Stable signalNo paid features detectedMedium-risk permissions

キーゾンv3

キーパの月間販売個数を表示する拡張ツール。

Users40KCurrent public install base

Rating4.0Store average score

Reviews3Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

キーゾンv3 Media preview

1 assets

Trend

User growth trend

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User Growth Over Time

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7-day rating trend

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7-day rating change

Start

4.00

Latest

4.00

7-day rating change

0.00

2026年7月13日2026年7月19日

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1-day growthFlat

00%

7-day growthFlat

00%

30-day growthFlat

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Technical snapshot

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Version3.0.1

ManifestV3

Size45.82KiB

Languages1日本語

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

キーパの月間販売個数を表示する拡張ツールです。

月間販売個数を把握することにより、仕入れ判断の効率化や、何個仕入れるかの詳細判断に役立ちます。

【機能概要】

●ランキングの上昇・下落を計算し、月間販売個数を算出

●JAN、型番、カテゴリ、発売日、バリエーション有無、アマゾン在庫有無の表示

●ランキング・新品・中古・コレクター商品の詳細履歴

Reviews

Recent review snapshot

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Store average score4.0Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average2.0Average computed only from synced review bodies below

Reviews with text1Synced review bodies

Total ratings / reviews3Chrome Web Store public rating/review count

Store average score: 4.0. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5★

4★

3★

2★

1★

amor2020年8月10日

APIが高すぎる

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FreemiumConfidence 64

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AI product read

Amazon product sales volume estimator that displays estimated monthly sales numbers on Amazon and Keepa product pages

Amazon sellers need to estimate monthly sales volume for products to make informed inventory purchasing decisions. This extension calculates sales estimates from ranking fluctuations and displays them directly on product pages.

1. User installs extension and configures Keepa API key in options page. 2. User browses Amazon or Keepa product pages. 3. Extension extracts ASIN from URL and sends POST request to koubou3.com backend with ASIN + API key. 4. Backend calculates sales estimates using Keepa data. 5. Extension injects sales estimate box and price history graph into the product page.

Target users: Amazon sellers/merchants (Amazon 出品者) / Inventory purchasing managers / E-commerce product researchers using Keepa

Keepa API pricing tiers not verified - could affect whether effective cost exists
Backend server (koubou3.com) behavior not fully auditable
Could not verify if the koubou3.com backend applies any rate limits or access restrictions

Monetization

No paid features detected

No evidence of payment processing, premium tiers, feature gating, subscription management, or upgrade prompts within the extension. The extension appears to be free; the only external dependency is a Keepa API key which is a separate service's requirement. All keyword hits for 'pro' are false positives (variable names like 'productInfoBox', regex patterns like '/gp/product/', URL patterns). The 'license' hit is from jQuery's MIT license header.

Confidence: 90
Payment platform: --
Source: AI / High
Login required: Yes
Reason: Extension requires a Keepa Private API access key to function. Users must create a Keepa account and obtain the API key from keepa.com/#!api. Without it, the extension displays an error: 'Keepa APIキーを保存してください' and core functionality (sales estimation) is completely blocked.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：storage

Publisher

sedori koubou

Independent publisher

Email: [email protected]
Phone: --
Address: Wakaba 1-8-4-13 Shinjyuku, Tokyo 160-0011 Japan

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Permissions

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