This profile is part of our MCP server directory, within The MCP Guide. Profiles are checked against each vendor's own documentation. Need a server built? See MCP development.
The Similarweb MCP server lets an AI app pull Similarweb's market data, such as competitor traffic, audience overlap, search players and app rankings, into a chat. Similarweb hosts the server. You connect it with a Similarweb API key from a plan that includes API access.
Checked against: Similarweb MCP documentation on 28 October 2026. eSEOspace did not install or test this server.
For how competitor data fits wider search work, read MCP for SEO.
Key Takeaways
- Similarweb lists its MCP endpoint as
https://mcp.similarweb.com. - You need a Similarweb subscription with API access (API-only, Business or Enterprise) and an active API key.
- MCP calls use the same data credits as standard API calls, and complex queries use more.
- Similarweb announced the server on 25 September 2025 and names Claude, Cursor, Copilot, Zapier and n8n as clients.
- Similarweb's docs warn that use of the server and AI outputs "is at the user's sole risk."
At a glance
| Item | Detail |
|---|---|
| Publisher | Similarweb |
| Official? | Yes |
| Hosting | Remote URL: https://mcp.similarweb.com |
| Transport | Not stated on the docs page |
| Sign-in | Similarweb API key |
| Read or write | Read (data retrieval tools) |
| Price | Needs a plan with API access; uses data credits; no separate MCP price listed |
| Source code | Closed |
| Status | Not stated |
What it can do
Similarweb's docs list tools by data area. The names below are as Similarweb writes them, not code-style identifiers:
- Website traffic: Traffic and Engagement, Traffic Sources, Website Rank, Subdomains, Geography, Traffic by Demographics, Segment Traffic and Engagement, Segment Traffic Sources.
- Competitive and audience: Similar Sites, Referrals, Audience Interests, Audience Overlap, Deduplicated Audience, Demographics.
- Content and ads: Leading Folders, Popular Pages, PPC Spend, Ad Networks, Technologies.
- Search: SERP Players, SERP Clicks.
- Apps: App Install Penetration, App Store Rank, App Details.
Each tool returns metrics such as visits, bounce rate, rank, audience overlap or app rank. The launch post sums it up as "traffic, keyword, competitor, and audience insights at scale."
How to connect it
Similarweb's MCP docs say the server "is pre-configured and ready to use." The main docs page gives the endpoint but no config file or command. It links to separate guides for Claude Desktop and Cursor and lists Microsoft Copilot, Zapier and n8n as supported. For other MCP tools, Similarweb directs you to its support team.
What you need before you start, per the docs:
- A Similarweb plan with API access (API-only, Business or Enterprise).
- An active API key from your account dashboard.
- An MCP-compatible client, such as Claude Desktop or Cursor.
The launch post says non-technical users can "simply connect your Similarweb API key" in Claude or Zapier, and that "no coding is required." We did not copy a config snippet because the main docs page does not show one. Use the client guide Similarweb links for your app.
Security notes
- Protect the API key. It is your access to paid data credits. Keep it out of shared files and screenshots. See MCP secret leakage.
- Credit spend. Every MCP call draws data credits. A broad prompt that pulls several data types costs more, per Similarweb.
- Accuracy disclaimer. Similarweb says outputs may be "incomplete, inaccurate, subject to omissions, or contextually limited," and it disclaims liability for decisions based on them. Check key numbers in the Similarweb app before you report them.
- Read-only tools. The documented tools retrieve data; none are described as changing your account.
Our MCP security hub covers how to vet hosted servers before you connect them.
Alternatives
- Semrush MCP server: SEO and Trends API data, which covers traffic estimates.
- Ahrefs MCP server: backlinks, keywords and Brand Radar.
- Google Analytics MCP server: your own first-party traffic data.
Next step
Competitor data is most useful next to your own analytics. Our MCP for marketing teams guide shows how to combine sources, and MCP marketing covers how we help teams roll this out.
Frequently asked questions
Which Similarweb plans include MCP access?
Similarweb's docs say you need a subscription with API access: API-only, Business or Enterprise. You also need an active API key. The docs do not list a separate MCP price.
Does the Similarweb MCP server use credits?
Yes. Similarweb says MCP uses the same data credits as standard API calls. Queries that pull several data types consume more credits.
Does it work with ChatGPT?
The September 2025 launch post said ChatGPT support was "coming later this year." The current docs page lists Claude Desktop, Cursor, Microsoft Copilot, Zapier and n8n. Check Similarweb's docs for the latest list.
Can I trust the numbers the AI gives me?
Similarweb warns that AI outputs may be incomplete or inaccurate. Use the server for fast research, then confirm figures in Similarweb before you share them with clients or leadership.
