# Serpstat, $999 yearly, API Standard, POST /v4, getRelatedKeywords: Related keywords API

> The SerpstatKeywordProcedure.getRelatedKeywords method shows all search queries that are semantically related to the searched keyword.

Serpstat's related keywords API on its API Standard plan. It costs $0.167 per 1,000 keywords. Serpstat's docs list 5 of the 6 key fields we check: Search volume, Cost per click, Competition, Keyword difficulty, Search intent.
We haven't run Serpstat 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 59% 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/serpstat/999-yearly-api-standard-post-v4-getrelatedkeywords
- [Related keywords API: the 7 best providers compared](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://serpstat.com/page/api-pricing-plans/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `POST https://api.serpstat.com/v4`, getRelatedKeywords
- API key: with the plan, on https://serpstat.com/page/api-pricing-plans/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://api-docs.serpstat.com/docs/serpstat-public-api/7yidbv07n5q9u-get-related-keywords?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: Serpstat (https://serpstat.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-10-29

## In the answer

- Completeness: 83%
- Search volume: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- $ per 1,000 keywords: $0.167
- Per: result
- Billing: yearly
- $ a month: $83.25

## Charges

- Repeat free: never
- Also pays for: from the same budget: getDomainKeywords · getKeywords · getKeywordsInfo · getSuggestions

## Not found

- $ per 1,000: $0.167

## In their words

- Their pitch: The SerpstatKeywordProcedure.getRelatedKeywords method shows all search queries that are semantically related to the searched keyword.

## Data

- Keep data: no limit
- Use data: §2.1 of https://serpstat.com/users/license-agreement/ (docs' "Terms of Service" link): "We grant you a limited, revocable, non-exclusive license to access and make personal use of the Serpstat and the Software in accordance with your Plan. The Serpstat and the Software, in whole or in part, may not be reproduced, republished, downloaded, uploaded, duplicated, copied, sold, resold, visited, or otherwise exploited for any commercial purpose without our prior written express consent. User login credentials may not be shared with anyone." [...] §2.2.1.1 "You will not: Use the Serpstat for any purposes other than the purpose expressly allowed by us herein" [...] §2.2.1.2 "You will not: Rent, lease, loan, sell, resell, sublicense, distribute or otherwise transfer the licenses granted herein or any materials contained in the Serpstat" [...] §2.2.1.3 "You will not: Use the Serpstat for any illegal purpose, harmful manner, or in violation of any local, state, national, or international law, including, without limitation, laws governing intellectual property and other proprietary rights, and data protection and privacy" [...] §2.2.1.4 "You will not: Remove, circumvent, disable, damage or otherwise interfere with security-related features of the Serpstat, features that prevent or restrict use or copying of any content accessible through the Serpstat, or features that enforce limitations on the use of the Serpstat" [...] §2.2.1.5 "You will not: Reverse engineer, decompile, disassemble or otherwise attempt to discover the source code of the Software, Website or any part thereof" [...] §2.2.1.6 "You will not: Modify, adapt, translate or create derivative works based upon the Serpstat, the content of the Services or any part thereof, except and only to the extent foregoing restriction is expressly prohibited by applicable law" [...] §2.2.2 "You will not: Intentionally interfere with or damage operation of the Serpstat or any user’s enjoyment of them, by any means, including uploading or otherwise disseminating viruses, adware, spyware, worms, or other malicious code" [...] §2.2.3 "You will not: Use the Serpstat in order to provide similar services to any third party or for competing with our Service" [...] §2.2.4 "You will not: Use Serpstat or content on any platform or website not provided and approved by us, make any misrepresentations or abuse Serpstat, or otherwise violate anyone’s rights or any applicable laws" [...] §5.2.2 "We can unilateral cancel your User Account in case of: [...] Diversions from the normal usage patterns established by Company"

## Plan

- Pay: $999
- You get: 6,000,000 credits a year
- Enough for: 6,000,000 results a year

## Rate limit

- Per second: 5
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: id, method "SerpstatKeywordProcedure.getRelatedKeywords", params.keyword, params.se. Optional: params.withIntents, params.filters, params.sort, params.page, params.size
- Method: POST
- Path: /v4

