Chrome ExtensionGet data directlyfrom Amazon.
Get Buy Box price, FBA fees, product dimensions, seller count and category restrictions directly from Amazon via SP-API integration. Enrich Keepa data with SP-API for 99% accuracy.
Free Amazon API · No extra cost
Why SP-API matters.
Third-party data sources aren't always accurate — Amazon's own data is the most reliable.
Price accuracy issues
Keepa and similar tools provide ~90% accuracy. Buy Box price often differs. SP-API gives 99% accuracy.
FBA fees unknown
Can't calculate profit accurately without knowing FBA referral, fulfillment and storage fees.
Restricted categories
You need to know if there are selling restrictions before investing in a gated category product.
Amazon's own data.
Buy Box price
Real-time Buy Box price directly from Amazon. More accurate than Keepa.
FBA fee calculation
Referral fee, fulfillment fee, storage fee — real numbers directly from Amazon.
Product dimensions
Package size, weight — FBA size tier calculation and shipping cost estimation.
Seller count
How many new/used sellers — critical data for competition analysis.
Restriction check
Automatically detect gated/restricted products. Know before you invest.
Keepa + SP-API combined
365-day price history (Keepa) + real-time Buy Box & fees (SP-API). Best combo.
How it works?
Create app in Seller Central
Create a new app with Self-Authorization in the Develop Apps section.
Get credentials
Client ID, Client Secret and Refresh Token — 3 pieces of info is enough.
Enter SP-API settings
Enter credentials in the SP-API Settings page in niche.ltd panel. Connection is tested.
Frequently Asked Questions
Start with 99% accurate data.
Amazon SP-API is free, setup takes 5 minutes. Keepa + SP-API = most accurate data.
Free Amazon API · No extra cost