MI
Developer Tool · x402 · early usage
Circular direction of the dominant surface gradient, clockwise from north
Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.
by mitteleuropa.halowerk.com · discovered, not yet claimed by its owner · updated 2026-09-03
30d calls1
30d payers1
MethodHTTP
Outputjson schema
Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.
What it does
Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.
Tags: bazaar · payment-identifier
Call contract
- Method
- HTTP
- Input
- HTTP request
- Output
- json schema
- Last paid call
- 2026-09-03
No input exampleProvider did not publish one in Bazaar metadata.
No output exampleProvider did not publish one in Bazaar metadata.
Use with an agent
- Discover. Agents find this listing with
GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP toolsearch_resources, or/discovery/resources. - Inspect. Fetch
/resources/11405.jsonfor the price and payment options. - Pay. Call
GET https://mitteleuropa.halowerk.com/v1/at-aspect. The provider answers402with its payment requirements. An x402 client signs one of the options below and retries withPAYMENT-SIGNATURE. - Execute. The provider returns
200with the data. Agent Bazaar is not in the request path and never sees your payment.
For humans
You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.
Pricing & payment
- Price
- $0.001 / request
- Protocol
- x402 v2
- Auth
- No account or API key. Pay per request.
- Networks
- Base
- Demand
- 1 calls · 1 unique payers in 30d (public x402 Bazaar data)
x402 payment requirements
| Scheme | Network | Asset | Amount | Pay to | Timeout |
|---|---|---|---|---|---|
| exact | Base eip155:8453 | USDC | $0.001 | 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E | 300s |
accepts[] (raw JSON)
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000",
"amountUsd": 0.001,
"maxTimeoutSeconds": 300
}
]Schemas
Output schema (JSON Schema)
{
"bazaar": {
"info": {
"input": {
"body": {
"latitude": 48.2082,
"longitude": 16.3738
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"authoritative_status": "preliminary_non_binding",
"category": "country",
"caveats": [
"Preliminary geodata assessment; not a legally binding property, cadastral, planning, environmental or title search.",
"Raster resolution and model uncertainty can be larger than the submitted site geometry.",
"Material decisions require a current verification by the competent national or regional authority."
],
"charged": true,
"checked_at": "2026-09-03T00:00:00.000Z",
"confidence": 0.85,
"confidence_method": "Conservative minimum source-family baseline plus a bounded sample-count bonus; multi-source results receive a fixed integration penalty.",
"data_date": "2015-12-31T23:59:59.000Z",
"evidence": {
"aspect": {
"method": "documented source raster sample",
"metric": "aspect",
"name": "Dominant aspect",
"sample_count": 1,
"unit": "degree",
"value": 1
}
},
"evidence_classification": "derived_from_open_geodata",
"facts": {
"measurements": {
"aspect": {
"method": "documented source raster sample",
"metric": "aspect",
"name": "Dominant aspect",
"sample_count": 1,
"unit": "degree",
"value": 1
}
}
},
"generated_at": "2026-09-03T00:00:00.000Z",
"geometry": null,
"limitations": [
"Preliminary geodata assessment; not a legally binding property, cadastral, planning, environmental or title search.",
"Raster resolution and model uncertainty can be larger than the submitted site geometry.",
"Material decisions require a current verification by the competent national or regional authority."
],
"payment": {
"price_usdc": 0.001,
"settled": true
},
"recommended_next_steps": [
"Verify material findings with current cadastral, planning and environmental records from the competent authority.",
"Commission a qualified on-site survey where parcel-scale conditions affect the decision."
],
"result": "measurement_available",
"risk_level": "not_applicable",
"service": "at-aspect",
"service_id": "eli-0379",
"sources": [
{
"attribution": "© DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.",
"authority": "European Union Copernicus Programme / ESA / DLR / Airbus",
"cache_policy": "HTTP byte ranges only; bounded 2 GB derived block cache, no whole-dataset copy.",
"caveats": [
"Digital surface model: vegetation and structures can raise the measured surface above bare earth.",
"Values over water and source voids may be unavailable."
