Stopping distance from speed
Stopping distance from speed: reaction distance plus braking distance on dry, wet, snow or ice, with road grade.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://automotive-calc.x402tookit.com/stopping-distance
| Category | Everything else |
|---|---|
| Provider host | automotive-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 289 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"reactionSeconds": 1.5,
"speed": 60,
"surface": "dry-asphalt",
"unit": "mph"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"friction": {
"description": "Or a friction coefficient, 0.05 to 1.2 (replaces surface)",
"type": "number"
},
"gradePercent": {
"description": "Road grade in %, -20 to 20 (positive uphill shortens braking, negative downhill lengthens it)",
"type": "number"
},
"reactionSeconds": {
"description": "Driver reaction time in seconds, 0 to 4 (default 1.5)",
"type": "number"
},
"speed": {
"description": "Speed, 1 to 250",
"type": "number"
},
"surface": {
"description": "dry-asphalt (default, friction 0.7), wet-asphalt (0.4), snow (0.2) or ice (0.1)",
"type": "string"
},
"unit": {
"description": "mph (default) or kmh",
"type": "string"
}
},
"required": [
"speed"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"brakingDistanceFt": {
"type": [
"null",
"number"
]
},
"brakingDistanceM": {
"type": [
"null",
"number"
]
},
"decelerationG": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"frictionCoefficient": {
"type": [
"null",
"number"
]
},
"gradePercent": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reactionDistanceFt": {
"type": [
"null",
"number"
]
},
"reactionDistanceM": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"speedKmh": {
"type": [
"null",
"number"
]
},
"speedMph": {
"type": [
"null",
"number"
]
},
"speedMs": {
"type": [
"null",
"number"
]
},
"stoppingTimeSeconds": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"surface": {
"type": [
"null",
"string"
]
},
"totalStoppingDistanceFt": {
"type": [
"null",
"number"
]
},
"totalStoppingDistanceM": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}