MCP server

Crosswire — Polymarket & Kalshi Arbitrage

com.crosswire-api/crosswire-polymarket-kalshi-arbitrage

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Cross-venue Polymarket+Kalshi arbitrage: resolution mismatch, void risk & settlement divergence.

Website Source

At a glance

Type

MCP server

Publisher

crosswire-api.com (verified by the MCP Registry)

Status

Working at last check

Tools

2

Token cost

About 1,555 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http crosswire-polymarket-kalshi-arbitrage https://api.crosswire-api.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.crosswire-polymarket-kalshi-arbitrage]
url = "https://api.crosswire-api.com/mcp"

Gemini CLI

{"mcpServers":{"crosswire-polymarket-kalshi-arbitrage":{"httpUrl":"https://api.crosswire-api.com/mcp"}}}

Cursor

{"mcpServers":{"crosswire-polymarket-kalshi-arbitrage":{"url":"https://api.crosswire-api.com/mcp"}}}

VS Code

{"servers":{"crosswire-polymarket-kalshi-arbitrage":{"type":"http","url":"https://api.crosswire-api.com/mcp"}}}

Antigravity

agy mcp add crosswire-polymarket-kalshi-arbitrage https://api.crosswire-api.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"crosswire-polymarket-kalshi-arbitrage","server_url":"https://api.crosswire-api.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"crosswire-polymarket-kalshi-arbitrage","server_url":"https://api.crosswire-api.com/mcp"}

Tools

• check_resolution_risk ~1331 tokens
  Pre-trade safety check for cross-venue event markets (crypto oracle-divergence pairs, metered; World Cup football, free). Flags resolution mismatches, void-rule divergence, scope differences (e.g. 90-minute vs extra-time; matched vs differing strike), settlement-source and -timing gaps, stale data,
• list_covered_events ~224 tokens
  Free discovery of everything check_resolution_risk can audit across both inventories — the free World Cup football pairs and the metered crypto oracle-divergence pairs (the 'crypto:' namespace is the paid surface: $0.02 USDC per call after 3 free calls/day). Returns the covered canonical events, the

Browse

• Stocks and markets
• Crypto and blockchains
• Sports

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Badge for your README

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