## About the plan

- Plan: API Standard
- Who can get it: anyone

## The 11 fields the plan's answer can hold

keyword, search volume, cost per click, competition, geo names, SERP item types, right spelling, weight, keyword difficulty, intents, total results

## Serpstat's plans (3)

- [Serpstat, $999 yearly, API Standard, POST /v4, getRelatedKeywords](https://datacircle.dev/related-keywords-apis/serpstat/999-yearly-api-standard-post-v4-getrelatedkeywords/llms.txt): $0.167 per 1,000, 83% complete
- [Serpstat, $1,999 yearly, API Advanced, POST /v4, getRelatedKeywords](https://datacircle.dev/related-keywords-apis/serpstat/1999-yearly-api-advanced-post-v4-getrelatedkeywords/llms.txt): $0.20 per 1,000, 83% complete
- [Serpstat, $5,999 yearly, API Enterprise, POST /v4, getRelatedKeywords](https://datacircle.dev/related-keywords-apis/serpstat/5999-yearly-api-enterprise-post-v4-getrelatedkeywords/llms.txt): $0.20 per 1,000, 83% complete

## Serpstat's calls for this API (3)

- `POST /v4`, getKeywords: [Serpstat, $999 yearly, API Standard, POST /v4, getKeywords](https://datacircle.dev/related-keywords-apis/serpstat/999-yearly-api-standard-post-v4-getkeywords/llms.txt)
- `POST /v4`, getRelatedKeywords: [Serpstat, $999 yearly, API Standard, POST /v4, getRelatedKeywords](https://datacircle.dev/related-keywords-apis/serpstat/999-yearly-api-standard-post-v4-getrelatedkeywords/llms.txt)
- `POST /v4`, getSuggestions: [Serpstat, $999 yearly, API Standard, POST /v4, getSuggestions](https://datacircle.dev/related-keywords-apis/serpstat/999-yearly-api-standard-post-v4-getsuggestions/llms.txt)

## Serpstat's APIs (4)

- [Serpstat: SERP API pricing, 1 plan](https://datacircle.dev/serp-apis/serpstat/top-up-from-300/llms.txt)
- [Serpstat: keyword research API pricing, 3 plans](https://datacircle.dev/keyword-research-apis/serpstat/999-yearly/llms.txt)
- [Serpstat: ranked keywords API pricing, 3 plans](https://datacircle.dev/ranked-keywords-apis/serpstat/999-yearly/llms.txt)
- [Serpstat: related keywords API pricing, 3 plans, POST /v4, getRelatedKeywords](https://datacircle.dev/related-keywords-apis/serpstat/999-yearly-api-standard-post-v4-getrelatedkeywords/llms.txt)

## Serpstat: related keywords API alternatives

- [SellerSprite, CNY 49,990 yearly](https://datacircle.dev/related-keywords-apis/sellersprite/cny-49990-yearly/llms.txt): $0.156 per 1,000, 17% complete
- [AnyAPI, top-up from $10, Manual top-up, POST /v1/run/seo.keyword_suggestions](https://datacircle.dev/related-keywords-apis/anyapi/top-up-from-10-manual-top-up-post-v1-run-seo-keyword-suggestions/llms.txt): $0.16 per 1,000, 100% complete, 1 month
- [Seonio, $30 monthly](https://datacircle.dev/related-keywords-apis/seonio/30-monthly/llms.txt): $0.16 per 1,000, 100% complete
- [QuanticData, $299 monthly](https://datacircle.dev/related-keywords-apis/quanticdata/299-monthly/llms.txt): $0.167 per 1,000, 0% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-29.

- https://api-docs.serpstat.com/docs/serpstat-public-api/0b54hq7qrsbab-serpstat-serp-crawling-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://api-docs.serpstat.com/docs/serpstat-public-api/139902435d58c-serp-scraper-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://api-docs.serpstat.com/docs/serpstat-public-api/25i6hwpyk7drz-credits-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://api-docs.serpstat.com/docs/serpstat-public-api/7yidbv07n5q9u-get-related-keywords?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://help.serpstat.com/en/articles/15956925-credits-and-subscriptions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://serpstat.com/page/api-pricing-plans/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://serpstat.com/page/license-agreement?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://serpstat.com/users/license-agreement/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://serpstat.com/users/privacy-policy/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing