Event Resolver API

Resolve real-world events for prediction market settlement. Aggregates data from multiple sources to determine if an event occurred, with confidence scores and source attribution.

What It Does / Endpoints

Endpoint	Method	Price	Description
/api/resolve	POST	$0.005	Full event resolution with confidence score and sources
/api/verify	POST	$0.003	Quick-verify a factual claim (true/false/unverifiable)
/api/price-check	POST	$0.002	Check if crypto price crossed a threshold

Example Request/Response

POST /api/resolve

curl -X POST https://event-resolver-production.up.railway.app/api/resolve \
  -H "Content-Type: application/json" \
  -d '{"question": "Did BTC reach $100K?", "type": "binary"}'

Response:

{
  "question": "Did BTC reach $100K?",
  "resolved": true,
  "outcome": "Yes",
  "confidence": 95,
  "sources": [
    {
      "name": "CoinGecko",
      "url": "https://www.coingecko.com/en/coins/bitcoin",
      "agrees": true
    }
  ],
  "timestamp": "2026-04-13T12:00:00.000Z",
  "type": "binary"
}

POST /api/verify

curl -X POST https://event-resolver-production.up.railway.app/api/verify \
  -H "Content-Type: application/json" \
  -d '{"claim": "Bitcoin is above $90,000"}'

Response:

{
  "claim": "Bitcoin is above $90,000",
  "verdict": "true",
  "confidence": 95,
  "evidence": [
    "bitcoin current price: $102,450 (via CoinGecko)",
    "Threshold $90,000 above: crossed"
  ]
}

POST /api/price-check

curl -X POST https://event-resolver-production.up.railway.app/api/price-check \
  -H "Content-Type: application/json" \
  -d '{"asset": "bitcoin", "threshold": 100000, "direction": "above"}'

Response:

{
  "asset": "bitcoin",
  "currentPrice": 102450.23,
  "threshold": 100000,
  "direction": "above",
  "crossed": true,
  "crossedAt": "2026-04-13T12:00:00.000Z",
  "timestamp": "2026-04-13T12:00:00.000Z"
}

Use Cases

• Prediction market settlement -- Automated oracle for resolving binary, numeric, and categorical outcomes on-chain
• Fact checking -- Quick verification of claims with confidence scores and source attribution
• Price monitoring -- Check if crypto assets crossed key price thresholds for contract settlement
• Event tracking -- Determine if real-world events (elections, sports, policy changes) occurred
• On-chain resolution -- Provide objective data for HIP-4, Polymarket, or custom smart contract settlement

MCP Integration

Add to your Claude Desktop or Cursor config:

{
  "mcpServers": {
    "event-resolver": {
      "url": "https://event-resolver-production.up.railway.app/sse"
    }
  }
}

Payment

All endpoints use x402 protocol -- pay-per-call with USDC on Base L2. No API keys, no subscriptions. Your agent pays automatically.

Related APIs

• Token Price API -- Get crypto token prices without resolution logic
• Prediction Markets API -- List prediction market odds and contracts
• Research Fact Check API -- Deep fact checking with full source citations
• Trust Score API -- Evaluate trustworthiness of domains and wallets
• Stock Quote API -- Real-time stock price quotes