],
"commercial_use": true,
"commercial_use_allowed": true,
"coverage": "Global land surface; requests are restricted to the 30 published European countries.",
"data_date": "2015-12-31T23:59:59.000Z",
"data_period": "TanDEM-X acquisition period 2011-2015; this is not a current-condition survey.",
"dataset": "Copernicus DEM GLO-30 Full, Free & Open",
"freshness": "Pinned COP-DEM-GLO-30-F product.",
"id": "copernicus-dem-glo30-f",
"license": "COP-DEM-GLO-30-F Full, Free & Open licence",
"license_status": "verified",
"license_verified_at": "2026-09-03",
"name": "Copernicus DEM GLO-30 Full, Free & Open",
"provider": "European Union Copernicus Programme / ESA / DLR / Airbus",
"purpose": "Surface elevation and deterministic terrain derivatives.",
"rate_limit": "AWS Open Data endpoint; local per-request timeout and circuit breaker apply.",
"redistribution": true,
"resolution": "30 metres",
"retrieved_at": "2026-09-03T00:00:00.000Z",
"source_url": "https://copernicus-dem-30m.s3.eu-central-1.amazonaws.com/",
"terms_url": "https://dataspace.copernicus.eu/sites/default/files/media/files/2025-06/copernicus_contributing_mission_data_access_v2_cop_dem_licenses.pdf",
"update_interval": "Provider product release based.",
"url": "https://copernicus-dem-30m.s3.eu-central-1.amazonaws.com/",
"version": "COP-DEM-GLO-30-F"
}
],
"status": "success",
"summary": "Austria: Dominant aspect: source-backed screening evidence was calculated successfully."
},
"type": "json"
}
},
"schema": {
"$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": {
"authoritative_status": {
"const": "preliminary_non_binding",
"type": "string"
},
"category": {
"const": "country",
"type": "string"
},
"caveats": {
"items": {
"type": "string"
},
"type": "array"
},
"charged": {
"type": "boolean"
},
"checked_at": {
"type": "string"
},
"confidence": {
"maximum": 1,
"minimum": 0,
"type": "number"
},
"confidence_method": {
"minLength": 20,
"type": "string"
},
"data_date": {
"type": [
"string",
"null"
]
},
"evidence": {
"additionalProperties": false,
"properties": {
"aspect": {
"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": [
"aspect"
],
"type": "object"
},
"evidence_classification": {
"const": "derived_from_open_geodata",
"type": "string"
},
"facts": {
"type": "object"
},
"generated_at": {
"type": "string"
},
"geometry": {
"type": [
"object",
"null"
]
},
"limitations": {
"items": {
"type": "string"
},
"minItems": 1,
"type": "array"
},
"meta": {
"type": "object"
},
"payment": {
"additionalProperties": true,
"required": [
"settled",
"price_usdc"
],
"type": "object"
},
"recommended_next_steps": {
"items": {
"type": "string"
},
"minItems": 1,
"type": "array"
},
"result": {
"minLength": 1,
"type": "string"
},
"risk_level": {
"type": "string"
},
"service": {
"const": "at-aspect",
"type": "string"
},
"service_id": {
"const": "eli-0379",
"type": "string"
},
"sources": {
"items": {
"additionalProperties": true,
"properties": {
"authority": {
"type": "string"
},
"dataset": {
"type": "string"
},
"license": {
"type": "string"
},
"retrieved_at": {
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"authority",
"dataset",
"url",
"license",
"retrieved_at"
],
"type": "object"
},
"minItems": 1,
"type": "array"
},
"status": {
"enum": [
"success",
"no_finding",
"warning",
"high_risk",
"not_applicable",
"insufficient_coverage",
"source_temporarily_unavailable"
],
"type": "string"
},
"summary": {
"minLength": 20,
"type": "string"
}
},
"required": [
"service_id",
"service",
"category",
"status",
"result",
"summary",
"facts",
"geometry",
"risk_level",
"confidence",
"confidence_method",
"checked_at",
"data_date",
"evidence",
"sources",
"limitations",
"recommended_next_steps",
"evidence_classification",
"authoritative_status",
"generated_at",
"caveats",
"charged",
"payment"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Example shape — generated from the schema, not a captured live response
nullExamples
curl
curl -X GET 'https://mitteleuropa.halowerk.com/v1/at-aspect'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATUREJavaScript
const res = await fetch("https://mitteleuropa.halowerk.com/v1/at-aspect", {
"method": "GET"
});
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.request("GET", "https://mitteleuropa.halowerk.com/v1/at-aspect")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerDetails
- Provider
- mitteleuropa.halowerk.com
- Endpoint
- https://mitteleuropa.halowerk.com/v1/at-aspect
- Machine-readable
/resources/11405.json