Polymarket vs Kalshi

io.github.Data-ForgerPublished by GitHub account Data-Forgerv1.0.0Updated Oct 31, 2026

Same market on Polymarket and Kalshi: both prices, the gap, edge, alerts and history. Sports too.

VerifiedStreamable HTTPWeb executableFinance

Overview

AI-generated overview

Remote Apify-hosted MCP server that compares the same prediction market on Polymarket and Kalshi, showing both prices, the gap, edge, alerts and history.

What you can do
  • Compare the same market across Polymarket and Kalshi, including sports markets.
  • Retrieve prices from both venues side by side.
  • Show the price gap and calculated edge between the two.
  • Access alerts and historical data for the compared markets.
  • No individual tools are documented, so exact operations are not listed.
When to use it
Useful when you want an assistant to check how a prediction market is priced on Polymarket versus Kalshi, spot arbitrage-like gaps or edge, and follow changes over time, including sports markets.
Requirements
A remote MCP endpoint at mcp.apify.com over streamable HTTP. OAuth authentication is required; no environment variables or headers are declared.
Before you install
It handles market pricing data, not trading, but any figures it returns should be verified before acting on them. OAuth grants access to the Apify account tied to the connection, and queries are sent to a third-party hosted service.

Installation

In SourceWeft

  1. Open Polymarket vs Kalshi in the dashboard and add it to a workspace.
  2. Connect the required 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/io.github.Data-Forger%2Fpolymarket-kalshi/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. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "polymarket-vs-kalshi": {
      "type": "http",
      "url": "https://mcp.apify.com/?tools=forgedata/prediction-markets-api"
    }
  }
}

README

This repository has no README.

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestOct 31, 2026

Score

60% 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 listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • 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.