Keyword Tool API review (2026): is it worth $68 a month, billed yearly?
Keyword suggestion and search volume API across 17 search platforms
Keyword Tool API report card
Weak · out of 4.0 · graded Oct 23, 2026
Best for keyword volumes from Google, YouTube and Amazon
Keyword Tool API gives code access to KeywordTool.io's suggestions from 17 platforms and search volumes for up to 1,000 keywords a request. There's no trial, only Google and Bing volumes come from the ad planners, and Starter's 50 requests a day are shared with the web app and MCP.
Who Keyword Tool API is for
- Fits if you want Google and Bing search volumes pulled into your own tools or warehouse
- Works for long-tail research on YouTube, Amazon and TikTok as well as Google
Who Keyword Tool API is not for
- Not for you if you want to try it first, as there's no trial, only a 30-day money-back guarantee
- Tight if you run many jobs, since Starter's 50 requests a day are shared with the web app and MCP
- Watch out: volumes for platforms other than Google and Bing are modeled estimates, not planner data
- Pricey if you pay monthly, at $88 against $68 on yearly billing
Why Keyword Tool API gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for moneyStarter is $68 a month on yearly billing ($88 monthly) for 50 requests a day, above this category's dearer quarter but short of its dearest tenth. The same plan also covers the web app and MCP.
- FFree plan and trialNothing free for the API: no trial, only a 30-day money-back guarantee, which isn't a trial. A free Guest MCP gives suggestions with volume on the first 5 keywords, but no API access.
- CFeaturesSearch volume for up to 1,000 keywords a request, suggestions from 17 platforms, competitor keywords and a sandbox. The listing's own gap: only Google and Bing volumes come from the ad planners, and the rest are modeled estimates.
- CEase of useJudged on how fast a developer gets a first result: a sandbox base URL and a public OpenAPI 3.1 file for Postman or generated clients. No rating on record, and one daily request pool is shared with the web app and MCP.
- BPlatforms and integrationsWeb, with an API, an MCP server for Claude, ChatGPT and Cursor, and an OpenAPI file for Postman. No desktop or phone app, so B is the top.
What these grades rest on. Graded from this listing, whose facts were read from Keyword Tool's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/keyword-tool-api#review"><img src="https://toolgpa.com/badge/keyword-tool-api.svg" alt="Keyword Tool API: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Keyword Tool API stands among SERP and SEO data APIs
Keyword Tool API's GPA of 1.8 is higher than 0 of the 38 other SERP and SEO data APIs we grade.
It stands best on platforms and integrations (B, above 9 of 38) and worst on free plan and trial (F, above 0).
Its paid plans start at $68 a month, against a middle price of $29.49 for the category: 21 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 8 tools score higher and cost less.
Each grade against the category
Every bar is all 39 SERP and SEO data APIs we grade, cut by the letter each got. Keyword Tool API’s own letter is outlined.
- CValue for moneyAbove 1 of 38, level with 19
- FFree plan and trialAbove 0 of 38, level with 1
- CFeaturesAbove 1 of 38, level with 24
- CEase of useAbove 0 of 38, level with 36
- BPlatforms and integrationsAbove 9 of 38, level with 29
Price against what you get
Each dot is one of 26 SERP and SEO data APIs. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Keyword Tool API, or make your own?
Keep it
To replace Keyword Tool API you would be making search volumes for millions of keywords, gathered and kept up to date. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 38 of the 38 other SERP and SEO data APIs grade higher. It costs $816 a year.
What you could not
- Search volumes for millions of keywords, gathered and kept up to date.
- It plugs into other products, Claude, ChatGPT and Cursor among them, and has an API.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. Keyword Tool API’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Keyword Tool API?
Keyword Tool API gives programmatic access to the data in KeywordTool.io: keyword suggestions mined from the autocomplete of Google, YouTube, Amazon, TikTok, Perplexity and 12 other platforms, search volume for up to 1,000 keywords per request, cost per click and competition, and the keywords Google links to a competitor's URL. It comes with every Keyword Tool Pro plan, sharing one daily request limit with the web app and the MCP server.
Worth knowing
- The API needs a Keyword Tool Pro plan; there is no free trial, but every plan has a 30-day money-back guarantee.
- One daily request pool, from 50 on Starter to 400 on Agency, is shared by the web app, the API and MCP, and resets every 24 hours.
- Only Google and Bing volumes come from the ad planners; the other platforms' volumes are modeled estimates from clickstream data.
- A free Guest MCP gives Google and Bing suggestions with volume on the first 5 keywords, but no API access.
Key features
- Search volume endpoint
- Send 1 to 1,000 keywords per request for monthly volume, a monthly breakdown, cost per click and competition, for one location and language.
- Keyword suggestions from 17 sources
- Autocomplete suggestions, related keywords, questions and prepositions from Google, YouTube, Bing, Copilot, Perplexity, Amazon, TikTok, Reddit and more.
- Competitor keywords
- Pass one URL to get up to 2,000+ keywords Google associates with it, with volume, cost per click and low and high top-of-page bids.
- Deep localization
- Google data for 190+ countries, 68,000+ locations and 50+ languages; Bing planner data for 6 countries, or device data for 32.
- Sandbox and OpenAPI spec
- A sandbox base URL for testing without using quota, and a public OpenAPI 3.1 file for Postman collections or generated clients.
- MCP server
- Connect Claude, Cursor or ChatGPT to the same data through MCP, drawing on the plan's shared daily request pool.
Keyword Tool API pricing
As of Oct 23, 2026, Keyword Tool API is a paid product, starting at $68 per month for 50 requests a day, billed annually ($88 billed monthly).
- Starts at
- $68 per month for 50 requests a day, billed annually ($88 billed monthly)
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Starter | $68per month for 50 requests a day, billed annually ($88 monthly) | Search volume for up to 50,000 keywords a day, 12 months of history, all 17 platforms, web app, API and MCP. |
| Growth | $148per month for 100 requests a day, billed annually ($188 monthly) | Search volume for up to 100,000 keywords a day and 24 months of history. |
| Scale | $308per month for 200 requests a day, billed annually ($388 monthly) | Search volume for up to 200,000 keywords a day and 48 months of history. |
| Agency | $628per month for 400 requests a day, billed annually ($788 monthly) | Search volume for up to 400,000 keywords a day and 48 months of history. |
| Enterprise & Custom | Custom | Higher daily request and keyword limits, custom API and MCP usage, procurement paperwork and bank-transfer payment, after a demo. |
Read from keywordtool.io on Oct 23, 2026. Prices change, so confirm with Keyword Tool API before you buy.
Ways to pay less
- Annual discountSave over 20% with annual billing
Keyword Tool's pricing lists annual billing at over 20% less: Starter is $68 a month billed annually instead of $88 billed monthly.
Stated on keywordtool.io
Works with
Keyword Tool API alternatives
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- Keyword Tool API vs Keywords Everywhere
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- Keyword Tool API vs Semrush
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Common questions
Does Keyword Tool API have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. Keyword Tool API is listed for Web.
Does Keyword Tool API have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. Keyword Tool API is listed for Web.
Is Keyword Tool API open source?
Keyword Tool API is not described as open source on its own site, as read on Oct 23, 2026.
Does Keyword Tool API have an API?
Yes. Keyword Tool API offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 23, 2026.