Supplier catalog screening for Amazon EU sellers

Upload a supplier XLSX file. Catalogr matches EAN, UPC and GTIN barcodes to Amazon ASINs, checks sales rank, Buy Box and offer data, estimates Amazon referral and FBA fees, and exports CSV shortlists for manual sourcing review.

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What Catalogr does

Detects barcode and supplier price columns in supplier XLSX files
Normalizes EAN, UPC and GTIN values into GTIN-14
Matches supplier barcodes to Amazon ASINs using Amazon SP-API Catalog Items
Retrieves sales rank, product dimensions and package weight when available
Checks Buy Box, offer counts and FBA/FBM price signals using Product Pricing
Estimates referral fees, FBA fees, profit and ROI
Scores products with grade, risk level, warnings and review decisions
Exports light and full CSV files for sourcing review

Outputs

opportunities.csv - light CSV shortlist of qualified products for manual review
opportunities_full.csv - full audit export with rank, Buy Box, pricing, dimensions, FBA fee and scoring fields
rejected.csv - rejected products with reject stage and reason
mapped.csv - GTIN to ASIN matches
unmapped.csv - rows where no ASIN was found

Built for screening, not automatic buying

Catalogr helps sellers reduce large supplier files into a smaller list of products worth reviewing. It does not guarantee profit, estimate exact sales volume, or make automatic buying decisions.

Data sources

Amazon SP-API Catalog Items for ASIN matching, sales rank and dimensions
Amazon SP-API Product Pricing for Buy Box and offer data
User-uploaded supplier XLSX files

Catalogr does not access buyer personal information, seller orders, advertising data, inventory data or Brand Analytics data.

Security and data

Passwordless login by magic link
Rate limiting and upload safety checks
Per-job outputs stored in isolated directories
No uploaded supplier file is shared across users
No scraping and no third-party resold catalog data