Computes mean NDVI and an ordinary least-squares daily NDVI trend, then applies
Computes mean NDVI and an ordinary least-squares daily NDVI trend, then applies yield = intercept + mean_coefficient×mean_NDVI + trend_coefficient×daily_trend. It does not derive NDVI from imagery, account for crop stage or weather, or provide an agronomically calibrated forecast unless the caller supplies valid coefficients.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
889 msmedian answer time
$0.003listed price per call
$0.003price 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
POST https://space.halowerk.com/v1/crop-yield-ndvi
| Category | Everything else |
|---|---|
| Provider host | space.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 889 ms |
Example input (from the provider)
{
"body": {
"observations": [
{
"day_after_planting": 30,
"ndvi": 0.38
},
{
"day_after_planting": 45,
"ndvi": 0.57
},
{
"day_after_planting": 60,
"ndvi": 0.68
},
{
"day_after_planting": 75,
"ndvi": 0.7
}
],
"yield_intercept": 1.2,
"yield_per_daily_ndvi_trend": 35,
"yield_per_mean_ndvi": 8.5,
"yield_unit": "tonnes_per_hectare"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"observations": {
"items": {
"additionalProperties": false,
"properties": {
"day_after_planting": {
"maximum": 10000,
"minimum": 0,
"type": "integer"
},
"ndvi": {
"maximum": 1,
"minimum": -1,
"type": "number"
}
},
"required": [
"day_after_planting",
"ndvi"
],
"type": "object"
},
"maxItems": 10000,
"minItems": 2,
"type": "array"
},
"yield_intercept": {
"maximum": 1000000000000,
"minimum": -1000000000000,
"type": "number"
},
"yield_per_daily_ndvi_trend": {
"maximum": 1000000000000000,
"minimum": -1000000000000000,
"type": "number"
},
"yield_per_mean_ndvi": {
"maximum": 1000000000000,
"minimum": -1000000000000,
"type": "number"
},
"yield_unit": {
"maxLength": 64,
"minLength": 1,
"type": "string"
}
},
"required": [
"observations",
"yield_intercept",
"yield_per_mean_ndvi",
"yield_per_daily_ndvi_trend",
"yield_unit"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}