# YepAPI, free credit, POST /v1/seo/keywords/related: Related keywords API

> Related keywords for a seed keyword

YepAPI's related keywords API on its Free credit plan. It costs $0.00 per 1,000 keywords. It returns all 6 key fields we check: Search volume, Monthly trend, Cost per click, Competition, Keyword difficulty, Search intent.
We haven't run YepAPI through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
This plan is free. We rank 143 plans for related keywords APIs by price. Half the plans cost $0.486 per 1,000 keywords or less.
[XMLRiver's ₽15,000 monthly plan](https://datacircle.dev/related-keywords-apis/xmlriver/15000-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords: $0.00009. XMLRiver charges for each page of results. We count 2,000 keywords on each page to get the $0.00009 price.
[Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/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 [AnyAPI](https://datacircle.dev/related-keywords-apis/anyapi/top-up-from-10-manual-top-up-post-v1-run-seo-related-keywords/llms.txt) are the best related keywords API providers in our benchmark.

- This page: https://datacircle.dev/related-keywords-apis/yepapi/free-credit-post-v1-seo-keywords-related
- [Related keywords API: 4 providers compared on price and data](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://docs.yepapi.com/getting-started/billing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `POST https://api.yepapi.com/v1/seo/keywords/related`
- API key: with the plan, on https://docs.yepapi.com/getting-started/billing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://docs.yepapi.com/seo-keywords/keywords-related?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: YepAPI (https://www.yepapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 100%
- Search volume: ✓
- Monthly trend: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- $ per 1,000 keywords: $0.00
- Per: result
- Billing: free

## Charges

- Start fee: $0.00
- Also pays for: from the same budget: 154 other calls

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Related keywords for a seed keyword

## Data

- Keep data: no limit
- Use data: You agree not to use YepAPI to: Violate any applicable law or regulation, Infringe on intellectual property rights of any third party, Transmit malicious code, spam, or abusive content, Attempt to reverse-engineer, scrape, or resell our service, Exceed reasonable usage patterns or abuse rate limits

## Plan

- Pay: $0
- You get: $5
- Enough for: about 16,666 results, once

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword. Optional: limit, location_code, language, include_clickstream, filters, match, sort
- Method: POST
- Path: /v1/seo/keywords/related

## About the plan

- Plan: Free credit
- Who can get it: anyone

## The 13 fields the plan's answer can hold

seed keyword, keyword, search volume, cost per click, keyword difficulty, competition, competition level, main intent, top results average backlinks, top results average referring domains, SERP item types, search results count, monthly searches

## YepAPI's plans (2)

- [YepAPI, free credit, POST /v1/seo/keywords/related](https://datacircle.dev/related-keywords-apis/yepapi/free-credit-post-v1-seo-keywords-related/llms.txt): $0.00 per 1,000, 100% complete
- [YepAPI, top-up, Pay as you go, POST /v1/seo/keywords/related](https://datacircle.dev/related-keywords-apis/yepapi/top-up-pay-as-you-go-post-v1-seo-keywords-related/llms.txt): $0.30 per 1,000, 100% complete

## YepAPI's calls for this API (2)

- `POST /v1/seo/keywords/ideas`: [YepAPI, free credit, POST /v1/seo/keywords/ideas](https://datacircle.dev/related-keywords-apis/yepapi/free-credit-post-v1-seo-keywords-ideas/llms.txt)
- `POST /v1/seo/keywords/related`: [YepAPI, free credit, POST /v1/seo/keywords/related](https://datacircle.dev/related-keywords-apis/yepapi/free-credit-post-v1-seo-keywords-related/llms.txt)

