ERESA AI｜Amazonリサーチ・分析ツールの決定版｜10か国・50億件超のデータ対応

Search Amazon products

Search Amazon products by keyword on a chosen marketplace. Returns ASIN, title, current Amazon/New price, sales rank, rating, and review count. Keepa cost: ~5 tokens per call.

Get Amazon product details

Fetch detailed information for an Amazon product by ASIN, including pricing, sales rank, category, FBA fees, rating, and review count. Keepa cost: ~1-3 tokens (cached responses are free).

Estimate Amazon sales volume

Estimate weekly and monthly sales volume for an Amazon product (Japan-focused). Uses category-aware ranking-to-sales interpolation. Keepa cost: ~1-3 tokens.

Look up ASIN from JAN/EAN/UPC

Resolve a JAN / EAN-13 / UPC barcode (8-13 digits) to its Amazon ASIN on a given marketplace. Keepa cost: ~1 token (cached for 24h).

Look up Amazon seller profile

Fetch an Amazon seller's profile by Seller ID (the `A...` identifier in storefront URLs). Returns seller name, rating, rating count, country, and ship-from-China flag. Note: Keepa does not expose a public seller-name search; pass the Seller ID directly. Keepa cost: ~1 token (cached for 60 minutes).

Search Amazon keyword volumes (SellerSprite)

Look up Amazon keyword volume / competition data via SellerSprite. Returns top-N keywords sorted by search volume. Costs SellerSprite credits per call; results capped at 30.

List my ERESA favorites

List the signed-in ERESA user's favorite Amazon products. Filter by tag/folder and limit the page size. Requires OAuth sign-in.

Add product to my ERESA favorites

Add an Amazon product (by ASIN) to the signed-in user's favorites. Title is fetched from Keepa if not provided. Requires OAuth sign-in.

Remove product from my ERESA favorites

Remove an ASIN from the signed-in user's favorites. Requires OAuth sign-in.

List my ERESA view history

Return the signed-in user's recently viewed Amazon products in ERESA. Requires OAuth sign-in.

Run ERESA AI 仕入れ判断 analysis

Run ERESA's AI 仕入れ判断 (purchasing-decision) analysis on an ASIN using the same Mastra workflow as the website. Returns price/sales/competition insights plus an AI-generated recommendation. Requires OAuth sign-in; consumes Keepa + Gemini tokens.

Get Amazon price history summary

Returns a 30-day or 90-day price-history summary for an ASIN, including min/max/avg/latest for Amazon, New, and Used series, plus downsampled data points (≤30 per series) to keep responses small. Keepa cost: ~1-3 tokens.

Search Rakuten Ichiba (楽天市場) products

Search Rakuten Ichiba (楽天市場, Japan) product listings by keyword or JAN/EAN barcode. Returns title, price (JPY), shop name, image, item code, and product URL. Japan marketplace only.

Search Yahoo! Shopping (Yahoo!ショッピング) products

Search Yahoo! Shopping (Yahoo!ショッピング, Japan) product listings by keyword or JAN/EAN barcode. Returns title, price (JPY), store name, image, item code, and product URL. Japan marketplace only.

AI cross-market supplier search (AI横断検索)

Find where to buy or source a product across major Japanese marketplaces (メルカリ, ヤフオク, 楽天, Amazon, Yahoo!ショッピング, ラクマ) using ERESA's AI横断検索 (Google search + Gemini summary). Returns an AI summary of the best in-stock suppliers plus the underlying source links with price/availability when available. Best for Japanese product names. Consumes Google + Gemini quota.