# Rakko Keyword, ¥4,950 monthly: Related keywords API

> 検索上位サイトが他にも獲得しているSEOキーワードを収集します。検索意図が近いキーワードを探して、網羅的にCVRの高いキーワードを抑えましょう。

Rakko Keyword's related keywords API on its Standard (monthly) plan. It costs $0.0094 per 1,000 keywords. Rakko Keyword's docs list 4 of the 6 key fields we check: Search volume, Cost per click, Competition, Keyword difficulty.
¥1.50 per 1,000 keywords is $0.0094 at the European Central Bank's rate of $6.3283 for ¥1,000.
We haven't run Rakko Keyword through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
Half of the 194 plans we rank by price cost $0.60 per 1,000 keywords or less. This plan costs less per 1,000 keywords than 77% of the 194 plans.
[Keys.so's ₽34,900 monthly plan](https://datacircle.dev/related-keywords-apis/keys-so/34900-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords. Keys.so's ₽34,900 monthly plan charges nothing per call. You get as many keywords as Keys.so's rate limit allows.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/related-keywords-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than Keys.so's ₽34,900 monthly plan.
[Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt), [DataForSEO](https://datacircle.dev/related-keywords-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt) and [Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/rakko-keyword/4950-monthly
- [Related keywords API: the 7 best providers compared](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://rakkokeyword.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `POST https://api.rakkokeyword.com/v1/ranking-keywords`
- API key: with the plan, on https://rakkokeyword.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://api.rakkokeyword.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing#/%E5%90%8C%E6%99%82%E3%83%A9%E3%83%B3%E3%82%AF%E3%82%A4%E3%83%B3%E3%82%AD%E3%83%BC%E3%83%AF%E3%83%BC%E3%83%89/RankingKeywordsController_search
- Sold by: Rakko Keyword (https://rakkokeyword.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 67%
- Search volume: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓

## Price

- $ per 1,000 keywords: $0.0094
- Per: page of 5,000
- Billing: monthly
- $ a month: $31.33

## Charges

- Also pays for: from the same budget: サジェストキーワード取得 · 関連キーワード取得 · 潜在的な検索キーワード/質問（LSI/PAA）取得 · よくある質問検索取得 · 語彙検索 · 一括キーワード調査登録 · 獲得キーワード調査取得 · 獲得ページ調査取得 · 競合サイト抽出 · 獲得キーワード調査の推移取得 · 獲得キーワード調査の統計取得 · 獲得キーワード調査のAIO取得 · 一括サイト調査 · 集客コンテンツ検索 · 見出し抽出取得 · 共起語取得 · 検索順位チェック登録 · サイト検索

## Overage

- Units cap: hard

## In their words

- Their pitch: 検索上位サイトが他にも獲得しているSEOキーワードを収集します。検索意図が近いキーワードを探して、網羅的にCVRの高いキーワードを抑えましょう。

## Data

- Keep data: no limit
- Use data: "利用者が単一のAPIキーを用いて第三者向けの機能またはサービスとして提供しようとする場合には、事前に当社との個別のライセンス契約を締結しなければなりません。" [...] "利用者は、本APIの利用にあたり以下の行為をしてはなりません。" "APIキーの転売、貸与又は不特定多数への共有", "本サービスに過度の負荷をかける利用", "レート制限等を回避する目的での複数アカウントの利用", "違法サイト、スパム行為又は公序良俗に反するコンテンツでの利用", "当社と公式に提携しているかのような誤解を招く形での当社ロゴや名称の使用", "その他、本規約等に定める禁止行為" [...] "以下に該当する利用を行う場合は、第１９条第２項に従い、事前に当社との個別ライセンス契約を締結しなければなりません（ライセンス必要利用）。" "エンドユーザーが本APIまたは取得データを継続的に検索・閲覧・取得できるサービス・アプリケーションの提供", "取得データを実質的に再提供するサービスの提供（ホワイトラベルSaaSを含みます）", "単一のAPIキーを用いて複数のエンドユーザーに本API由来の機能・データを継続的に提供するサービス", "本サービスと競合する機能・用途を主目的として第三者に提供するサービス" [...] "利用者は、本APIに対し、エンドユーザーその他第三者の個人情報（個人データ、個人関連情報を含みます）、機密情報、その他特定の個人を識別できる情報を送信してはなりません。"

## Plan

- Pay: ¥4,950
- You get: 3,000 credits a month
- Enough for: about 666 pages a month
- Expires: 2 months

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword. Optional: searchTop, searchRange, filter.keyword.includes, filter.keyword.notIncludes, filter.seoDifficulty.min, filter.seoDifficulty.max, filter.searchVolume.min, filter.searchVolume.max, filter.cpc.min, filter.cpc.max, filter.competition.min, filter.competition.max, filter.relevance.min, filter.relevance.max, sortBy, orderBy, limit
- Method: POST
- Path: /v1/ranking-keywords

