SYNTHORA.

POST https://api.hergertsynthora.com/v1/prediction-markets ↗

SYNTHORA prediction-markets: top prediction markets from Polymarket and Kalshi — implied probability, bid-ask spread, liquidity, volume, open interest and freshness seal (UTC timestamp). Filter with {"limit": N, "source": "all|polymarket|kalshi", "min_liquidity": usd}. For autonomous trading, political-risk and allocation agents. $0.05 USDC via x402 on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.

Eligibility: unprobeable
Failures: 0
Last quote: —
Last probe: —

Payment requirements / accepts[] 1 options

State	Network	Scheme	Atomic amount	Asset	payTo / untrusted
active	eip155:8453	exact	50000	0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913	0x10800a5a5B9d72251566EC651E862A8b4B427dE0

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 0 recent

No probe attempts recorded yet. Coverage runs prioritize never-probed endpoints.

Machine contract

Schemas.

InputJSON

{
  "body": {
    "limit": 10,
    "min_liquidity": 1000,
    "source": "all"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

OutputJSON

{
  "example": {
    "niche": "prediction_markets",
    "ok": true,
    "result": {
      "count": 1,
      "freshness_utc": "2026-08-07T12:00:00Z",
      "markets": [
        {
          "end_date": "2026-12-31T00:00:00Z",
          "exchange": "polymarket",
          "id": "559651",
          "liquidity_usd": 278050.28,
          "probability_yes": 0.05,
          "question": "Xi Jinping out before 2027?",
          "spread": 0.01,
          "volume_usd": 1234567.89
        }
      ],
      "source": "all",
      "total_liquidity_usd": 278050.28
    }
  },
  "type": "json"
}