XOOMAR market data

Name: XOOMAR market data
Author: xoomar-code

by xoomar-codeversion 0.1.11i★ –iComputer or cloud

Registry namecom.xoomar/xoomar-mcp

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Other
You need to fill in: XOOMAR_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: XOOMAR_API_KEY, XOOMAR_MAX_ROWS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://xoomar.com/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "xoomar": {
      "command": "npx",
      "args": [
        "-y",
        "xoomar-mcp"
      ],
      "env": {
        "XOOMAR_API_KEY": "your-value",
        "XOOMAR_MAX_ROWS": "your-value"
      }
    }
  }
}

Run this in your terminal

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

Or run it on your computer

claude mcp add xoomar --env XOOMAR_API_KEY=your-value --env XOOMAR_MAX_ROWS=your-value -- npx -y xoomar-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "xoomar": {
      "command": "npx",
      "args": [
        "-y",
        "xoomar-mcp"
      ],
      "env": {
        "XOOMAR_API_KEY": "your-value",
        "XOOMAR_MAX_ROWS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "xoomar": {
      "type": "http",
      "url": "https://xoomar.com/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "xoomar": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "xoomar-mcp"
      ],
      "env": {
        "XOOMAR_API_KEY": "your-value",
        "XOOMAR_MAX_ROWS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://xoomar.com/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

XOOMAR_API_KEY secret env
Optional free account key from https://xoomar.com/signup: 30 requests a minute instead of 10.
XOOMAR_MAX_ROWS env
Rows per tool result (default 200).

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain xoomar.com (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 32537 servers in this category
Published to the registry more recently than 53% of the other 32537 servers in this category
Basic checks equal to or better than 100% of the other 32537 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is XOOMAR market data safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: XOOMAR_API_KEY

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.11) reached the registry 35 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, TF Rooms

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

xoomar-mcp

An MCP server that gives AI agents the XOOMAR free market data API as tools: 26 tools over 31 datasets built from primary sources (SEC EDGAR and XBRL, FINRA, CFTC, the Federal Reserve, USAspending, exchange APIs). No key needed to start.

Use it

Hosted, nothing to install: https://xoomar.com/mcp (Streamable HTTP). Add it as a remote MCP server or custom connector in Claude.ai, Claude Code (claude mcp add --transport http xoomar https://xoomar.com/mcp), ChatGPT, Cursor or any client that connects by URL. Send Authorization: Bearer or X-API-Key with a free account key for 30 requests a minute; without one the limit is 10 a minute per IP. Keyless and free-key requests return up to six months of history.

Local, over stdio: Claude Desktop (claude_desktop_config.json), Claude Code, Cursor, Windsurf and any other MCP client that launches stdio servers:

"mcpServers": { "xoomar": { "command": "npx", "args": ["-y", "xoomar-mcp"] } } }

Claude Code, one line:

claude mcp add xoomar -- npx -y xoomar-mcp

As a library (the hosted endpoint is built this way):

import { buildServer } from "xoomar-mcp";

const server = buildServer({ apiKey: "xm_live_...", maxRows: 100 }); // an McpServer with the 26 tools; connect any transport

Optional environment for the stdio bin: XOOMAR_API_KEY (a free account key from https://xoomar.com/signup raises the limit from 10 to 30 requests a minute; keyless and free-key requests return up to six months of history), XOOMAR_MAX_ROWS (rows per tool result, default 200).

Tools

Tool	What it returns
`short_interest`	FINRA short interest with days to cover, per settlement date
`short_volume`	FINRA daily short sale volume and the short share of volume, since 2021
`fails_to_deliver`	SEC fails to deliver by settlement date, since 2010
`insider_trades`	SEC Form 4 insider transactions
`insider_clusters`	Companies where several insiders bought on the open market in a window
`threshold_list`	Reg SHO threshold securities lists (Nasdaq and Cboe, since 2022)
`planned_insider_sales`	SEC Form 144 notices of proposed sale
`large_holders`	Schedule 13D and 13G holders above 5%
`fund_holders`	Which tracked 13F managers hold a ticker
`fund_portfolio`	One tracked manager's latest 13F portfolio
`company_financials`	Quarterly and annual figures and the balance sheet from XBRL
`earnings_calendar`	Reported earnings dates from 8-K Item 2.02 filings and the next expected date per company (estimated, with its basis)
`corporate_events`	8-K material events by item
`cot_positioning`	CFTC Commitments of Traders, latest or one market's history
`funding_rates`	Perpetual funding on Binance, Bybit, OKX, Hyperliquid and Kraken (BitMEX history to 16 Sep 2026, when it closed its swaps)
`fed_liquidity`	Net liquidity and its components, or one FRED series
`policy_rates`	Central bank policy rates, 38 economies with a current series
`macro_series`	US yield curve, spreads, stablecoin supply
`treasury_auctions`	Treasury auction results and calendar since 2010
`economic_calendar`	22 US release types from the agencies' schedules, with actuals after release
`private_placements`	SEC Form D private placements
`ipo_pipeline`	S-1, F-1, 424B4, EFFECT and RW filings
`bitcoin_treasuries`	Bitcoin held by public companies
`federal_contracts`	US federal contract actions by listed parent
`crypto_market`	Open interest, liquidations, options metrics, whale positions
`api_reference`	How the underlying API works

Every result carries updatedAt, source (who publishes the data: FINRA, the SEC, the CFTC, the exchange), sourceAttribution (the credit line to show with it) and the attribution line. Ask things like "How has GME short interest moved this year?", "Which tracked funds bought NVDA last quarter?", "What is Fed net liquidity doing?", "Show open-market insider purchases in the last 7 days".

Where it is listed

Listed in the official MCP registry as com.xoomar/xoomar-mcp, on npm as xoomar-mcp, and on mcpservers.org.

Data terms

When you republish the data, credit XOOMAR with a visible link to the dataset page on xoomar.com, together with the result's sourceAttribution line. What you may do with the data is set out at https://xoomar.com/terms.

Development

npm install

npm test # builds, then talks to the server over stdio (one test hits the live API)

Apache-2.0 for this code, XOOMAR. The license covers the code only, not the data.

XOOMAR market data

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

TF Rooms

README from the maker

xoomar-mcp

Use it

Tools

Where it is listed

Data terms

Development