Marketmaster

live.marketmasterPublished by marketmaster.liveOfficial publisherv0.1.4Updated Oct 24, 2026

Live Kalshi and Polymarket data: EV edges, cross-venue arbitrage, markets, and whale trades.

VerifiedStreamable HTTPWeb executableFinanceData & Analytics

Overview

AI-generated overview

Gives an assistant live Kalshi and Polymarket prediction-market data, including EV edges, cross-venue arbitrage, markets, and whale trades.

What you can do
This server exposes live prediction-market data from Kalshi and Polymarket to an assistant. According to its description, it covers expected-value edges, cross-venue arbitrage opportunities, market listings, and whale trades. No individual tools are listed in the manifest, so the exact operations available are not documented here.
When to use it
Worth considering when an assistant needs current prediction-market information, such as comparing prices across Kalshi and Polymarket, looking for arbitrage or EV edges, or tracking large trades. Not useful for tasks outside prediction-market data.
Requirements
An API key named MARKETMASTER_API_KEY, obtained from the provider's dashboard, is required; a free tier is mentioned. The remote endpoint also expects an Authorization header carrying a Bearer token with the same key. It can run as a remote streamable HTTP endpoint or as a local npm package over stdio, which needs Node.js.
Before you install
The server requires a secret API key (MARKETMASTER_API_KEY, also sent as an Authorization Bearer header); keep it out of logs and shared configuration. The manifest declares no authentication, yet the key is marked required, so verify how access is actually enforced. The data concerns financial markets and trading signals; treat any edges or arbitrage output as informational, not advice, and confirm figures independently before acting.

Installation

In SourceWeft

  1. Open Marketmaster in the dashboard and add it to a workspace.
  2. Connect Authorization token credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/live.marketmaster%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "marketmaster": {
      "type": "http",
      "url": "https://api.marketmaster.live/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_TOKEN>"
      }
    }
  }
}

Tools

6

mm_edges

Find mispriced edges

Mispriced prediction-market edges (model fair value vs live price), ranked by edge size, across Kalshi and Polymarket.

Parameterslimitoffsetcategorymin_edgeplatform

mm_markets

List market snapshots

Latest normalized market snapshots across venues (title, YES/NO price, 24h volume, close time).

Parameterslimitoffsetsourcecategory

mm_market

Get one market

A single market's latest snapshot plus any live edges for it.

Parametersidrequiredsourcerequired

mm_arbitrage

Cross-venue price spreads

Two-leg cross-venue locks on Yes/No markets listed on both Kalshi and Polymarket: buy YES on one venue and NO on the other at the ask. Returns the spread before fees and net of taker fees; depth and slippage not included.

Parameterslimitoffsetmin_spread

mm_whales

Recent whale trades

Recent large real-money trades (whale fills) across venues, newest first.

Parametersminlimitoffsetsource

mm_status

API key status

Your API key's tier, rate limits, and current usage.

Takes no parameters.

Version history

1
  1. v0.1.4LatestSep 16, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.