Mantis MCP Server

by alfred768 Your server? Claim it

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 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

141 ms

Response time

average over 24h

open, no key

Access

streamable-http

Mantis does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mantis --transport http https://mantiss.store/mcp

Settings → Connectors → Add custom connector, then paste this address

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

{
  "servers": {
    "mantis": {
      "type": "http",
      "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

URL	Transport	State	Latency	Checked
https://mantiss.store/mcp	streamable-http	answering	141 ms	13 min ago

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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 0 of 91 checks got a reply (0.0%), average response time 141 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 in the form 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.