SEMrush

SEO and competitive analysis platform for keyword research and site audits.

Capabilities

Integration	Available	Notes
API	✓	Analytics API, Projects API
MCP	-	Not available
CLI	-	Not available
SDK	-	API-only

Authentication

• Type: API Key
• Parameter: key={api_key} in query string
• Get key: My Profile > API in SEMrush dashboard

Common Agent Operations

Domain overview

GET https://api.semrush.com/?type=domain_ranks&key={api_key}&export_columns=Db,Dn,Rk,Or,Ot,Oc,Ad,At,Ac&domain=example.com

Organic keywords

GET https://api.semrush.com/?type=domain_organic&key={api_key}&export_columns=Ph,Po,Pp,Pd,Nq,Cp,Ur,Tr,Tc,Co,Nr&domain=example.com&database=us&display_limit=100

Keyword overview

GET https://api.semrush.com/?type=phrase_all&key={api_key}&export_columns=Ph,Nq,Cp,Co,Nr&phrase=keyword&database=us

Related keywords

GET https://api.semrush.com/?type=phrase_related&key={api_key}&export_columns=Ph,Nq,Cp,Co,Nr,Td&phrase=keyword&database=us&display_limit=50

Keyword difficulty

GET https://api.semrush.com/?type=phrase_kdi&key={api_key}&export_columns=Ph,Kd&phrase=keyword&database=us

Backlinks overview

GET https://api.semrush.com/?type=backlinks_overview&key={api_key}&target=example.com&target_type=root_domain

Backlinks list

GET https://api.semrush.com/?type=backlinks&key={api_key}&target=example.com&target_type=root_domain&export_columns=source_url,source_title,target_url,anchor&display_limit=100

Competitors

GET https://api.semrush.com/?type=domain_organic_organic&key={api_key}&export_columns=Dn,Cr,Np,Or,Ot,Oc,Ad&domain=example.com&database=us&display_limit=20

Response Format

Responses are CSV by default. Add &export_escape=1 for proper escaping.

Export Columns

Domain Report

• Db - Database
• Dn - Domain
• Rk - Rank
• Or - Organic keywords
• Ot - Organic traffic
• Oc - Organic cost

Keyword Report

• Ph - Phrase/keyword
• Nq - Search volume
• Cp - CPC
• Co - Competition
• Kd - Keyword difficulty
• Nr - Number of results

Backlinks

• source_url - Linking page
• target_url - Target page
• anchor - Anchor text
• source_title - Page title

Databases

Use country code: us, uk, de, fr, ca, au, etc.

When to Use

• Keyword research
• Competitive analysis
• Backlink analysis
• Site audits
• Rank tracking
• Content gap analysis

Rate Limits

• Varies by plan (10-30K units/day)
• Each API call costs units

Relevant Skills

• seo-audit
• programmatic-seo
• content-strategy
• competitor-alternatives