Keyword Tool vs Semust API

Keyword Tool generates long-tail keyword suggestions from autocomplete when given a seed term. It supports keyword and competitor research across 16 platforms, including Google, YouTube, Bing, Amazon, TikTok, Reddit, Pinterest and Google Trends. The free tool works without an account and can return 750+ Google autocomplete keywords. Paid plans add search volume, cost per click, competition scores, device breakdown and historical trends; they also support search-volume enrichment for up to 1,000 keywords per request, with daily capacity depending on the plan. Access includes the web interface, API and MCP, and Claude, Cursor and ChatGPT are named as compatible assistants. Google coverage includes 190+ countries, 68,000+ locations and 50+ languages. The site says Google and Bing metrics come from planner ecosystems, while volumes for other platforms are modeled estimates based on clickstream signals. Web, API and MCP share a daily request pool, and available MCP tools can vary by endpoint, plan and rollout status. Paid plans start at $68 a month. There is no free trial; the pricing FAQ lists a 30-day money-back guarantee for paid plans.

Semust API is the API offering within Semust, an AI-powered marketing and SEO platform for keyword research, content management, and digital marketing. Its SERP API returns real-time Google result data, including organic listings, ads, People Also Ask, AI Overview, images, and Knowledge Panel information. The Keyword Research API provides search volume, keyword difficulty, CPC, search intent, and related suggestions through one endpoint. Example requests use HTTP headers for API authentication, and the API uses REST. The wider platform lists rank tracking, technical SEO checks, backlink analysis, AI content generation, internal linking, and reporting. Connections include Google Search Console, Google Ads, Google Analytics, Meta Ads, WordPress, Bing Webmaster, and Yandex Metrica. A free Chrome extension can show page outlines, check link status codes, and inspect JSON-LD. The free plan is a 14-day trial without a credit card; paid plans start at $19 a month and have plan-specific credit, tracking, and project limits.