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post/barcode/v1/by_prefix1 credit

GS1 company-prefix (partial-barcode) search → products whose barcode starts with the given 6+ digits, plus the decoded issuing country. (Competitor: `491234*` partial method.)

Working example
Parameters

A GS1 company prefix — the first 6+ digits of a barcode (the competitor's `491234*` partial-barcode method). Returns products whose barcode starts with these digits + the decoded issuing country.

Which Open-*-Facts sibling DB to search/lookup against when source=off. lookup auto-falls-back food→products when source=auto.

1-based page number (clamped 1-1000). Page forward with meta.next_page. Note: Open Food Facts throttles deep pages per-IP; the engine retries on a fresh proxy. (1–1000)

Results per page (1-50, default 20); out-of-range values are clamped. (1–50)

request preview
curl -X POST https://api.reefapi.com/barcode/v1/by_prefix \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"prefix":"5449000"}'

Hit Send to run this endpoint live.