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UnifAPI pricing and alternatives: keyword research API, POST /seo/keywords/overview

UnifAPI's sitellms.txtBest keyword research API in 2026: pricing comparedUnifAPI: keyword research API alternatives

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100% complete: all 6 key fields we checkSee the 6 fields
$1.00per 1,000 keywordsHalf 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 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, Bing Webmaster Tools and Mangools are the best keyword research API providers in our benchmark.
Plan: Pay-as-you-go one of UnifAPI's 3 plans
Call: POST /seo/keywords/overview one of UnifAPI's 4 calls for this API
API: Keyword research API one of UnifAPI's 68 APIs

About this item

  • Freshness. We don't know how fresh this plan's data is.
  • All 6 key fields we check. Search volume, Monthly trend, Cost per click, Competition, Keyword difficulty, Search intent.
  • A balance you top up. You pay any amount. You spend the whole balance on calls.
  • One call. You send keywords to POST /seo/keywords/overview. You can also send location, language, include_serp_info and view. The call returns each keyword's search data.
  • Anyone can get it. Keep data: no limit. Use data: with conditions.

UnifAPI: keyword research API alternatives

We list other providers' plans closest to this plan in price per 1,000 keywords.

This planUnifAPI, top-up, Pay-as-you-go, POST /seo/keywords/overviewSpyFu, $2,244 yearly, Team / Agency, POST /apis/keyword_api/v2/related/getKeywordInformationAhrefs, $129 monthly, Lite, GET /v3/keywords-explorer/overview, OverviewOmkar Cloud, $16 monthly, Starter Plan, GET /keywords/volumeKeywords Everywhere, $84 yearly
$ per 1,000 keywords$1.00$0.20$0.645$0.80$0.84
Completeness100%67%50%67%67%
Billingpay firstyearlymonthlymonthlyyearly
Payany amount$2,244$129$16$84
Enough foras many as you pay for500,000 results a month200,000 results a month20,000 calls a month100,000 results a year
Freshnessunknown1 monthunknownliveunknown
Who can get itanyoneanyoneanyone with an Ahrefs account, only workspace owners and admins create API keysanyone aged 18 or over who is not in a country under a United States embargo or on a United States list of prohibited or restricted partiesanyone 13 or over with a Keywords Everywhere account

Every keyword research API provider we score, ranked

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.

  1. api.unifapi.com/openapi.json
  2. docs.unifapi.com/api/seo/keywords/overview/post
  3. docs.unifapi.com/rate-limits
  4. unifapi.com/apis/linkedin
  5. unifapi.com/apis/seo/keywords/overview/post
  6. unifapi.com/legal/acceptable-use-policy
  7. unifapi.com/legal/terms-of-service
  8. unifapi.com/pricing
  9. unifapi.com/pricing.md

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Search volume
  • Monthly trend
  • Cost per click
  • Competition
  • Keyword difficulty
  • Search intent
Price
$ per 1,000 keywords$1.00
Perresult
Billingpay first
Charges
Also pays forfrom the same budget: 324 other calls
Not found
$ per 1,000$50.00
In their words
Their pitchReturn current SEO metrics for specified keywords, including search volume, CPC, competition, keyword difficulty, and search intent, for prioritizing keyword targets.
Data
Keep datano limit
Use dataYou 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
Expiresnever
Rate limit
Per second1
Batch700
Speed
Answerin the call
The call
You sendkeywords. Optional: location, language, include_serp_info, view
MethodPOST
Path/seo/keywords/overview
About the plan
PlanPay-as-you-go
Who can get itanyone
The 21 fields the plan's answer can hold

keywords, location, language, view, keyword, search volume, CPC, competition, competition level, keyword difficulty, search intent, alternative search intents, low top of page bid, high top of page bid, words count, detected language, search volume trend, SERP item types, SERP results count, monthly searches, last updated at

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