Pricing
Start free. Upgrade when you need more.
Mantis is a cross-venue prediction market router for traders and AI agents. Free tier covers most exploration use cases. Paid tiers unlock higher limits, webhook alerts, and L2 order book data.
Free
$0
100 requests / day
- ✓Search across Polymarket, Kalshi, Limitless, Myriad, SX Bet, PredictIt
- ✓route_market — best venue for any query
- ✓get_quote — live yes/no prices
- ✓execute_url — attributed trade link
- ✓get_arbitrage — cross-venue spreads
- ✓get_unmet_demand — demand intelligence
- ✓MCP endpoint for Claude / OpenAI agents
POPULAR
Starter
$29/mo
10,000 requests / day
- ✓Everything in Free
- ✓100× higher daily request limit
- ✓Webhook subscriptions (up to 5)
- ✓market_move · arbitrage · spread_threshold alerts
- ✓liquidity_spike · resolution_approaching alerts
- ✓L2 order book depth on get_quote
- ✓Fee-adjusted net spread on get_arbitrage
Pro
$199/mo
Unlimited requests
- ✓Everything in Starter
- ✓Unlimited daily requests
- ✓Up to 50 webhook subscriptions
- ✓Resolution rule safety scores
- ✓VWAP + slippage estimation (?size=N)
- ✓Price history API (daily snapshots)
- ✓Priority support
Frequently asked questions
What is Mantis?
Mantis is a cross-venue prediction market routing and intelligence layer. It searches Polymarket, Kalshi, Limitless, Myriad, SX Bet, and PredictIt simultaneously and returns the best-priced market with live odds, liquidity, and an attributed trade link.
Do I need an API key to search?
The web app at mantiss.store works without any account. An API key is required only when calling the REST API (/api/v1) or the MCP endpoint (/mcp) programmatically.
How do I connect Mantis to Claude or Cursor?
Run: claude mcp add mantis --transport http --url https://mantiss.store/mcp --header "Authorization: Bearer YOUR_KEY". The free key is enough to start.
Can I cancel anytime?
Yes. Subscriptions are monthly and cancel immediately. You keep access until the end of the billing period.