Semrush MCP vs Ahrefs MCP
Two hosted servers from the two biggest SEO suites. Both bill your agent's calls against API units, so the real question is which data you already pay for.
Semrush MCPSemrush MCP is Semrush's hosted server that gives AI assistants its keyword, backlink, traffic, position-tracking and site-audit data.Full review →
Ahrefs MCPAhrefs MCP is Ahrefs' hosted server that puts Site Explorer, Keywords Explorer, Rank Tracker and Site Audit data in front of your AI assistant.Full review →
HostingRemote, streamable HTTPRemote
Sign-inOAuth 2.1, or an API key header for headless useOAuth with your Ahrefs account
Who can use itQualifying Semrush One, SEO Classic Pro/Guru and Business plansPaid Lite, Standard, Advanced and Enterprise plans
How calls are billedAPI units. The Standard API includes 50,000.API units from your plan's monthly allowance
Data it reachesDomain, organic, keyword, backlink, audience, traffic, paid, shopping, position tracking, site auditSite Explorer, Keywords Explorer, Rank Tracker, Site Audit
Documented tools14, listed in the docs—
Local optionNoneThe old local server is archived and does not accept MCP keys
Choose Semrush MCP if
- You already pay for a qualifying Semrush plan
- You want traffic, audience, paid and shopping data as well as organic
- You need an API-key option for scripts and CI
Choose Ahrefs MCP if
- Your team already works in Ahrefs Site Explorer and Keywords Explorer
- You want Rank Tracker and Site Audit projects reachable from chat
- You're on the Lite plan and want to start there
Bottom line
Neither server is a reason to switch suites. Connect the one whose data you already pay for, and watch API unit usage for the first week. Agents call tools far more often than people run reports.