How to Get Semrush API Easily 2026

A plain search for "semrush" is the safest starting point — Google often surfaces extra context alongside the listing, including SEO Difficulty scores and quick actions to run an SEO report through tools like ChatGPT, Claude, Gemini, or Deepseek if you have an SEO browser extension installed. None of that is required for API access, but it's a reminder that the official semrush.com domain is where account and billing settings actually live, not a third-party tool.

Open your account icon and go to Subscription Info to see your current plan's toolkit breakdown. API access is typically listed as a feature of higher tiers — in the SEO Toolkit comparison, it shows up under a Guru-level plan alongside things like Extended limits and Migration from third-party tools, while a lower Pro plan includes Position Tracking, Backlink Analysis, and Site Audit but not API access on its own. Confirm this against your specific plan before assuming you're covered.

Semrush lays this out plainly: upgrade to a Business-level subscription plan, purchase an API package sized to your needs, then get your API key. It's worth reading in this order because skipping straight to "get a key" without the right plan or a purchased unit package just leads to a key that can't actually pull data yet.

Head to Subscription Info and open the API Units tab, where your current balance and available packages are listed together — options here typically range from a 2 million unit package up to 20 million, each with its own monthly cost. Different request types consume different amounts of units, so a rough estimate of your expected call volume before buying saves you from either running out mid-project or overpaying for headroom you won't use.

Underneath the unit packages on that same API Units tab is the API key itself, partially masked with a Copy button next to it. This is the credential you'll pass with every request to authenticate against Semrush's Traffic Analytics, Keyword, and other APIs — treat it like a password, since anyone with the key can draw down your purchased units.

Before building anything complex, send one simple request — a keyword overview or domain summary call is a good first test — using your API key to confirm authentication works and units are deducting as expected. Semrush's documentation covers the exact endpoint structure and parameters for each report type once you're past this initial check.

Return to the API Units tab periodically to watch your balance, especially if you're running scheduled jobs rather than one-off pulls. Running out mid-cycle means requests start failing until you buy more units or your plan's allocation refreshes, so it's worth building a usage buffer into whatever you're automating rather than cutting it close to the limit.