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THE EVIDENCE BASE

Collected. Dated. Traceable.

Use the API
14,635Source listings
33Source snapshots
27,889Recorded changes
1,221Endpoint observations

Latest snapshot: Sep 12, 2026, 05:41 UTC. Daily collection; gaps remain unknown.

875 observations · Differences between dated observations.

mitteleuropa.halowerk.comMaximum adjacent-cell surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-max-slope
NetworkAdvertised amountBillingPayee
eip155:84530.001 USDC0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913Not specifiedexact0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Source and evidence
{
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  "url": "https://mitteleuropa.halowerk.com/v1/cz-max-slope",
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mitteleuropa.halowerk.comRelative runoff tendency derived from slope and ruggedness. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/at-drainage-tendency
NetworkAdvertised amountBillingPayee
eip155:84530.001 USDC0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913Not specifiedexact0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Source and evidence
{
  "description": "Relative runoff tendency derived from slope and ruggedness. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.",
  "domain": "mitteleuropa.halowerk.com",
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mitteleuropa.halowerk.comMean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-mean-slope
NetworkAdvertised amountBillingPayee
eip155:84530.001 USDC0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913Not specifiedexact0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
Source and evidence
{
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mitteleuropa.halowerk.comSouth-facing slope orientation index derived from aspect and slope. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-solar-orientation
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comCombined share of permanent water, herbaceous wetland and mangrove classes. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-water-wetland-share
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comShare of ESA WorldCover 2021 pixels classified as grassland. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/li-grassland-share
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comPositive difference between the neighborhood mean and center elevation. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-depression-depth
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mitteleuropa.halowerk.comMean SoilGrids pH in H2O for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-soil-ph
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mitteleuropa.halowerk.comMean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/li-soil-organic-carbon
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comShare of ESA WorldCover 2021 pixels classified as grassland. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-grassland-share
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mitteleuropa.halowerk.comShare of ESA WorldCover 2021 pixels classified as built-up. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-built-up-share
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comCombined share of permanent water, herbaceous wetland and mangrove classes. The coordinate is validated against the Natural Earth boundary for Slovenia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/si-water-wetland-share
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mitteleuropa.halowerk.comCircular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Slovenia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/si-aspect
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mitteleuropa.halowerk.comMean SoilGrids pH in H2O for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-soil-ph
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mitteleuropa.halowerk.comMean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Slovenia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/si-soil-organic-carbon
NetworkAdvertised amountBillingPayee
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mitteleuropa.halowerk.comCircular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/cz-aspect
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mitteleuropa.halowerk.comUSDA texture class calculated from SoilGrids sand, silt and clay fractions. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-soil-texture
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comCircular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/sk-aspect
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comMean SoilGrids sand fraction for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.
https://mitteleuropa.halowerk.com/v1/li-soil-sand
NetworkAdvertised amountBillingPayee
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Source and evidence
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mitteleuropa.halowerk.comCircular 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.
https://mitteleuropa.halowerk.com/v1/at-aspect
NetworkAdvertised amountBillingPayee
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Source and evidence
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          "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": {
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              },
              "checked_at": {
                "type": "string"
              },
              "confidence": {
                "maximum": 1,
                "minimum": 0,
                "type": "number"
              },
              "confidence_method": {
                "minLength": 20,
                "type": "string"
              },
              "data_date": {
                "type": [
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                  "null"
                ]
              },
              "evidence": {
                "additionalProperties": false,
                "properties": {
                  "aspect": {
                    "additionalProperties": true,
                    "properties": {
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                      "metric": {
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                      },
                      "name": {
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                      },
                      "sample_count": {
                        "minimum": 1,
                        "type": "integer"
                      },
                      "unit": {
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                      "value": {
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                    },
                    "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": {
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                },
                "minItems": 1,
                "type": "array"
              },
              "meta": {
                "type": "object"
              },
              "payment": {
                "additionalProperties": true,
                "required": [
                  "settled",
                  "price_usdc"
                ],
                "type": "object"
              },
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              "result": {
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                "type": "string"
              },
              "risk_level": {
                "type": "string"
              },
              "service": {
                "const": "at-aspect",
                "type": "string"
              },
              "service_id": {
                "const": "eli-0379",
                "type": "string"
              },
              "sources": {
                "items": {
                  "additionalProperties": true,
                  "properties": {
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                      "type": "string"
                    },
                    "dataset": {
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                    "retrieved_at": {
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                  },
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                    "retrieved_at"
                  ],
                  "type": "object"
                },
                "minItems": 1,
                "type": "array"
              },
              "status": {
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                ],
                "type": "string"
              },
              "summary": {
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            },
            "required": [
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              "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": [
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        ],
        "type": "object"
      }
    },
    "required": [
      "input"
    ],
    "type": "object"
  },
  "legacy_network": null,
  "legacy_pay_to": null,
  "legacy_price_basis": null,
  "legacy_price_usd": null,
  "metadata": null,
  "method": "POST",
  "observed_at": 1789191719.42,
  "offers": [
    {
      "amount": "0.001",
      "amount_atomic": "1000",
      "amount_encoding": "atomic_units",
      "amount_raw": "1000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "billing_unit": null,
      "billing_unit_basis": "commercial_terms_not_validated",
      "currency": "USDC",
      "decimals": 6,
      "decimals_basis": "known_token_mapping",
      "extra": {
        "asset": "USDC",
        "assetTransferMethod": "eip3009",
        "eip712Domain": {
          "chainId": 8453,
          "name": "USD Coin",
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        },
        "name": "USD Coin",
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      },
      "issuer": null,
      "network": "eip155:8453",
      "pay_to": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "price_basis": "advertised",
      "scheme": "exact",
      "timeout_seconds": 300,
      "usd_market_value": null
    }
  ],
  "operator_identity": "not_verified",
  "output_schema": null,
  "protocol": "x402",
  "protocol_version": 2,
  "quality": "not_evaluated",
  "run_id": "9895bd56e6d867a8f7f441d31e3c37014e6e211256019c569d02b946b0bc1b02",
  "schema_fingerprint": "23b4ae90cb4ac600b8e630b36c21bb3009f75a7ef728272cc1478ecb2fab4e02",
  "service_id": "ff3ca6b17c64ee6f09edba7b4db73f49f339ec4555dc03298c02175c4ca3b842",
  "source": "cdp-bazaar",
  "source_updated_at": "2026-09-03T18:32:45.048Z",
  "url": "https://mitteleuropa.halowerk.com/v1/at-aspect",
  "usage_rights": "not_reviewed"
}

Outcome evidence starts with your workflow.

Private intake is ready for task IDs, charges, retries, result fingerprints and your evaluation criteria. Public performance comparisons need measured results; we do not have that benchmark yet.

Discuss an outcome integration
Collection coverage

Discovery comes from configured registries. Endpoint checks record responses, not task success. Older snapshots retain less detail. Customer usage, commercial terms and task evaluations require additional evidence.

1,423 historical or current source records quarantined during normalization; they are excluded from public comparisons.

43 of 43 archive objects verified in Backblaze. Last verification: Sep 12, 2026, 05:56 UTC.

Collection status JSON