Siren
Siren is the execution and risk intelligence layer for prediction markets. It does not try to replace Kalshi, Polymarket, or onchain venues. It sits above them and answers the questions active traders actually feel in real time:- Can this trade actually get done at my size?
- Why did the route fail?
- How exposed am I across related events?
- What changes as resolution gets closer?
- What should I do next after a partial fill or rejection?
App: onsiren.xyz
Docs: docs.onsiren.xyz
What Siren does
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Execution feasibility before submit
Siren surfaces more than a headline price. It helps you understand whether the venue can actually absorb your size. -
Adaptive execution when routes are thin
If full size is unrealistic, Siren can step trades down and make the failure state legible instead of opaque. -
Explainable route outcomes
Traders should not have to decode vague venue errors. Siren translates route and venue failures into plain language. -
Portfolio and resolution risk clarity
Siren brings balances, open positions, realized outcomes, execution readiness, and soon correlated risk into one account surface. -
Post-trade context
Siren is building toward summaries of what filled, what failed, what size worked, and how to act next.
How Siren fits the market stack
Think in layers:-
Venues and liquidity
Kalshi, Polymarket, and other prediction venues where rules and order books live. -
Capital and structured layers
Leverage, bundles, structured products, and alternate wrappers around venue exposure. -
Siren
Execution reliability, route context, sizing help, risk guardrails, and post-trade clarity.
Product pillars
1. Execution feasibility
Before or at submit time, Siren helps you understand whether the market can plausibly clear at the size you want.2. Adaptive execution
When full size is unrealistic, Siren supports smaller controlled steps instead of opaque failure loops.3. Route explanation
Error output should become human-readable and actionable.4. Risk guardrails
Start with simple rules that change behavior:- concentration hints
- venue readiness
- resolution awareness
5. Post-trade reporting
Every trade should leave behind context, not just a signature.Agentic direction
Siren’s later layer can become agentic:- execution copilots that suggest smaller routes
- portfolio agents that warn on correlated exposure
- post-trade agents that summarize failures and next actions
- daily intelligence briefs across venues and positions
Where to go next
- Quickstart: Get into the app and make your first trade.
- Product thesis: The category Siren is building.
- Execution intelligence: The core product wedge.
- Terminal: How the live market workspace works.
- Portfolio: How Siren frames balances, positions, and risk.
- Agentic workflows: Where copilots fit into Siren next.