## YepAPI's APIs (36)

- [YepAPI: Amazon product API pricing, 2 plans](https://datacircle.dev/amazon-product-apis/yepapi/free/llms.txt)
- [YepAPI: Amazon search API pricing, 2 plans](https://datacircle.dev/amazon-search-apis/yepapi/free/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/bing](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-bing/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/yahoo](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-yahoo/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-ads](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-ads/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-datasets](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-datasets/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google-finance](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google-finance/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/search/google](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-search-google/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/serp/google](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-serp-google/llms.txt)
- [YepAPI: SERP API pricing, 2 plans, POST /v1/seo/serp](https://datacircle.dev/serp-apis/yepapi/free-credit-post-v1-seo-serp/llms.txt)
- [YepAPI: Google AI Mode scraper API pricing, 2 plans](https://datacircle.dev/google-ai-mode-scraper-apis/yepapi/free/llms.txt)
- [YepAPI: image search API pricing, 2 plans](https://datacircle.dev/image-search-apis/yepapi/free/llms.txt)
- [YepAPI: search autocomplete API pricing, 2 plans](https://datacircle.dev/search-autocomplete-apis/yepapi/free/llms.txt)
- [YepAPI: company discovery API pricing, 2 plans](https://datacircle.dev/company-discovery-apis/yepapi/free/llms.txt)
- [YepAPI: news API pricing, 2 plans](https://datacircle.dev/news-apis/yepapi/free/llms.txt)
- [YepAPI: Instagram post API pricing, 2 plans](https://datacircle.dev/instagram-post-apis/yepapi/free/llms.txt)
- [YepAPI: Reddit post API pricing, 2 plans](https://datacircle.dev/reddit-post-apis/yepapi/free/llms.txt)
- [YepAPI: Reddit profile API pricing, 2 plans](https://datacircle.dev/reddit-profile-apis/yepapi/free/llms.txt)
- [YepAPI: TikTok profile API pricing, 2 plans](https://datacircle.dev/tiktok-profile-apis/yepapi/free/llms.txt)
- [YepAPI: TikTok video API pricing, 2 plans](https://datacircle.dev/tiktok-video-apis/yepapi/free/llms.txt)
- [YepAPI: Walmart product API pricing, 2 plans](https://datacircle.dev/walmart-product-apis/yepapi/free/llms.txt)
- [YepAPI: Walmart search API pricing, 2 plans](https://datacircle.dev/walmart-search-apis/yepapi/free/llms.txt)
- [YepAPI: X post API pricing, 2 plans](https://datacircle.dev/x-post-apis/yepapi/free/llms.txt)
- [YepAPI: backlink API pricing, 2 plans](https://datacircle.dev/backlink-apis/yepapi/free/llms.txt)
- [YepAPI: company enrichment API pricing, 2 plans](https://datacircle.dev/company-enrichment-apis/yepapi/free/llms.txt)
- [YepAPI: similar companies API pricing, 2 plans](https://datacircle.dev/similar-company-apis/yepapi/free/llms.txt)
- [YepAPI: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/yepapi/free/llms.txt)
- [YepAPI: phone finder API pricing, 2 plans](https://datacircle.dev/find-phone-apis/yepapi/free/llms.txt)
- [YepAPI: people search API pricing, 2 plans](https://datacircle.dev/people-search-apis/yepapi/free/llms.txt)
- [YepAPI: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/yepapi/free/llms.txt)
- [YepAPI: ranked keywords API pricing, 2 plans](https://datacircle.dev/ranked-keywords-apis/yepapi/free/llms.txt)
- [YepAPI: video search API pricing, 2 plans](https://datacircle.dev/video-search-apis/yepapi/free/llms.txt)
- [YepAPI: YouTube channel video API pricing, 2 plans](https://datacircle.dev/youtube-channel-video-apis/yepapi/free/llms.txt)
- [YepAPI: X profile API pricing, 2 plans, POST /v1/twitter/user-about](https://datacircle.dev/x-profile-apis/yepapi/free-credit-post-v1-twitter-user-about/llms.txt)
- [YepAPI: X profile API pricing, 2 plans, POST /v1/twitter/user](https://datacircle.dev/x-profile-apis/yepapi/free-credit-post-v1-twitter-user/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/author-finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-author-finder/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-finder/llms.txt)
- [YepAPI: email finder API pricing, 2 plans, POST /v1/email/linkedin-finder](https://datacircle.dev/find-email-apis/yepapi/free-credit-post-v1-email-linkedin-finder/llms.txt)
- [YepAPI: YouTube channel API pricing, 2 plans, POST /v1/youtube/channel-about](https://datacircle.dev/youtube-channel-apis/yepapi/free-credit-post-v1-youtube-channel-about/llms.txt)
- [YepAPI: YouTube channel API pricing, 2 plans, POST /v1/youtube/channel](https://datacircle.dev/youtube-channel-apis/yepapi/free-credit-post-v1-youtube-channel/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/combined](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-combined/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/enrich](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-enrich/llms.txt)
- [YepAPI: reverse email lookup API pricing, 2 plans, POST /v1/email/person](https://datacircle.dev/reverse-email-lookup-apis/yepapi/free-credit-post-v1-email-person/llms.txt)
- [YepAPI: domain authority API pricing, 2 plans, POST /v1/seo/domain/metrics](https://datacircle.dev/domain-authority-apis/yepapi/free-credit-post-v1-seo-domain-metrics/llms.txt)
- [YepAPI: domain authority API pricing, 2 plans, POST /v1/seo/domain/overview](https://datacircle.dev/domain-authority-apis/yepapi/free-credit-post-v1-seo-domain-overview/llms.txt)
- [YepAPI: tech stack API pricing, 2 plans, POST /v1/seo/domain/technologies](https://datacircle.dev/company-technology-apis/yepapi/free-credit-post-v1-seo-domain-technologies/llms.txt)
- [YepAPI: tech stack API pricing, 2 plans, POST /v1/email/technology](https://datacircle.dev/company-technology-apis/yepapi/free-credit-post-v1-email-technology/llms.txt)
- [YepAPI: web scraping API pricing, 2 plans, POST /v1/scrape/js](https://datacircle.dev/web-scraping-apis/yepapi/free-credit-post-v1-scrape-js/llms.txt)
- [YepAPI: web scraping API pricing, 2 plans, POST /v1/scrape/stealth](https://datacircle.dev/web-scraping-apis/yepapi/free-credit-post-v1-scrape-stealth/llms.txt)
- [YepAPI: web scraping API pricing, 2 plans, POST /v1/scrape](https://datacircle.dev/web-scraping-apis/yepapi/free-credit-post-v1-scrape/llms.txt)
- [YepAPI: related keywords API pricing, 2 plans, POST /v1/seo/keywords/related](https://datacircle.dev/related-keywords-apis/yepapi/free-credit-post-v1-seo-keywords-related/llms.txt)
- [YepAPI: keyword research API pricing, 2 plans, POST /v1/seo/keywords/overview](https://datacircle.dev/keyword-research-apis/yepapi/free-credit-post-v1-seo-keywords-overview/llms.txt)
- [YepAPI: keyword research API pricing, 2 plans, POST /v1/seo/keywords](https://datacircle.dev/keyword-research-apis/yepapi/free-credit-post-v1-seo-keywords/llms.txt)
- [YepAPI: Instagram profile API pricing, 2 plans, POST /v1/instagram/user-about](https://datacircle.dev/instagram-profile-apis/yepapi/free-credit-post-v1-instagram-user-about/llms.txt)
- [YepAPI: Instagram profile API pricing, 2 plans, POST /v1/instagram/user](https://datacircle.dev/instagram-profile-apis/yepapi/free-credit-post-v1-instagram-user/llms.txt)

