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Similarweb

Similarweb data for your AI agent. No contract.

Visits, traffic sources, paid-search spend and competitors for any website, called from Claude, ChatGPT, Cursor or Codex. No Similarweb account and no API key of your own: top up once, and your agent is told the price of each call before it runs.

Create an accountSet it up in your agent

New accounts start with $1.00 free.

Top up more, get more

  • +5%from $75
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Works in

  • Claude
  • ChatGPT
  • Claude Code
  • Codex
  • Cursor
A real run: three Similarweb calls about stripe.com and what each one cost.
Asked in Claude Code

How big is stripe.com, and how much of it is bought?

  • Visits$0.90

    16.6M

    73% bounce · 1.7 pages per visit

  • Traffic sources$1.58

    8.2% paid

    63% direct · 19.5% organic search

  • Paid search$0.23

    $3.9M

    modelled spend for the month

Three calls

$2.70

No contract

Similarweb estimates, worldwide, September 2026. Retrieved through toolfare on 19 October 2026.

1Connect your AI app

Pick the app you use. You do this once, and every API on toolfare is then available in it.

Add toolfare as a connector in Claude

Add to Claude
https://api.toolfare.ai/mcp
  1. 1Open Customize → Connectors and choose "Add custom connector".
  2. 2Paste this URL as the remote MCP server URL.
  3. 3Leave the OAuth client id and secret under Advanced settings empty.
  4. 4Complete the browser authorization, then return to your conversation.

Custom connectors are available on Free, Pro, Max, Team and Enterprise. A Free account may hold one custom connector in total.

Claude’s own instructions

2What to ask

Copy a prompt into your AI app once you’re connected. It picks the right one of the 19 tools and tells you the price first.

  • One month of a site’s traffic, in one call

    $0.90 for stripe.com on 19 October 2026.

    Visits, bounce rate, pages per visit and average visit duration for the last closed month — the cheapest way to size a site.

    • “How much traffic did stripe.com get last month?”
    • “How engaged are this competitor’s visitors?”

  • Visits and engagement over time

    The core traffic series for any domain — visits, bounce rate, pages per visit and average visit duration, month by month.

    • “How much traffic does stripe.com get, and is it growing?”
    • “Compare our traffic against this competitor over the last three months.”

  • What they spend on paid search

    $0.23 for one month of stripe.com on 19 October 2026. Quoted at up to $0.68 before it runs.

    Modelled monthly PPC spend for a domain, in USD — the single number that says how seriously a competitor buys traffic.

    • “How much does this company spend on Google Ads each month?”
    • “Is this competitor buying their growth or earning it?”

  • Where their traffic actually comes from

    $1.58 for one month of stripe.com on 19 October 2026. Quoted at up to $4.73 before it runs, then charged what the call settled at.

    Visits split across acquisition channels — direct, organic search, paid search, display, social, referral, email.

    • “Where does this site’s traffic come from?”
    • “Do they rely on SEO or on paid?”

  • Global and category rank

    A domain’s position worldwide or in its market, plus the category Similarweb files it under.

    • “What is this site’s ranking, and in which category?”
    • “Which category does Similarweb put this company in?”

  • Their closest competitors, by audience

    The competitive set Similarweb derives from overlapping audiences, rather than from a keyword list.

    • “Who does Similarweb consider this site’s closest competitors?”
    • “Build me a competitive set for this domain.”

  • Which ad networks send them display traffic

    Incoming display traffic broken down by the network delivering it.

    • “Which ad networks send this site its display traffic?”
    • “Are they buying display, and through whom?”

  • Who competes for the same keywords

    From $0.23 for ten competitors.

    The domains sharing a site’s search footprint — competitors by keyword overlap rather than by audience.

    • “Who competes with us for the same search keywords?”
    • “Which domains share this site’s search footprint?”

Also available (11): The visits trend for the recent months · Which countries a website’s traffic comes from · A website’s most visited pages · Which pages a website lands its search traffic on · The sites sending a website its referral traffic · How traffic splits across a website’s subdomains · What else a website’s audience is into · Cross-device audience, deduplicated · The top-ranked websites in a category · Who owns the results page for a keyword · Who wins a keyword’s clicks, month by month

Samples

Real calls made through toolfare: the question, and what came back. Responses are trimmed, never edited.

  • How much traffic did stripe.com get last month?

    {
  "data": {
    "domain": "stripe.com",
    "metrics": {
      "average_visit_duration": 58.606805160998675,
      "bounce_rate": 0.7292136338671167,
      "pages_per_visit": 1.6998086695658996,
      "visits": 16550410.803594217
    },
    "month": "2026-09"
  },
  "meta": {
    "country": "ww",
    "start_date": "2026-09",
    "end_date": "2026-09",
    "granularity": "monthly",
    "source": "similarweb"
  }
}

    aisa_website_traffic_snapshot28 Oct 2026

  • How much does Stripe spend on Google Ads each month?

    {
  "meta": {
    "request": {
      "domain": "stripe.com",
      "country": "ww",
      "start_date": "2026-08-01",
      "end_date": "2026-08-31",
      "web_source": "total"
    },
    "status": "success",
    "last_updated": "2026-09-30"
  },
  "data": [
    {
      "date": "2026-08-01",
      "currency": "usd",
      "ppc_spend": 4831143.16
    }
  ]
}

    aisa_website_ppc_spend28 Oct 2026

What it takes to get the same answer from Similarweb

Similarweb sells its API, and the AI connector built on it, through its sales team. These are the public figures.

