Scans every US stock that also trades as a 24/7 synthetic perp and returns the g
Scans every US stock that also trades as a 24/7 synthetic perp and returns the gap: official (delayed) price, prev close, perp mark and oracle, funding APR, open interest, and computed `basis_percent` + `basis_vs_prev_close_percent` — the implied overnight move while the US market is shut. Widest dislocation first, plus a plain-English `reading`. `?limit=`, `?min_basis=`. From x402stock
Answeringour last check, 2026-09-24
1 of 1checks answered this week
317 msmedian answer time
$0.05listed price per call
$0.05price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://x402stock.xyz/api/v1/basis
| Category | Market data |
|---|---|
| Provider host | x402stock.xyz |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.05 | 317 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"limit": 40,
"min_basis": 0
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"limit": {
"default": 40,
"exclusiveMinimum": 0,
"maximum": 200,
"type": "integer"
},
"min_basis": {
"default": 0,
"maximum": 100,
"minimum": 0,
"type": "number"
}
},
"required": [
"min_basis",
"limit"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"as_of": {
"type": "string"
},
"count": {
"type": "number"
},
"method": {
"type": "string"
},
"note": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"reading": {
"type": "string"
},
"rows": {
"items": {
"additionalProperties": false,
"properties": {
"basis_absolute": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"basis_percent": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"basis_vs_prev_close_percent": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"comparable": {
"type": "boolean"
},
"direction": {
"enum": [
"premium",
"discount",
"flat",
"unknown"
],
"type": "string"
},
"equity_as_of": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"equity_change_percent": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"equity_prev_close": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"equity_price": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"excluded_reason": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"perp_day_volume_usd": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"perp_funding_apr_percent": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"perp_mark": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"perp_open_interest": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"perp_oracle": {
"anyOf": [
{
"type": "number"
},
{
"ty