x402-factory
Where Kalshi and Polymarket disagree on the same event, ranked by gap — Active prediction markets priced on both Kalshi and Polymarket, ranked by how far the two venues disagree on the implied probability — with direction, each venue's liquidity, and, where each venue's own resolved history proves it, which has been better calibrated in that category. Derived analytics; the calibration claim is…
Offering
- Provider
- x402-factory.com
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Prediction Markets
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://x402-factory.com/v1/cross-venue/disagreement- MIME type
- application/json
- First seen
- 2026-10-16T01:51:40.954Z
- Last seen
- Tags
- prediction, cross-venue, disagreement, calibration
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.05 USDC
Atomic price: 50000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"payTo": "0xCc42Ed39a06b6cF3f484307eF76B88Bf56Fb305f"
}
]Observed health
- Status
- Healthy
- Latest latency
- 32 ms
- Average latency
- 38 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 13 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"queryParams": {
"type": "object",
"properties": {
"category": {
"description": "Filter to one category, e.g. politics",
"type": "string",
"minLength": 2,
"maxLength": 20
},
"min_gap": {
"description": "Only rows whose venue gap is at least this",
"type": "number",
"minimum": 0,
"maximum": 1
}
},
"required": []
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"category": {
"description": "Filter to one category, e.g. politics",
"maxLength": 20,
"minLength": 2,
"type": "string"
},
"min_gap": {
"description": "Only rows whose venue gap is at least this",
"maximum": 1,
"minimum": 0,
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"additionalProperties": false,
"properties": {
"calibration_reference": {
"type": "string"
},
"linked_market_count": {
"type": "number"
},
"markets": {
"items": {
"additionalProperties": false,
"properties": {
"better_calibrated_venue": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"description": "The venue with lower calibration error on ITS OWN markets in this category (not a head-to-head on identical markets); null unless both venues clear n>=200 and the gap is statistically significant"
},
"calibration_basis": {
"anyOf": [
{
"items": {
"additionalProperties": false,
"properties": {
"calibration_error": {
"type": "number"
},
"category": {
"type": "string"
},
"horizon_hours": {
"type": "number"
},
"n": {
"type": "number"
},
"venue": {
"type": "string"
},
"window": {
"type": "string"
}
},
"required": [
"venue",
"category",
"window",
"horizon_hours",
"calibration_error",
"n"
],
"type": "object"
},
"type": "array"
},
{
"type": "null"
}
],
"description": "Both venues' audited calibration numbers behind the verdict; null when the overlay is withheld"
},
"calibration_computed_at": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"description": "When the calibration overlay was computed (up to ~1h stale; null when withheld)"
},
"category": {
"type": "string"
},
"direction": {
"description": "Which venue prices it higher",
"type": "string"
},
"gap": {
"description": "Max − min implied probability across the venues pricing this event",
"type": "number"
},
"question": {
"type": "string"
},
"resolution_date": {
"type": "string"
},
"slug": {
"type": "string"
},
"venues": {
"items": {
"additionalProperties": false,
"properties": {
"implied_p": {
"type": "number"
},
"liquidity_usd": {
"type": "number"
},
"venue": {
"type": "string"
}
},
"required": [
"venue",
"implied_p",
"liquidity_usd"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"slug",
"question",
"category",
"resolution_date",
"venues",
"gap",
"direction",
"better_calibrated_venue",
"calibration_basis",
"calibration_computed_at"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"markets",
"linked_market_count",
"calibration_reference"
],
"type": "object"
},
"meta": {
"type": "object"
}
},
"required": [
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}