Blockchain Data · x402

Share of ESA WorldCover 2021 pixels classified as tree cover

Share of ESA WorldCover 2021 pixels classified as tree cover. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

by mitteleuropa.halowerk.com · discovered, not yet claimed by its owner · updated 2026-09-03

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

Share of ESA WorldCover 2021 pixels classified as tree cover. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

Tags: bazaar · payment-identifier

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/11344.json for the price and payment options.
Pay. Call GET https://mitteleuropa.halowerk.com/v1/cz-tree-cover-share. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with 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
Calls (30d): 1 · 1 unique payers (third-party data from the public x402 Bazaar)

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": 50.0755,
          "longitude": 14.4378
        },
        "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": 0.81,
          "confidence_method": "Conservative minimum source-family baseline plus a bounded sample-count bonus; multi-source results receive a fixed integration penalty.",
          "data_date": "2021-12-31T23:59:59.000Z",
          "evidence": {
            "tree-cover-share": {
              "method": "documented source raster sample",
              "metric": "tree-cover-share",
              "name": "Tree-cover share",
              "sample_count": 1,
              "unit": "percent",
              "value": 1
            }
          },
          "evidence_classification": "derived_from_open_geodata",
          "facts": {
            "measurements": {
              "tree-cover-share": {
                "method": "documented source raster sample",
                "metric": "tree-cover-share",
                "name": "Tree-cover share",
                "sample_count": 1,
                "unit": "percent",
                "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": "cz-tree-cover-share",
          "service_id": "eli-0473",
          "sources": [
            {
              "attribution": "© ESA WorldCover project 2021 / Contains modified Copernicus Sentinel data (2021) processed by ESA WorldCover consortium.",
              "authority": "European Space Agency",
              "cache_policy": "Remote Cloud Optimized GeoTIFF byte ranges; no whole-dataset redistribution.",
              "caveats": [
                "Categorical remote-sensing map with classification uncertainty.",
                "Not a cadastral, planning-law or permit dataset."
              ],
              "commercial_use": true,
              "commercial_use_allowed": true,
              "coverage": "Global 2021 land-cover map; valid source tiles are required at the submitted geometry.",
              "data_date": "2021-12-31T23:59:59.000Z",
              "data_period": "2021 mapping year.",
              "dataset": "ESA WorldCover 2021",
              "freshness": "Historical 2021 v200 observation product; not a live land-use register.",
              "id": "esa-worldcover-2021",
              "license": "CC BY 4.0",
              "license_status": "verified",
              "license_verified_at": "2026-09-03",
              "name": "ESA WorldCover 2021",
              "provider": "European Space Agency",
              "purpose": "Current-suite land-cover classes and area shares.",
              "rate_limit": "ESA public object store; local timeout, retry and circuit breaker apply.",
              "redistribution": true,
              "resolution": "10 metres",
              "retrieved_at": "2026-09-03T00:00:00.000Z",
              "source_url": "https://esa-worldcover.s3.eu-central-1.amazonaws.com/v200/2021/map/",
              "terms_url": "https://esa-worldcover.org/en/data-access",
              "update_interval": "Annual historical product; version v200 is pinned for reproducible results.",
              "url": "https://esa-worldcover.s3.eu-central-1.amazonaws.com/v200/2021/map/",
              "version": "v200"
            }
          ],
          "status": "success",
          "summary": "Czechia: Tree-cover share: 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": {
                    "tree-cover-share": {
                      "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": [
                    "tree-cover-share"
                  ],
                  "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": "cz-tree-cover-share",
                  "type": "string"
                },
                "service_id": {
                  "const": "eli-0473",
                  "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

null

Examples

curl

curl "https://mitteleuropa.halowerk.com/v1/cz-tree-cover-share"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://mitteleuropa.halowerk.com/v1/cz-tree-cover-share");
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.get("https://mitteleuropa.halowerk.com/v1/cz-tree-cover-share")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: mitteleuropa.halowerk.com
Endpoint: https://mitteleuropa.halowerk.com/v1/cz-tree-cover-share
Machine-readable: /resources/11344.json