## YepAPI: related keywords API alternatives

- [QuanticData, $79 monthly](https://datacircle.dev/related-keywords-apis/quanticdata/79-monthly/llms.txt): $0.253 per 1,000, 0% complete, live
- [Ranxplorer, €2,500 pack, Sans abonnement 10 M, GET /v1/kwd/relatedsearches](https://datacircle.dev/related-keywords-apis/ranxplorer/2500-pack-sans-abonnement-10-m-get-v1-kwd-relatedsearches/llms.txt): $0.281 per 1,000, 83% complete
- [Ahrefs, $249 monthly, Standard, GET /v3/keywords-explorer/matching-terms, Matching terms](https://datacircle.dev/related-keywords-apis/ahrefs/249-monthly-standard-get-v3-keywords-explorer-matching-terms-matching-terms/llms.txt): $0.311 per 1,000, 50% complete
- [Keywords Everywhere, $8,000 pack, 50,000,000 credits, POST /v1/get_pasf_keywords](https://datacircle.dev/related-keywords-apis/keywords-everywhere/8000-pack-50000000-credits-post-v1-get-pasf-keywords/llms.txt): $0.32 per 1,000, 0% 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 2026-11-04.

- https://docs.yepapi.com/getting-started/billing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://docs.yepapi.com/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://docs.yepapi.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://docs.yepapi.com/seo-keywords/keywords-related?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.yepapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.yepapi.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing