces | Yes | Yes | Yes |
| Watchlist monitoring | Daily script | Yes | Yes |
| Best for | Bulk + custom | Price history | UI filters |
Why Scavio Wins
- Bulk ASIN lookup is the wedge use case for FBA builders. A seller with a 500-ASIN watchlist exporting from Helium 10 spends 10 minutes navigating exports per refresh. The same lookup runs in 30 seconds via a Scavio script and costs about $1.50 in fast-tier credits.
- 12-marketplace coverage means the same ASIN script runs against UK, DE, JP, and others without subscribing to each marketplace. International watchlists become a parameter change instead of a new contract.
- Custom output shapes drop directly into Notion, Airtable, or DuckDB. Helium 10 and Jungle Scout export to CSV and force a manual import step. Scavio's typed JSON skips the import.
- Daily watchlist economy is honest. 500 ASINs daily uses about 15,000 credits per month at the fast tier — fits inside two stacked $30 plans, total $60/mo, still cheaper than Helium 10 Platinum at $99/mo and with more flexibility.
- The recommended stack: Scavio for bulk ASIN lookups and watchlists, Keepa $19/mo for the deep price-history view when you click into a single ASIN. Total $49/mo and you replace a $99/mo+ dashboard tier.