Difference between maximum and minimum sampled surface elevation
Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Finland; results outside it are rejected before payment.
Asked 3.0x its listed price for its own exampleour last check, 2026-09-24
1 of 1checks answered this week
351 msmedian answer time
$0.001listed 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://nordland.halowerk.com/v1/fi-local-relief
| Category | Everything else |
|---|---|
| Provider host | nordland.halowerk.com |
| Networks | eip155:8453 |
| 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 |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 351 ms |
Example input (from the provider)
{
"body": {
"latitude": 60.1699,
"longitude": 24.9384
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"latitude": {
"description": "WGS84 latitude inside the published European coverage.",
"maximum": 72.5,
"minimum": 34,
"type": "number"
},
"longitude": {
"description": "WGS84 longitude inside the published European coverage.",
"maximum": 40.5,
"minimum": -31.5,
"type": "number"
}
},
"required": [
"longitude",
"latitude"
],
"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"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"category": {
"const": "country",
"type": "string"
},
"caveats": {
"items": {
"type": "string"
},
"type": "array"
},
"charged": {
"type": "boolean"
},
"evidence": {
"additionalProperties": false,
"properties": {
"local-relief": {
"additionalProperties": true,
"properties": {
"method": {
"type": "string"
},
"metric": {
"type": "string"
},
"name": {
"type": "string"
},
"sample_count": {
"minimum": 1,
"type": "integer"
},
"unit": {
"type": "string"
},
"value": {
"type": "number"
}
},
"required": [
"metric",
"name",
"unit",
"value",
"sample_count",
"method"
],
"type": "object"
}
},
"required": [
"local-relief"
],
"type": "object"
},
"generated_at": {
"type": "string"
},
"geometry": {
"type": [
"object",
"null"
]
},
"meta": {
"type": "object"
},
"payment": {
"additionalProperties": true,
"required": [
"settled",
"price_usdc"
],
"type": "object"
},
"service": {
"const": "fi-local-relief",
"type": "string"
},
"service_id": {
"const": "eli-0031",
"type": "string"
},
"sources": {
"items": {
"type": "object"
},
"minItems": 1,
"type": "array"
},
"status": {
"const": "ok",
"type": "string"
}
},
"required": [
"service_id",
"service",
"category",
"status",
"geometry",
"evidence",
"sources",
"generated_at",
"caveats",
"charged",
"payment"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}