ChatGPT MCP Integration

Similarweb is available as an official app in ChatGPT. Once connected, ChatGPT can access Similarweb's digital intelligence data directly within your conversations.

Ask questions in plain language and get answers backed by real traffic, audience, keyword, and app data. No switching tabs, no exports, no manual lookups. The connector handles everything behind the scenes; all you do is authenticate once and start asking.

With Similarweb connected, ChatGPT draws on 85+ data endpoints covering web analytics, competitive intelligence, audience demographics, app performance, keyword rankings, and more.

Who Has Access

The Similarweb app for ChatGPT is available across all paid ChatGPT plans (Plus, Pro, Business, and Enterprise). To activate the connector, you also need an active Similarweb subscription with API access. This includes:

• Business and Enterprise plan subscribers, where API access is included as part of your plan.
• API standalone package subscribers, where full connector access is included.

Data access through the connector mirrors your existing Similarweb subscription. Access is scoped to the specific datasets, regions, and historical ranges included in your plan.

Interested in getting access? Contact Similarweb Sales to learn more about plan options and available datasets.

How to Connect

The Similarweb app is available natively inside ChatGPT. No third-party tools or manual server setup required. Follow the steps below to get connected.

Step 1: Open the Apps directory

1. Open ChatGPT in your web browser or launch the ChatGPT desktop application.
2. In the left-hand sidebar, click Apps.
3. The Apps directory opens, where you can browse and connect to available integrations.

Step 2: Find the Similarweb app

1. In the Apps directory, use the search bar to look for Similarweb.
2. Click the Similarweb card to open the connection setup.

Step 3: Authenticate with your API key

Authentication is handled via your Similarweb API key, the same key used to access the Similarweb API.

1. Click Connect on the Similarweb app page.
2. You'll be redirected to a Similarweb authentication page.
3. Enter your Similarweb API key when prompted.
4. Confirm to complete the setup.

Once authenticated, the app will show as connected and is ready to use across all your conversations.

Using Similarweb in your conversations

Once connected, ChatGPT can call the Similarweb app whenever your question requires digital intelligence data. There are two ways to trigger it:

• Ask explicitly. Mention Similarweb in your prompt, for example: "Use Similarweb to compare the traffic of Booking.com and Expedia."
• Ask in context. Even without naming Similarweb, ChatGPT will detect when your question needs traffic, audience, or competitive data and activate the connector automatically.

Use Cases

The Similarweb app gives ChatGPT access to 85+ data endpoints across web, app, search, and shopper intelligence. Below are examples of what you can ask, organized by dataset.

Traffic & Engagement

"How has openai.com's traffic grown over the past 12 months? Break it down by month and show me total visits, unique visitors, and average visit duration."

Use this to track competitor momentum, validate market expansion, or benchmark your own site's growth against the category.

Marketing Channel Mix

"What does Booking.com's traffic channel breakdown look like? Compare direct, organic search, paid search, social, referrals, and email for the last 3 months."

Use this to reverse-engineer competitor acquisition strategies and identify which channels they're investing in.

Audience Demographics & Interests

"What does the audience of nytimes.com look like in terms of age, gender, and top interests? How does it compare to washingtonpost.com?"

Use this to inform persona development, ad targeting, and content positioning decisions.

Keyword & SEO Performance

"Show me the top 20 keywords driving organic traffic to shopify.com. Include search volume, position, and traffic share."

Use this to surface high-value keywords competitors are ranking for and uncover SEO opportunities.

App Performance

"How many monthly active users does the Instagram Android app have globally? Show the trend over the past 6 months alongside session count and average session duration."

Use this to benchmark app performance, track competitor growth, and evaluate market readiness.

Shopper Intelligence

"What are the top-selling brands in the 'running shoes' category on Amazon US in the last quarter? Show units sold and average selling price."

Use this to monitor e-commerce category dynamics, benchmark brand performance, and identify market share shifts.

FAQ

Authentication

Where do I find my Similarweb API key?

Log in to the Similarweb platform, go to Account Settings → Data Tools → REST API. You can copy your existing key or generate a new one. If you don't see this section, your subscription may not include API access. Contact your account manager to confirm.

Can I use the same API key across multiple AI platforms?

Yes. The same API key works across every platform where the Similarweb connector is available (ChatGPT, Claude, Manus, and others). Usage from all sources is counted against your overall API credit allocation.

Do I need to re-authenticate periodically?

No. Once connected, the integration remains active. You only need to re-authenticate if you regenerate your API key in the Similarweb platform.

Data & Querying

Why doesn't ChatGPT pull Similarweb data for some of my questions?

ChatGPT decides when to call the app based on the context of your question. If the question doesn't clearly require web, app, or competitive intelligence data, it may answer from general knowledge instead. To force the connector, mention Similarweb explicitly in your prompt.

Which countries and date ranges are available?

Both depend on your Similarweb subscription. Country coverage and historical depth are aligned with the datasets included in your plan. Refer to your subscription details or contact your account manager for the full scope.

Why are the results different from what I see in the Similarweb platform?

Make sure you're querying the same country, date range, and web source (desktop, mobile, or total) in both places. Slight differences in aggregation methodology between the platform and the API can account for minor variances. For data fidelity questions, contact Similarweb support.

Credits & Cost

Does using the Similarweb app consume API credits?

Yes. Every query through the app consumes API credits from your Similarweb subscription, just like a direct API call. The number of credits consumed depends on the volume of data returned. More granular queries (daily data over long ranges, multi-metric requests) consume more credits than simpler lookups.

Where can I monitor my API credit usage?

Your API credit consumption is visible in the Similarweb platform under Account Settings → Data Tools → REST API. This reflects credits consumed across all API channels, including the ChatGPT app. You can also ask ChatGPT “how many credits did this promp/question consume?” and ChatGPT will return a breakdown of the credit costs of the specific interaction. Asking this question doesn't cost extra credits.

What happens if I run out of API credits?

Once your allocation is exhausted for the billing period, queries will return an error. Contact your Similarweb account manager to discuss increasing your credit limit or upgrading your plan.

Is there a way to minimize credit consumption?

Be specific in your prompts. Narrower date ranges, fewer metrics per query, and monthly (rather than daily) granularity will all consume fewer credits.

Troubleshooting

The app shows as connected but ChatGPT isn't returning Similarweb data.

Mention Similarweb explicitly in your prompt to force the app to activate. If it still doesn't work, try disconnecting and reconnecting the app, then re-entering your API key.

I'm getting an authentication error.

Verify that your API key is correct and active. Regenerate the key in the Similarweb platform if needed, then reconnect the app.