# Prediction Market Rule Check

> Don't lose a winning trade to the small print — risk-score Polymarket and Kalshi settlement rules before you bet.

Remote MCP server (Streamable HTTP): https://prediction-rules-mcp.donniertf.workers.dev/mcp
Free tier: `rule_check` — no key, no sign-up, 20 calls/day per IP.
Pro: £12/month, cancel anytime — all tools, unlimited.

## Tools
- rule_check (free): FREE. Risk-score the settlement rules of a Polymarket market (slug or search words): flags discretion, vague sources, cancellation and deadline traps. Top 2 markets.
- rule_check_full (Pro): PRO. Full rule text + resolution source + all flags for up to 10 Polymarket markets matching a slug or search.
- kalshi_check (Pro): PRO. Risk-score a Kalshi market's rules by ticker (rules_primary + rules_secondary).
- scan_risky (Pro): PRO. Scan the top live Polymarket markets by volume and list the ones with the riskiest settlement wording.

## Buying (agents)
1. POST https://prediction-rules-mcp.donniertf.workers.dev/checkout -> {checkout_url, session_id}. A human (or a payment-capable agent) completes Stripe Checkout at checkout_url.
2. GET https://prediction-rules-mcp.donniertf.workers.dev/token?session_id=... -> {access_token}.
3. Send Authorization: Bearer <access_token> to https://prediction-rules-mcp.donniertf.workers.dev/mcp (or pass access_token in tool arguments).

## Pay per call (x402, USDC on Base)
No account: POST JSON args to https://prediction-rules-mcp.donniertf.workers.dev/x402/<tool> -> HTTP 402 with payment requirements ($0.03 USDC per call, payTo 0x02226D28e0c85AE4AdDB7fe7043Dd2b1Ff710D41). Retry with an X-PAYMENT header (x402 v1, scheme exact, network base). Manifest: https://prediction-rules-mcp.donniertf.workers.dev/.well-known/x402. MCP clients may also send X-PAYMENT on tools/call.
Machine-readable pricing: https://prediction-rules-mcp.donniertf.workers.dev/pricing.json · Server card: https://prediction-rules-mcp.donniertf.workers.dev/.well-known/mcp

## Sources
- Polymarket Gamma public API
- Kalshi public trade API (market data)

## Notes
Automated wording heuristics, not a prediction or financial advice. Always read the full market rules yourself; venues can clarify rules after you trade. Check prediction markets are legal where you live.
Contact: dmorrisonwebdesign@gmail.com. More UK data MCPs: https://github.com/donniertf-hub/uk-mcp-fleet