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The calculated fair value for your AI, instead of a guessed number

Ask an AI what a stock is worth and it estimates. With Fair Value Calculator it fetches the answer from us: calculated daily, for 35,000+ stocks worldwide.

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Free. An account is enough, no card.

35,000+stocks worldwide
26valuation models per stock
69criteria per stock
Dailyrecalculated

Why this makes a difference

Without the connection

The AI answers from memory. The price is old, the fair value is an estimate, and each time you ask you get a different number.

With Fair Value Calculator

The AI fetches the current valuation and names the source. The same number as on our site, calculated from 26 models and audited financials.

What an answer looks like

Is Apple over- or undervalued right now?
According to Fair Value Calculator, Apple's fair value is $346.58 against a price of $333.69. That is a gap of +3.9%, so the stock counts as near fair value. Quality: 82 out of 100. Today's numbers from Fair Value Calculator. The wording comes from the AI. Not investment advice.

In three steps

Pick your appClaude, ChatGPT, Cursor, VS Code, Claude Code or Codex. Each has its own short guide.
Sign in onceWith your Fair Value Calculator account. A free one is enough, you confirm with one click.
Just askThe AI recognises by itself when it needs Fair Value Calculator and names it as the source.

Connect your app

Claude In the Claude directory, one click Guide → ChatGPT In a browser on a computer, about 2 minutes Guide → Claude Code One command, then sign in Guide → Cursor One click, then sign in Guide → VS Code One click, then sign in Guide → Codex One command, then sign in Guide →
Another app with MCP? Enter this server URL and sign in with your account. https://www.fairvalue-calculator.com/mcp

What you can ask

Is Apple over- or undervalued right now?
Compare Microsoft, Alphabet and Meta by fair value and quality.
Which European tech stocks are undervalued with high quality?
How far is Nestlé from its fair value?
Which stock on my watchlist is overvalued by now?
Put the two best of them on my watchlist and turn the alert on.

Ten functions, explained exactly

You do not need to know any of them. You ask in your own words and your AI picks the right function.

Ask for valuations

Find a stockFree
A name, ticker or ISIN becomes the right listing, in the same order as the search on the site. Up to five matches. You ask: „Find Siemens."
Fair value verdictFree
The fair value per share with its currency, the distance to the price, the verdict (under-, fairly or overvalued), the quality score and the data level, plus the link to the full analysis. You ask: „What is Apple worth?"
Quick snapshotFree
Verdict, distance in bands and quality of one stock, without the exact number. For a quick look at many stocks. You ask: „Is Nestlé roughly expensive or cheap?"
Screen for undervalued stocksFree
Stocks that match your criteria right now: minimum distance to fair value, minimum quality, sector, region (US or Europe). Sorted by quality. You ask: „Which European tech stocks are undervalued?"
Compare stocksFree
Several stocks side by side with the same values. Free: two stocks as snapshots, with Pro up to five with fair value. You ask: „Compare Microsoft, Alphabet and Meta."

Your watchlist and your alert

These functions work on your account. Your AI only changes something when you explicitly ask for it, and tells you afterwards what it did. You agree to this separately when connecting.

Show my watchlistFree
Your saved watchlist with today's verdict, distance and quality of each stock, plus whether your email alert is on. You ask: „How does my watchlist look right now?"
Add stocks to the watchlistPro
Adds up to ten stocks per request to your watchlist. What is already on it stays unchanged. From then on the alert and the weekly briefing follow these stocks. You ask: „Put Coca-Cola and PepsiCo on my watchlist."
Remove stocks from the watchlistPro
Removes up to ten stocks per request from your watchlist. The previous list is kept on our side as a backup. You ask: „Take Intel off my watchlist."
Turn the email alert on or offPro
Turns the email alert for your whole watchlist on or off. The alert arrives when the verdict of one of your stocks tips from hold to sell. There are no price-target alerts. You ask: „Turn on my watchlist alert."
Stocks that fit my portfolioPro
Suggests up to eight stocks that fit your watchlist: below their fair value, high quality, and ranked by their measured correlation with your stocks. The same optimizer as on the site. You ask: „What would diversify my watchlist?"

Free and Pro

Per day and functionFreePro
Full verdicts with fair value350
Quick snapshots and search30300
Stocks per comparison25
Matches per screen320
Show the watchlist✓✓
Change the watchlist–✓
Switch the email alert–✓

Your plan with us is what counts. A ChatGPT or Claude subscription does not change it. See Pro

What our 3,931 users say

★ 4.1 on Trustpilot →
  • Trustpilot ★★★★★
    “This tool is great. I use it every time I want to buy a stock or study a stock. You get a valid calculation if you're buying an over- or undervalued stock. A perfect tool.”

    Samad Golzari, GermanyAug 2026

  • Email
    “Impressive how quickly you implemented that. Thank you, that really helps me.”

    DanielAug 2026

  • Instagram
    “That was a super quick fix, Peter. Amazing. Your application is a gem for a beginner like me.”

    Hemant P., IndiaAug 2026

  • Trustpilot ★★★★★
    “I've been using this service and I'm very impressed with its accuracy. It has helped me make better investment decisions and achieve good results. I'm looking forward to future updates and improvements. I definitely recommend giving it a try, especially if you don't have enough time or extensive knowledge about investing.”

    Alireza Fasih, AustriaAug 2026

  • Forum
    “The interface is really well done, despite all the information it holds.”

    MatthesAug 2026

  • Forum
    “Cool tool, I hadn't come across it before. Impressive.”

    Lever H.Aug 2026

  • Forum
    “Even with a great deal of information available, it comes across as quite clear and easy to understand.”

    hattifnattJul 2026

  • Trustpilot ★★★★★
    “Amazing Tool. Quick & easy. Exactly what I was looking for! Chapeau! I would recommend it to everyone!”

    Gunther Hingsammer, AustriaJul 2026

Frequently asked

What is this exactly?

A connection (MCP) between your AI app and Fair Value Calculator. When you ask your AI about a stock, it fetches the fair value, quality and verdict from us instead of estimating something itself.

What does it cost?

Nothing. A free account is enough and gives you 3 full verdicts a day. Pro raises the limit to 50 a day.

Does the AI compute the fair value itself?

No. It receives the number from us and explains it. The calculation runs on our side, daily, from 26 valuation models.

Which apps work?

Claude, ChatGPT, Claude Code, Cursor, VS Code and Codex each have their own guide. Any other app with MCP works with the server URL.

What data goes to the AI?

Only the result for your question. No raw data and no model weights. Your AI sees your watchlist only if you allow it when connecting, and then without share counts, entry prices and notes.

Can the AI change my watchlist?

Only with Pro, only if you allow it when connecting, and only on your explicit request. It can add and remove stocks. Before every removal we back up the previous list.

What exactly does the alert do?

It covers your whole watchlist. You get an email when the verdict of one of your stocks tips from hold to sell. Your AI can turn it on and off. There are no price-target alerts.

I am already connected. What do I need to do?

Nothing for valuations. For watchlist and alert, disconnect once and connect again, because you have to agree to the new permissions.

Can I disconnect again?

Yes, any time in your account under "Connected AI assistants".

Is this investment advice?

No. It is a valuation by fixed rules, not a recommendation.

Give your AI the right number

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