## About the plan

- Plan: Standard (monthly)
- Who can get it: anyone

## The 9 fields the plan's answer can hold

seed keyword, keyword, keyword relevance, search volume, cost per click, competition, keyword difficulty, total results, items count

## Rakko Keyword's plans (6)

- [Rakko Keyword, ¥4,950 monthly](https://datacircle.dev/related-keywords-apis/rakko-keyword/4950-monthly/llms.txt): $0.0094 per 1,000, 67% complete
- [Rakko Keyword, ¥9,900 monthly](https://datacircle.dev/related-keywords-apis/rakko-keyword/9900-monthly/llms.txt): $0.009 per 1,000, 67% complete
- [Rakko Keyword, ¥19,800 monthly](https://datacircle.dev/related-keywords-apis/rakko-keyword/19800-monthly/llms.txt): $0.0084 per 1,000, 67% complete
- [Rakko Keyword, ¥29,700 yearly](https://datacircle.dev/related-keywords-apis/rakko-keyword/29700-yearly/llms.txt): $0.0047 per 1,000, 67% complete
- [Rakko Keyword, ¥59,400 yearly](https://datacircle.dev/related-keywords-apis/rakko-keyword/59400-yearly/llms.txt): $0.0045 per 1,000, 67% complete
- [Rakko Keyword, ¥118,800 yearly](https://datacircle.dev/related-keywords-apis/rakko-keyword/118800-yearly/llms.txt): $0.0042 per 1,000, 67% complete

## Rakko Keyword's calls for this API (1)

- `POST /v1/ranking-keywords`: [Rakko Keyword, ¥4,950 monthly](https://datacircle.dev/related-keywords-apis/rakko-keyword/4950-monthly/llms.txt)

## Rakko Keyword's APIs (4)

- [Rakko Keyword: search autocomplete API pricing, 6 plans, POST /v1/suggest-keywords, サジェストキーワード取得, Amazon](https://datacircle.dev/search-autocomplete-apis/rakko-keyword/4950-monthly-standard-monthly-post-v1-suggest-keywords-amazon/llms.txt)
- [Rakko Keyword: search autocomplete API pricing, 6 plans, POST /v1/suggest-keywords, サジェストキーワード取得, Bing](https://datacircle.dev/search-autocomplete-apis/rakko-keyword/4950-monthly-standard-monthly-post-v1-suggest-keywords-bing/llms.txt)
- [Rakko Keyword: search autocomplete API pricing, 6 plans, POST /v1/suggest-keywords, サジェストキーワード取得, Google](https://datacircle.dev/search-autocomplete-apis/rakko-keyword/4950-monthly-standard-monthly-post-v1-suggest-keywords-google/llms.txt)
- [Rakko Keyword: search autocomplete API pricing, 6 plans, POST /v1/suggest-keywords, サジェストキーワード取得, YouTube](https://datacircle.dev/search-autocomplete-apis/rakko-keyword/4950-monthly-standard-monthly-post-v1-suggest-keywords-youtube/llms.txt)
- [Rakko Keyword: keyword research API pricing, 6 plans](https://datacircle.dev/keyword-research-apis/rakko-keyword/4950-monthly/llms.txt)
- [Rakko Keyword: ranked keywords API pricing, 6 plans](https://datacircle.dev/ranked-keywords-apis/rakko-keyword/4950-monthly/llms.txt)
- [Rakko Keyword: related keywords API pricing, 6 plans](https://datacircle.dev/related-keywords-apis/rakko-keyword/4950-monthly/llms.txt)

## Rakko Keyword: related keywords API alternatives

- [Marketing Miner, €69 monthly, Digger, POST /keywords/suggestions](https://datacircle.dev/related-keywords-apis/marketing-miner/69-monthly-digger-post-keywords-suggestions/llms.txt): $0.0078 per 1,000, 17% complete
- [Mangools, $5 monthly](https://datacircle.dev/related-keywords-apis/mangools/5-monthly/llms.txt): $0.0083 per 1,000, 83% complete
- [5118, CNY 6,000 pack, Package 3, POST /keyword/word/v2](https://datacircle.dev/related-keywords-apis/5118/cny-6000-pack-post-keyword-word-v2/llms.txt): $0.009 per 1,000, 17% complete
- [SpyWords, ₽40,000 monthly](https://datacircle.dev/related-keywords-apis/spywords/40000-monthly/llms.txt): $0.012 per 1,000, 33% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-06.

- https://api.rakkokeyword.com/api-docs.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://api.rakkokeyword.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://api.rakkokeyword.com/docs/swagger-ui-init.js?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://rakkokeyword.com/knowledge/9510/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://rakkokeyword.com/knowledge/9777/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://rakkokeyword.com/knowledge/qa/paid-plan-qa?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://rakkokeyword.com/knowledge/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://rakkokeyword.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing