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AppleNVIDIABerkshireMetrics guide
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Private beta Three companies, in full. Members open every company, Super Investors’ portfolios, ETFs, earnings calls and the earnings calendar.

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Private beta · MCP

Ask Claude or Codex about any company

Connect Mr. Market to your AI assistant and it can read the same research you see here — SEC statements and filings, institutional holders, Super Investors, ETFs, the screener, prices, news and analyst estimates — and cite where every number came from. It can only read; it never changes anything.

  • No keyssign in with your account
  • Read-only25 research tools
  • Claude · ChatGPT · Codexand Claude Code

Every app, every tool and ready-made research workflows: the full docs.

  1. 1

    Add Mr. Market to your assistant

    Pick your app and add this address. That’s the only thing to paste.

    1. a
      In Claude (claude.ai or the desktop app) open Settings → Connectors and choose Add custom connector.
    2. b
      Name it Mr. Market and paste this address:
      https://mrmarket.fyi/mcp
    3. c
      Choose Connect. Mr. Market’s sign-in opens; sign in and choose Allow.
  2. 2

    Sign in and allow

    Your assistant opens a Mr. Market page. Sign in with the account you use here and choose Allow; the assistant gets its own read-only access, never your password.

    You need a Mr. Market account first. Create one or sign in.

  3. 3

    Ask in plain words

    Start a new chat. Mentioning mr-market the first time helps the assistant pick the right tools. If it asks permission to use a Mr. Market tool, allowing it is safe: every tool only reads.

    Using mr-market, how have Apple's revenue and net income changed over the last four years? Cite the filings.
    Using mr-market, which super investors hold Costco, and how big is each position?
    Using mr-market, screen for companies with revenue growth over 30% and positive operating cash flow.
    Using mr-market, compare NVIDIA, AMD and Broadcom on gross margin and free cash flow.
    Using mr-market, when does Microsoft report next, and what do analysts expect?
    Using mr-market, what did management say about margins on Costco's latest earnings call?

What it can look up

  • Financial statementsIncome, balance sheet, cash flow and key ratios, period by period, with the filing behind every number.
  • FilingsList 10-Ks, 10-Qs and 8-Ks, read them in pages, and search the full text of EDGAR since 2001.
  • Earnings callsSaved call transcripts, speaker by speaker, and a search across every company's calls.
  • Ownership13F institutional holders, Super Investor portfolios and history, and insider trades.
  • Screener and peersScreen on the latest quarter, find industry peers and compare up to four companies.
  • Growth & QualityThe composite score, its 31 metrics and how each was measured.
  • Market dataQuotes, prices, news, price targets, earnings dates, dividends, splits and analyst estimates.
  • Macro and industriesFRED and Treasury series, the economic calendar, and ranked theme and industry boards.
  • ETFsThe ETF catalog and each fund's holdings from N-PORT filings.
  • SegmentsRevenue by business and geography, as each company reports it.

Good to know

Sources
Numbers come from SEC filings and keep their period, filing and link. Quotes, news and estimates come from market data providers and can be delayed. It’s research, not financial advice.
Your access
Each assistant you connect gets its own read-only access for 90 days, then asks you to sign in again. Disconnect any of them in Account; it stops at once.
Limits
About 20 tool calls a minute and 300 a day per connection; analyst estimates allow 4 lookups a day. Limits reset at midnight UTC. Ask the assistant to “call about” to see what’s left.
Not included
Saved lists and notes, and companies outside the saved universe.

If something goes wrong

You seeDo this
The sign-in page says the request expiredStart connecting again from your assistant; a request waits ten minutes.
Asked to sign in againThe connection expired after 90 days or was disconnected. Sign in and allow once more.
“Too many requests”Wait a minute, or until the daily reset.
Temporarily unavailable, or 503The research server is briefly offline. Try again in a few minutes.
Remove itDisconnect it in Account, then remove it from the app (claude mcp remove mr-market --scope user or codex mcp remove mr-market).