Connect Crosswire — Polymarket & Kalshi Arbitrage and your agent gets 2 tools, among them check_resolution_risk, list_covered_events. It answers at https://api.crosswire-api.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 4 September 2026; the last check, on 18 October 2026, succeeded.
Cross-venue Polymarket+Kalshi arbitrage: resolution mismatch, void risk & settlement divergence.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_resolution_risk | 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 differi Inputs: market_a, market_b, canonical_event_id, notional_usd, mode, api_key |
list_covered_events | 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 |
Every block below points at https://api.crosswire-api.com/mcp. Pick your client and copy.
claude mcp add --transport http crosswire-polymarket-kalshi-arbi https://api.crosswire-api.com/mcp
{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://api.crosswire-api.com/mcp"]
}
}
}{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"url": "https://api.crosswire-api.com/mcp"
}
}
}{
"servers": {
"crosswire-polymarket-kalshi-arbi": {
"type": "http",
"url": "https://api.crosswire-api.com/mcp"
}
}
}{
"context_servers": {
"crosswire-polymarket-kalshi-arbi": {
"url": "https://api.crosswire-api.com/mcp"
}
}
}{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"serverUrl": "https://api.crosswire-api.com/mcp"
}
}
}{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"url": "https://api.crosswire-api.com/mcp"
}
}
}name: Crosswire — Polymarket & Kalshi Arbitrage
version: 0.0.1
schema: v1
mcpServers:
- name: Crosswire — Polymarket & Kalshi Arbitrage
type: streamable-http
url: https://api.crosswire-api.com/mcp{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"httpUrl": "https://api.crosswire-api.com/mcp"
}
}
}{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"type": "http",
"url": "https://api.crosswire-api.com/mcp"
}
}
}{
"mcpServers": {
"crosswire-polymarket-kalshi-arbi": {
"url": "https://api.crosswire-api.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fapi.crosswire-api.com%2Fmcp&type=streamable_http&id=crosswire-polymarket-kalshi-arbi&name=Crosswire%20%E2%80%94%20Polymarket%20%26%20Kalshi%20Arbitrage
It answered our last check on 18 October 2026 in 238 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by crosswire-api.com and served from api.crosswire-api.com, the vendor's own domain: https://api.crosswire-api.com/mcp.
2, as returned by the server's own tools/list on 10 September 2026: check_resolution_risk, list_covered_events.
It answered our last check on 18 October 2026 in 238 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://api.crosswire-api.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.crosswire-api. Endpoint host: api.crosswire-api.com. ARD identifier: urn:air:com.crosswire-api:mcp:crosswire-polymarket-kalshi-arbitrage.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.