# Citable, pay as you go, Pay per call, GET /v1/keyword-research: Related keywords API

> One seed, the whole picture: keywords and questions from autocomplete and the paid index, with volume, CPC, difficulty and intent attached.

Citable's Pay per call plan for the related keywords API costs $0.30 per 1,000 keywords. Citable's docs list 5 of the 6 fields on our checklist: Search volume, Cost per click, Competition, Keyword difficulty, Search intent.
We haven't run Citable through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
Half of the 226 plans we rank by price cost $0.596 per 1,000 keywords or less. This plan costs less per 1,000 keywords than 54% of the 226 plans.
[Keys.so's ₽34,900 (about $417) 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 (about $417) 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 (about $417) 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/citable/pay-as-you-go-pay-per-call-get-v1-keyword-research
- [Related keywords API: the 9 best providers compared](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://citable.run/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `GET https://citable.run/v1/keyword-research`
- API key: not needed
- Its API docs: https://citable.run/docs/api/keyword-research?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: Citable (https://citable.run?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-07

## In the answer

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

## Price

- $ per 1,000 keywords: $0.30
- Per: page of 200
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: One seed, the whole picture: keywords and questions from autocomplete and the paid index, with volume, CPC, difficulty and intent attached.

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: seed. Optional: country, lang, limit
- Method: GET
- Path: /v1/keyword-research

## About the plan

- Plan: Pay per call
- Who can get it: anyone, with no account or API key, paying each call in USDC from a Solana wallet over x402

## The 15 fields the plan's answer can hold

source keyword, keyword, search volume, cost per click, competition, keyword difficulty, search intent, keyword sources, is question, results returned, results with search volume, question count, total results, country code, language code

## Citable's plans (1)

- [Citable, pay as you go, Pay per call, GET /v1/keyword-research](https://datacircle.dev/related-keywords-apis/citable/pay-as-you-go-pay-per-call-get-v1-keyword-research/llms.txt): $0.30 per 1,000, 83% complete

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

- `GET /v1/keyword-ideas`: [Citable, pay as you go, Pay per call, GET /v1/keyword-ideas](https://datacircle.dev/related-keywords-apis/citable/pay-as-you-go-pay-per-call-get-v1-keyword-ideas/llms.txt)
- `GET /v1/keyword-research`: [Citable, pay as you go, Pay per call, GET /v1/keyword-research](https://datacircle.dev/related-keywords-apis/citable/pay-as-you-go-pay-per-call-get-v1-keyword-research/llms.txt)

## Citable's APIs (6)

- [Citable: domain authority API pricing, 1 plan](https://datacircle.dev/domain-authority-apis/citable/pay-as-you-go/llms.txt)
- [Citable: keyword research API pricing, 1 plan](https://datacircle.dev/keyword-research-apis/citable/pay-as-you-go/llms.txt)
- [Citable: ranked keywords API pricing, 1 plan](https://datacircle.dev/ranked-keywords-apis/citable/pay-as-you-go/llms.txt)
- [Citable: search autocomplete API pricing, 1 plan](https://datacircle.dev/search-autocomplete-apis/citable/pay-as-you-go/llms.txt)
- [Citable: related keywords API pricing, 1 plan, GET /v1/keyword-research](https://datacircle.dev/related-keywords-apis/citable/pay-as-you-go-pay-per-call-get-v1-keyword-research/llms.txt)
- [Citable: SERP API pricing, 1 plan, GET /v1/rank-check](https://datacircle.dev/serp-apis/citable/pay-as-you-go-pay-per-call-get-v1-rank-check/llms.txt)
- [Citable: SERP API pricing, 1 plan, GET /v1/serp](https://datacircle.dev/serp-apis/citable/pay-as-you-go-pay-per-call-get-v1-serp/llms.txt)

## Citable: related keywords API alternatives

- [YepAPI, top-up, Pay as you go, POST /v1/seo/keywords/ideas](https://datacircle.dev/related-keywords-apis/yepapi/top-up-pay-as-you-go-post-v1-seo-keywords-ideas/llms.txt): $0.30 per 1,000, 100% complete, stored
- [Semust, top-up](https://datacircle.dev/related-keywords-apis/semust/top-up/llms.txt): $0.30 per 1,000, 33% 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 2026-11-07.

- https://citable.run?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/docs/api/keyword-research?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/docs/paying?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://citable.run/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing