XOOMAR market data MCP Server

by xoomar Your server? Claim it

answering

XOOMAR market data is answering right now. Last checked 9 min ago. 788 installs a week from npm. It exposes 26 tools. Last commit 18 Sep 2026.

Free US market data as tools: SEC filings, insiders, short interest, 13F, COT, ETF flows, liquidity.

Installs per day peak 462 · avg 39

a month agotoday

Uptime history 4 days of history · worst day 90%

4 days agonow

96.7%

Uptime 24h

88 of 91 checks

Tools

read from the server

854 ms

Response time

average over 24h

788

Installs / week

npm and PyPI

XOOMAR market data does not always answer

Over the last week it answered 94.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add xoomar-mcp --transport http https://xoomar.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "xoomar-mcp": {
      "url": "https://xoomar.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.xoomar-mcp]
url = "https://xoomar.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "xoomar-mcp": {
      "url": "https://xoomar.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "xoomar-mcp": {
      "url": "https://xoomar.com/mcp"
    }
  }
}

This one needs environment variables set before it will start: XOOMAR_API_KEY (Optional free account key from https://xoomar.com/signup: 120 requests a minute instead of 30.), XOOMAR_MAX_ROWS (Rows per tool result (default 200).). The author declared them in the registry entry; get the values from the project itself.

Available tools 26

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

fund

fund_holders

Which tracked 13F managers (Berkshire, Bridgewater, Citadel, Renaissance and others) held a ticker at their latest quarterly filing: shares, value, share of portfolio, change.

fund_portfolio

The latest 13F portfolio of one tracked manager by slug, e.g. berkshire-hathaway, bridgewater, citadel-advisors, renaissance-technologies. Positions with value, shares and share of portfolio.

insider

insider_clusters

Companies where several different insiders bought their own stock on the open market within a window (Form 4 transaction code P only): distinct buyers with titles, trades, combined value, first and latest trade dates. Default: three or more insiders in 30 days, sorted by number of insiders then value. Use ticker to check one company.

insider_trades

Insider transactions from SEC Form 4: insider name and title, transaction code, shares, price, value, date. History for a ticker from filings since 2020 (from, to and limit select the window, up to 2,000 rows) or the latest trades across companies (type P for open-market purchases, S for sales).

short

short_interest

Short interest for a US stock: shares short, average daily volume, days to cover, change, per FINRA settlement date (twice a month), newest first. Without a symbol: the latest settlement's highest days-to-cover names.

short_volume

Daily short sale volume and total volume per symbol from FINRA's Reg SHO files since August 2021, with the short share of volume. History for a symbol (oldest first; from, to and limit select the window, up to 5,000 days) or the latest day's largest short volumes.

api

api_reference

How the underlying free API works: endpoints, parameters, rate limits, CSV downloads and the attribution terms. Use when a tool here does not cover the exact query.

bitcoin

bitcoin_treasuries

Bitcoin holdings of public companies from their own XBRL filings: coins, fair value, cost basis, as of the filing period.

company

company_financials

Quarterly revenue, net income and diluted EPS (calendar quarters, fourth quarter derived from the annual report), annual revenue, net income, operating cash flow, capex, buybacks and dividends, and the latest balance sheet instants, from the company's own XBRL filings.

corporate

corporate_events

8-K current reports with their item numbers (2.02 earnings, 5.02 officer changes, 1.01 agreements and so on), for a ticker or the latest across companies.

cot

cot_positioning

Weekly CFTC positioning: the latest report across all tracked markets, or one market's history (e.g. gold, crude-oil, sp500, bitcoin, euro-fx, 10-year-note): open interest and long/short by trader category.

crypto

crypto_market

Open interest history for a symbol slug, recent liquidations across exchanges, Deribit options metrics (put/call, max pain, DVOL) for BTC or ETH, or Hyperliquid whale positions.

earnings

earnings_calendar

When US companies report results, from their own 8-K filings. With a ticker: every reported date since 2023 and the next expected date (an estimate: last year's date plus 52 weeks, with the basis). Without: the calendar window (default today to 14 days ahead; from and to open any window up to 120 days; status reported or estimated). Dates only, no EPS or consensus.

economic

economic_calendar

Scheduled US releases from the agencies' own calendars (CPI, PPI, payrolls, weekly jobless claims, PCE, GDP, retail sales, housing, durable goods, industrial production, trade, FOMC decisions and minutes, Beige Book), with the actual and previous print filled after release and a unit field. No consensus figures. Default window: last 7 days to next 30.

fails

fails_to_deliver

SEC fails-to-deliver quantity and price by settlement date for a symbol since January 2010 (from, to and limit select the window, up to 5,000 dates), or the latest settlement's largest fails by value.

fed

fed_liquidity

Weekly US net liquidity (Fed balance sheet minus the Treasury General Account minus reverse repo) with its components, oldest first, or one FRED series (WALCL, WRESBAL, RRPONTSYD, WTREGEN, SOFR, EFFR, IORB, WSHOSHO).

federal

federal_contracts

Largest US federal contract actions from USAspending, optionally summed by listed parent company (by=ticker) or filtered to one ticker.

funding

funding_rates

Current perpetual funding rates on Binance, Bybit, OKX, Hyperliquid, Kraken and BitMEX for tracked crypto symbols (hourly venues shown as the 8-hour equivalent), or one symbol's history by slug (e.g. btc, eth, sol).

ipo

ipo_pipeline

S-1 and F-1 registration statements, 424B4 final prospectuses, EFFECT notices and RW withdrawals from EDGAR, with the filer's listing status.

large

large_holders

Holders above 5% from Schedule 13D (active) and 13G (passive) cover pages: holder, shares, percent of class, filing date. For a symbol or the latest filings.

macro

macro_series

US Treasury yield curve points, curve spreads and stablecoin supply as daily series. Filter by series name and date range.

planned

planned_insider_sales

Form 144 notices: an affiliate's planned sale of restricted or control stock (seller, shares, approximate market value, planned date), filed before the trade.

policy

policy_rates

Policy rates for 49 economies: the current table, or one country code's history (e.g. us, eu, jp, gb).

private

private_placements

Form D notices of exempt offerings: issuer, amount sold, amount offered, investors, whether it is a pooled fund. Largest raises in a window, one issuer by CIK, or the most recent filings.

threshold

threshold_list

Reg SHO threshold lists from the Nasdaq and Cboe daily files since 2022: securities whose fails to deliver stayed above the threshold for five settlement days. One date (default the newest), one symbol's days on the list, or one listing market.

treasury

treasury_auctions

Treasury auction results and calendar since 2010 from TreasuryDirect: security type and term, auction and issue dates, offering amount, high yield or discount rate, bid-to-cover, dealer, direct and indirect allotments. Default: coupon auctions (notes, bonds, TIPS, FRNs); upcoming=true lists announced auctions not yet run.

Endpoints

URL	Transport	State	Latency	Checked
https://xoomar.com/mcp	streamable-http	answering	1142 ms	9 min ago

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XOOMAR market data — questions

Answers built from our own checks of this server.

What can XOOMAR market data do?

It exposes 26 tools, read directly from the server on our last check. Among them: api_reference, bitcoin_treasuries, company_financials, corporate_events, cot_positioning, crypto_market and 20 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is XOOMAR market data mostly used for?

Its tools cluster around insider, short and fund. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is XOOMAR market data working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 88 of 91 checks got a reply (96.7%), average response time 854 ms. The bar chart above shows every period we have measured.

How do I connect XOOMAR market data?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does XOOMAR market data need an API key?

No. XOOMAR market data completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 26 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is XOOMAR market data?

It answers our handshake in 854 ms on average, which is faster than 14% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use XOOMAR market data?

The npm package xoomar-mcp was installed 788 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is XOOMAR market data open source?

Yes — it is published under the Apache-2.0 licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.