Buying the Similarweb API

  • Not on the pricing page: API access comes in a custom package from sales. similarweb.com
  • $10,000 a year, paid up front, for the smallest package listed publicly: 50,000 API credits a month on a 12-month contract. AWS Marketplace
  • $37,800 a year is the median contract across 157 purchases. Vendr
  • Unused credits expire at the end of each billing cycle. Similarweb docs
  • Similarweb’s own MCP server needs an API-only, Business or Enterprise plan. Similarweb docs

Through toolfare

  • Most calls cost $0.23 to $1.60. Your agent sees the price before each one runs.
  • Top up from $3. Your balance doesn’t expire.
  • No contract, no sales call, no Similarweb account.
  • A call that fails costs nothing.

Public figures checked on 19 October 2026.

Use it when

  • You want to size a competitor — how much traffic they actually get, and whether it is growing or shrinking.
  • You want to know whether a competitor’s growth is bought or earned, and roughly what that costs them.
  • You want an acquisition mix: the fastest read on whether an incumbent is an SEO shop, a paid shop or a household name people go to directly.
  • You are qualifying a partner, acquisition target or advertiser and need an independent read on their scale.
  • You want engagement quality, not just volume — a high bounce rate on rising visits usually means paid traffic.

Look elsewhere when

  • You want your OWN traffic. Google Analytics has it exactly, and reading your own account costs nothing; Similarweb only models it. Use this instead
  • You need a per-country breakdown. This gateway reports worldwide figures only — per-market drill-down is not available at any price.
  • You need last week’s numbers. Data lags about a month, and most endpoints reach back only about three closed months (the visits trend reaches about six).
  • You need keyword-level or campaign-level spend. PPC spend is one modelled total per month, not a breakdown.
  • You need exact figures for billing or a contract. Every number here is an estimate, and Similarweb says so.

One account, many research tools

One connection gives your AI the sources a marketing answer actually needs.

A useful marketing question rarely lives in one tool. Ask in Claude, ChatGPT, Codex or Cursor and toolfare can combine traffic, search, ads, app-store, social and creative context in the same conversation, instead of asking you to connect each source one by one.

  1. 1

    Size the market and the competitor

    Ask how much traffic a competitor gets, where it comes from, how much paid search contributes, and which adjacent sites belong in the same competitive set.

  2. 2

    Explain why they are getting found

    Move from traffic volume into the search layer: keywords, backlinks, SERP players, trends and AI visibility, so the agent can explain what is driving the visits.

  3. 3

    Read app-store demand when the market is mobile

    Bring app keywords, ranking signals and review context into the same research flow instead of treating mobile discovery as a separate analysis.

  4. 4

    See what competitors are actually running

    Check live and historical ad creative across search, display, video and social libraries before deciding what angle, format or campaign to test next.

Similarweb directly, or through toolfare

Directly

  • Not on the pricing page: API access comes in a custom package from sales. similarweb.com
  • $10,000 a year, paid up front, for the smallest package listed publicly: 50,000 API credits a month on a 12-month contract. AWS Marketplace
  • $37,800 a year is the median contract across 157 purchases. Vendr
  • Unused credits expire at the end of each billing cycle. Similarweb docs
  • Similarweb’s own MCP server needs an API-only, Business or Enterprise plan. Similarweb docs

Through toolfare

  • Per call, quoted before it runs, on the same balance as everything else
  • No vendor account of your own and no key to hand to an agent
  • Reachable from any MCP client, in the chat you are already in

You get the endpoints that work through this gateway, reported worldwide only, with no per-market drill-down and a history measured in a handful of recent months. If you need country-level reporting, older history or the complete Similarweb API surface, buy it directly — toolfare will not get you there.

Limits

  • Reports are worldwide only — any country code, US included, is rejected outright, so there is no per-market drill-down. (You can still ask which countries a site’s traffic comes from; you cannot ask for a report on one of them.)
  • Most endpoints cover roughly the last three closed months, with data lagging about a month. The ready-made visits trend is the exception — it defaults to about six.
  • Every endpoint here was called against the live gateway and returned data. Any gateway endpoint that fails with every documented parameter supplied is deliberately withheld — a tool that cannot be called is worse than no tool.
  • Pay as you go from your toolfare balance, in US dollars; there is no subscription. A call runs when your balance covers its quote.
Similarweb documentation

Questions

Yes. toolfare calls Similarweb’s data through a licensed Similarweb API reseller and passes the response to your agent with its source and date. toolfare is not affiliated with Similarweb.

No. toolfare holds the vendor account. Your agent signs in to toolfare once and calls through it.

Before a call runs, your agent gets a quote and a cap. The call is charged what the gateway settled for it, never more than the cap you accepted. Quotes and charges are in US dollars.

New accounts start with $1.00 free, enough for a paid-search or keyword lookup. After that, top-ups start at $3, and your balance doesn’t expire.

Claude, ChatGPT, Claude Code, Codex, Cursor and any other client that speaks MCP, plus a command-line tool for agents that run commands.

Ahrefs, ad libraries, TikTok and app-store data, web search and scraping, Seedance video and more, on the same balance.

Ask your first question today.

Create an account, connect your agent and ask about any website. Each call is quoted before it runs.

Create an account

Similarweb is a trademark of Similarweb Ltd. toolfare is not affiliated with, endorsed by or sponsored by Similarweb. Data is provided through a licensed Similarweb API reseller.