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x402-factory Prediction Market Liquidity Analytics
x402
x402-factory Prediction Market Liquidity Analytics is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).
Returns real-time liquidity analytics for a prediction market by slug, including bid-ask spreads, order book depth, slippage estimates, and 24-hour volume profiles across Kalshi and Polymarket.
Price / call$0.03
Success—
StatusUnknown
How this service works
Paid data APIs for AI agents: prediction-market analytics, weather intelligence, weather×market edge signals, and SEC/gov data. Paid endpoints use the x402 protocol (HTTP 402 + USDC on Base): call without payment to receive requirements, retry with an X-PAYMENT header. Machine-readable catalog: /llms.txt. Per-endpoint docs: /docs/{id}.
Output
A JSON object with per-venue breakdown (Kalshi and Polymarket) of bid-ask spread in cents, estimated slippage in cents, and order book depth within 1¢ and 5¢ in USD; plus aggregate 24-hour volume in USD; and an hourly volume profile array (hour, volume_usd) covering the last 24 hours. Metadata includes data source, freshness, endpoint version, and a unique request ID.
Example use cases
Pre-trade slippage check for large position
“Before I put $20,000 into the 'fed-rate-cut-september' market, can you check the order book depth and estimated slippage across Kalshi and Polymarket so I know what price impact to expect?”
Best venue routing for prediction market trade
“I want to trade the 'us-inflation-above-3-percent' contract — can you pull the spreads and depth on both Kalshi and Polymarket so I can see which venue has better liquidity right now?”
Hourly volume pattern analysis
“Show me the 24-hour volume profile for the 'next-world-series-winner' prediction market — I want to know which hours of the day see the most trading activity so I can time my entry.”
Technical details
Endpoint
GEThttps://x402-factory.com/v1/liquidity/%7Bslug%7D?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time microstructure data (spread, depth, slippage, volume) for a specific prediction market contract across Kalshi and Polymarket. Prefer it over generic market price endpoints when the goal is execution quality assessment — understanding if and how cheaply a position can be entered or exited — rather than just fetching a probability or price. Best for trading bots, arbitrage detection, and liquidity-aware order routing.
Side effects
- Invalid or non-existent slug returns 404 or empty data object
- Market not listed on either venue returns empty per_venue array
- Slug format mismatch (not kebab-case) causes 400 validation error
- Payment not provided returns HTTP 402 with X-PAYMENT requirements
- Temporary venue API outage may reduce per_venue coverage to one source
- notional_usd outside 1–100000 range causes schema validation rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"per_venue": [
{
"venue": "kalshi",
"spread_c": 1,
"est_slippage_c": 0.11,
"depth_within_1c_usd": 43511.16,
"depth_within_5c_usd": 220022.94
},
{
"venue": "polymarket",
"spread_c": 1,
"est_slippage_c": 0.14,
"depth_within_1c_usd": 52295.06,
"depth_within_5c_usd": 175633.51
}
],
"volume_24h_usd": 591880.68,
"volume_profile_24h": [
{
"hour": 13,
"volume_usd": 22654.53
},
{
"hour": 14,
"volume_usd": 28433.7
},
{
"hour": 15,
"volume_usd": 23554.93
},
{
"hour": 16,
"volume_usd": 24849.59
},
{
"hour": 17,
"volume_usd": 27004.33
},
{
"hour": 18,
"volume_usd": 24873.7
},
{
"hour": 19,
"volume_usd": 20998.15
},
{
"hour": 20,
"volume_usd": 22003.64
},
{
"hour": 21,
"volume_usd": 31425.32
},
{
"hour": 22,
"volume_usd": 24433.02
},
{
"hour": 23,
"volume_usd": 28671.91
},
{
"hour": 0,
"volume_usd": 21033.08
},
{
"hour": 1,
"volume_usd": 19440.17
},
{
"hour": 2,
"volume_usd": 27355.65
},
{
"hour": 3,
"volume_usd": 33541.3
},
{
"hour": 4,
"volume_usd": 19872.25
},
{
"hour": 5,
"volume_usd": 20189.92
},
{
"hour": 6,
"volume_usd": 28022.61
},
{
"hour": 7,
"volume_usd": 25217.71
},
{
"hour": 8,
"volume_usd": 20702.89
},
{
"hour": 9,
"volume_usd": 26834.01
},
{
"hour": 10,
"volume_usd": 22330.71
},
{
"hour": 11,
"volume_usd": 22008.88
},
{
"hour": 12,
"volume_usd": 19213.25
}
]
},
"meta": {
"docs": "https://x402-factory.com/docs/probability.liquidity",
"sources": [
"kalshi",
"polymarket"
],
"version": "1.0.0",
"endpoint": "/v1/liquidity/{slug}",
"data_mode": "live",
"freshness": "realtime",
"request_id": "req_00000000",
"generated_at": "2026-08-21T03:58:58.104Z"
}
}
}Tags
x402
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