# FreeQ, pay as you go: Related keywords API

> Generate keyword ideas from a seed keyword with volume data.

FreeQ's x402 pay per call plan for the related keywords API costs $0.50 per 1,000 keywords. We check each provider's docs for 6 fields. FreeQ's docs list 1: Search volume.
We haven't run FreeQ through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
We rank 227 plans for related keywords APIs by price. Half the plans cost $0.594 or less per 1,000 keywords. This plan costs less per 1,000 keywords than 50% of the 227 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. [AnyAPI's pay-as-you-go plan](https://datacircle.dev/related-keywords-apis/anyapi/pay-as-you-go-pay-per-call-with-x402-and-mpp-post-v1-run-seo-related-keywords/llms.txt) costs the least for 10,000 keywords a month: $1.60.
[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.
[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), [Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt) and [Bukvarix](https://datacircle.dev/related-keywords-apis/bukvarix/free-without-registration-post-v1-mkeywords/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/freeq/pay-as-you-go
- [Related keywords API: the best SEO keyword data providers](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://x402.freeq.one/tools?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `POST https://x402.freeq.one/tools/keyword_ideas`
- API key: not needed
- Its API docs: https://x402.freeq.one/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing#/paths/~1tools~1keyword_ideas
- Sold by: FreeQ (https://freeq.one?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 17%
- Search volume: ✓

## Price

- $ per 1,000 keywords: $0.50
- Per: page of 100
- Billing: pay as you go

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Generate keyword ideas from a seed keyword with volume data.

## 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: keyword. Optional: limit, location_code, language_code
- Method: POST
- Path: /tools/keyword_ideas

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying each call in USDC on Base (x402), no account or API key

## The 2 fields the plan's answer can hold

keyword, search volume

## FreeQ's plans (1)

- [FreeQ, pay as you go](https://datacircle.dev/related-keywords-apis/freeq/pay-as-you-go/llms.txt): $0.50 per 1,000, 17% complete

## FreeQ's calls for this API (1)

- `POST /tools/keyword_ideas`: [FreeQ, pay as you go](https://datacircle.dev/related-keywords-apis/freeq/pay-as-you-go/llms.txt)

## FreeQ's APIs (11)

- [FreeQ: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: domain authority API pricing, 1 plan](https://datacircle.dev/domain-authority-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: email finder API pricing, 1 plan](https://datacircle.dev/find-email-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: job postings API pricing, 1 plan](https://datacircle.dev/job-posting-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: people enrichment API pricing, 1 plan](https://datacircle.dev/person-enrichment-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: ranked keywords API pricing, 1 plan](https://datacircle.dev/ranked-keywords-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: related keywords API pricing, 1 plan](https://datacircle.dev/related-keywords-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: keyword research API pricing, 1 plan](https://datacircle.dev/keyword-research-apis/freeq/pay-as-you-go/llms.txt)
- [FreeQ: SERP API pricing, 1 plan](https://datacircle.dev/serp-apis/freeq/pay-as-you-go/llms.txt)

## FreeQ: related keywords API alternatives

- [Morningscore, $2,990 yearly](https://datacircle.dev/related-keywords-apis/morningscore/2990-yearly/llms.txt): $0.498 per 1,000, 50% complete
- [SocQ, top-up from $5, Starter, POST /v1/seo/keyword-suggestions](https://datacircle.dev/related-keywords-apis/socq/top-up-from-5-starter-post-v1-seo-keyword-suggestions/llms.txt): $0.50 per 1,000, 100% complete
- [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): $0.50 per 1,000, 83% complete
- [Keywords Everywhere, $500 pack, 2,000,000 credits, POST /v1/get_pasf_keywords](https://datacircle.dev/related-keywords-apis/keywords-everywhere/500-pack-2000000-credits-post-v1-get-pasf-keywords/llms.txt): $0.50 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 2026-11-09.

- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://x402.freeq.one/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://x402.freeq.one/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://x402.freeq.one/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://x402.freeq.one/tools?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing