# UnifAPI, top-up, Pay-as-you-go, POST /geo/keywords/search-volume: Keyword research API

> Look up generative-AI search volume and monthly trend for up to 1000 keywords in a location and language.

UnifAPI's keyword research API on its Pay-as-you-go plan. It costs $1.00 per 1,000 keywords. It returns none of the 6 key fields we check: Search volume, Monthly trend, Cost per click, Competition and 2 more.
Half of the 63 plans we rank by price cost $0.645 per 1,000 keywords or less. This plan is cheaper than 33% of the 63 plans.
[Mangools's $15 monthly plan](https://datacircle.dev/keyword-research-apis/mangools/15-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords: as little as $0.0001. Mangools's $15 monthly plan covers up to 5,000,000 keywords a day.
[DataForSEO](https://datacircle.dev/keyword-research-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-overview-live/llms.txt), [Bing Webmaster Tools](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt) and [Mangools](https://datacircle.dev/keyword-research-apis/mangools/15-monthly/llms.txt) are the best keyword research API providers in our benchmark.

- This page: https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-geo-keywords-search-volume
- [Best keyword research API in 2026: pricing compared](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://unifapi.com/pricing
- Request: `POST https://api.unifapi.com/geo/keywords/search-volume`
- API key: with the plan, on https://unifapi.com/pricing
- Its API docs: https://docs.unifapi.com/api/geo/keywords/search-volume/post
- Sold by: UnifAPI (https://unifapi.com)
- Checked: 2026-11-01

## In the answer

- Completeness: 0%

## Price

- $ per 1,000 keywords: $1.00
- Per: result
- Billing: pay first

## Charges

- Also pays for: from the same budget: 324 other calls

## Not found

- $ per 1,000: $50.00

## In their words

- Their pitch: Look up generative-AI search volume and monthly trend for up to 1000 keywords in a location and language.

## Data

- Keep data: no limit
- Use data: You agree not to use our services for any unlawful purpose or in any way that could damage, disable, or impair the service. Prohibited activities include but are not limited to: Violating any applicable laws or regulations, Infringing on intellectual property rights, Transmitting malicious code or harmful content, Attempting to gain unauthorized access to systems, Interfering with or disrupting the service. [...] You may not use our services to: [...] Send unsolicited bulk messages (spam) [...] Circumvent any access controls or usage limits [...]. Public data has different legal postures depending on jurisdiction and platform. We provide the technical access, you're responsible for downstream use.

## Plan

- Expires: never

## Rate limit

- Per second: 1
- Batch: 1,000

## Speed

- Answer: in the call

## The call

- You send: keywords. Optional: location, language
- Method: POST
- Path: /geo/keywords/search-volume

## About the plan

- Plan: Pay-as-you-go
- Who can get it: anyone

## The 5 fields the plan's answer can hold

location, language, keyword, AI search volume, monthly AI search volume

## UnifAPI's plans (3)

- [UnifAPI, top-up, Pay-as-you-go, POST /geo/keywords/search-volume](https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-geo-keywords-search-volume/llms.txt): $1.00 per 1,000, 0% complete
- [UnifAPI, top-up, Starter top-up, POST /geo/keywords/search-volume](https://datacircle.dev/keyword-research-apis/unifapi/top-up-starter-top-up-post-geo-keywords-search-volume/llms.txt): $1.00 per 1,000, 0% complete
- [UnifAPI, contact us, Enterprise, POST /geo/keywords/search-volume](https://datacircle.dev/keyword-research-apis/unifapi/contact-us-enterprise-post-geo-keywords-search-volume/llms.txt): 0% complete

## UnifAPI's calls for this API (4)

- `POST /geo/keywords/search-volume`: [UnifAPI, top-up, Pay-as-you-go, POST /geo/keywords/search-volume](https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-geo-keywords-search-volume/llms.txt)
- `POST /seo/keywords/history`: [UnifAPI, top-up, Pay-as-you-go, POST /seo/keywords/history](https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-seo-keywords-history/llms.txt)
- `POST /seo/keywords/overview`: [UnifAPI, top-up, Pay-as-you-go, POST /seo/keywords/overview](https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-seo-keywords-overview/llms.txt)
- `POST /seo/keywords/difficulty`: [UnifAPI, top-up, Pay-as-you-go, POST /seo/keywords/difficulty](https://datacircle.dev/keyword-research-apis/unifapi/top-up-pay-as-you-go-post-seo-keywords-difficulty/llms.txt)

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- [UnifAPI: related keywords API pricing, 3 plans, POST /seo/keywords/suggestions](https://datacircle.dev/related-keywords-apis/unifapi/top-up-pay-as-you-go-post-seo-keywords-suggestions/llms.txt)
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## UnifAPI: keyword research API alternatives

- [SpyFu, $2,244 yearly, Team / Agency, POST /apis/keyword_api/v2/related/getKeywordInformation](https://datacircle.dev/keyword-research-apis/spyfu/2244-yearly-team-agency-post-apis-keyword-api-v2-related-getkeywordinformation/llms.txt): $0.20 per 1,000, 67% complete, 1 month
- [Ahrefs, $129 monthly, Lite, GET /v3/keywords-explorer/overview, Overview](https://datacircle.dev/keyword-research-apis/ahrefs/129-monthly-lite-get-v3-keywords-explorer-overview-overview/llms.txt): $0.645 per 1,000, 50% complete
- [Omkar Cloud, $16 monthly, Starter Plan, GET /keywords/volume](https://datacircle.dev/keyword-research-apis/omkar-cloud/16-monthly-starter-plan-get-keywords-volume/llms.txt): $0.80 per 1,000, 67% complete, live
- [Keywords Everywhere, $84 yearly](https://datacircle.dev/keyword-research-apis/keywords-everywhere/84-yearly/llms.txt): $0.84 per 1,000, 67% 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 2026-11-01.

- https://api.unifapi.com/openapi.json
- https://docs.unifapi.com/api/geo/keywords/search-volume/post
- https://docs.unifapi.com/rate-limits
- https://unifapi.com/apis/geo/keywords/search-volume/post
- https://unifapi.com/apis/linkedin
- https://unifapi.com/legal/acceptable-use-policy
- https://unifapi.com/legal/terms-of-service
- https://unifapi.com/pricing
- https://unifapi.com/pricing.md