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SYNTHORA Prediction Markets
x402
SYNTHORA Prediction Markets is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Returns top prediction markets from Polymarket and Kalshi with implied probabilities, bid-ask spreads, liquidity, volume, open interest, and freshness timestamps
Price / call$0.01
Success—
StatusUnknown
How this service works
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.
Output
A ranked list of prediction markets (up to the requested limit) including: market name/question, implied probability, bid-ask spread, liquidity in USD, trading volume, open interest, exchange source (Polymarket or Kalshi), and a UTC freshness timestamp indicating when data was last updated.
Example use cases
Political risk pre-election screening
“Pull the top 20 prediction markets from Polymarket and Kalshi related to the current election cycle, sorted by liquidity, and only show me markets with at least $10,000 in liquidity so I can assess political risk for my portfolio.”
Prediction market arbitrage scanning
“Get me the top 25 markets across both Polymarket and Kalshi right now — I want bid-ask spreads and implied probabilities so I can spot any pricing discrepancies between the two exchanges worth trading.”
Autonomous trading agent market feed
“Fetch the 10 most liquid Polymarket markets right now with their implied probabilities, volume, and timestamps so my trading agent can decide where to allocate.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/prediction-markets?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need aggregated, cross-exchange prediction market data combining Polymarket and Kalshi in a single call with unified schema. Prefer it over direct exchange APIs when building political-risk models, autonomous trading agents, or portfolio allocation tools that need normalized liquidity, volume, and probability data with a freshness guarantee. The $0.05 USDC per-call pricing (with first 3 calls free) makes it cost-effective for iterative screening workflows.
Side effects
- Upstream failure from Polymarket or Kalshi API returns no charge and an error flag
- Invalid source enum value returns a 400 validation error
- min_liquidity set too high may return an empty result set
- limit out of range (below 1 or above 50) returns validation error
- Stale data if upstream exchanges are delayed — check UTC freshness timestamp
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | max markets to return (1-50, default 10) |
| source | string | exchange filter |
| min_liquidity | number | minimum liquidity in USD (default 1000) |
Tags
x402
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