mcpbeat

Mantis MCP Server

io.github.Alfred768/mantis
not responding

Mantis is listed as active in the registry but did not answer our last check. It exposes 6 tools.

Cross-venue prediction market routing for AI agents with arbitrage, quotes, history, and signals.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 40 hours of history · worst hour 0%
40 hours agonow
15.4%
Uptime 24h
14 of 91 checks
6
Tools
read from the server
448 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add mantis --transport http https://mantiss.store/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mantis": {
      "url": "https://mantiss.store/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mantis]
url = "https://mantiss.store/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mantis": {
      "url": "https://mantiss.store/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mantis": {
      "url": "https://mantiss.store/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

arbitrage
get_arbitrage
Find live cross-venue arbitrage opportunities — markets where the same event trades at different prices on Polymarket vs Kalshi vs other venues. Can also estimate fee-normalized net spread for a position size.
execute
execute_url
Get a deep link URL to place a trade on the best venue for a given market. The URL has a referral code embedded so the platform earns commission. Call this to get the URL, then direct the user to open it.
history
get_history
Get historical OHLCV-style prediction market candles over a time range, including the latest stored depth snapshot within each bucket when available. Can also export CSV text or base64-encoded Parquet.
quote
get_quote
Get the live probability, liquidity, and volume for a prediction market across all venues. Can also return venue order book depth and size-aware VWAP/slippage estimates.
route
route_market
Find the best prediction market for a natural-language question or trading intent. Returns the best cross-venue match, current probability, liquidity, and any arbitrage opportunity between venues.
unmet
get_unmet_demand
Find questions that users are searching for but no prediction market exists. Useful for discovering new market creation opportunities or identifying emerging topics with real trading interest.

Endpoints

URLTransportStateLatencyChecked
https://mantiss.store/mcp streamable-http answering 121 ms 12 min ago

Mantis — questions

Answers built from our own checks of this server.

What can Mantis do?
It exposes 6 tools, read directly from the server on our last check. Among them: execute_url, get_arbitrage, get_history, get_quote, get_unmet_demand, route_market. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Mantis working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 14 of 91 checks got a reply (15.4%), average response time 448 ms. The bar chart above shows every period we have measured.
Is Mantis still maintained?
The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.
The registry lists Mantis as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Mantis?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Mantis need an API key?
No. Mantis completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Mantis?
It answers our handshake in 448 ms on average, which is faster than 28% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.