# Keyword Tool API review (2026): is it worth $68 a month, billed yearly? > Keyword suggestion and search volume API across 17 search platforms Checked Oct 23, 2026 ยท graded Oct 23, 2026 by ToolGPA. 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. - **Category:** SERP & SEO Data APIs - **Made by:** Essential Apps LLC and Key Tools Limited - **Website:** https://keywordtool.io/api - **Runs on:** Web - **Who should skip it:** Not for you if you want to try it first, as there's no trial, only a 30-day money-back guarantee. - **Facts last checked:** Oct 23, 2026 ## 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). - **Pricing model:** Paid - **Free plan:** None. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | Starter | $68 per 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 | $148 per 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 | $308 per 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 | $628 per 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 https://keywordtool.io/pro on Oct 23, 2026. Prices change, so confirm with Keyword Tool API before buying. ## Ways to pay less - **Save over 20% with annual billing** (Annual discount): Keyword Tool's pricing lists annual billing at over 20% less: Starter is $68 a month billed annually instead of $88 billed monthly. Source: https://keywordtool.io/pro ## 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. ## Good for - Pulling Google and Bing volumes into your own tools or data warehouse - Long-tail keyword research for YouTube, Amazon and other platforms - Giving AI assistants real keyword data instead of guessed volumes ## 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. ## ToolGPA grades **GPA: 1.8 out of 4**, graded Oct 23, 2026. 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. - **Value for money: C.** Starter 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. - **Free plan and trial: F.** Nothing 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. - **Features: C.** Search 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. - **Ease of use: C.** Judged 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. - **Platforms and integrations: B.** Web, 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. These are ToolGPA's own grades. 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. ## Where it 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. The category's chart of price against score: https://toolgpa.com/charts/seo-data-apis ## Keep it, 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. - You could not: Search volumes for millions of keywords, gathered and kept up to date. - You could not: It plugs into other products, Claude, ChatGPT and Cursor among them, and has an API. - You could not: AI features, unless you pay a model provider for each request yourself. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Claude, ChatGPT, Cursor, Postman **Tags:** Keyword research, Public API, AI features ## Alternatives - [DataForSEO](https://toolgpa.com/tools/dataforseo): Pay-as-you-go APIs for SERP, keyword, backlink and AI mention data. [Compare](https://toolgpa.com/compare/dataforseo-vs-keyword-tool-api) - [KeywordTool.io](https://toolgpa.com/tools/keywordtool-io): Autocomplete keyword ideas from Google and 16 other search platforms. [Compare](https://toolgpa.com/compare/keyword-tool-api-vs-keywordtool-io) - [Keywords Everywhere](https://toolgpa.com/tools/keywords-everywhere): Browser extension that shows search volume on the sites you browse. [Compare](https://toolgpa.com/compare/keyword-tool-api-vs-keywords-everywhere) - [Semrush](https://toolgpa.com/tools/semrush): SEO suite for keyword research, rank tracking and AI search visibility. [Compare](https://toolgpa.com/compare/keyword-tool-api-vs-semrush) - [Google Keyword Planner](https://toolgpa.com/tools/google-keyword-planner): Free keyword ideas, search volumes and bid estimates inside Google Ads. [Compare](https://toolgpa.com/compare/google-keyword-planner-vs-keyword-tool-api) ## Sources The prices, plans, platforms and features above were read from these pages on Oct 23, 2026: - https://keywordtool.io/pro - https://keywordtool.io/api - https://keywordtool.io/mcp/guest Page: https://toolgpa.com/tools/keyword-tool-api Listed by ToolGPA (toolgpa.com).