Index onlineMerchant portal
Api Endpoint

Factline

Use when the user asks for the energy label of a Dutch home: the officially registered label (A++++ to G), registration and expiry date, building type and energy index, or a clear 'none registered'. Input: postcode + house number. Source: RVO EP-Online, the Dutch national register.

Open interactive test console

Offering

Provider
factline.dev
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Legal And Compliance
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://factline.dev/v1/energy-label
MIME type
application/json
First seen
2026-10-16T01:50:32.458Z
Last seen
Tags
netherlands, europe, energy-label, epc, esg, real-estate, property

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.005 USDC
Atomic price: 5000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0xb58dd178abac67f6d4894437a7fc725cbddb2075"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "fyqifu7otDYanhqr84B9YzZfA5LwRTJ1uFLqDJinMTK"
  }
]

Observed health

Status
Healthy
Latest latency
530 ms
Average latency
683 ms
HTTP status
402
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "postcode": {
          "type": "string",
          "description": "Dutch postcode, 4 digits + 2 letters, e.g. 3511LX",
          "pattern": "^[1-9][0-9]{3} ?[A-Za-z]{2}$"
        },
        "house_number": {
          "type": "integer",
          "description": "House number, e.g. 1",
          "minimum": 1
        },
        "house_letter": {
          "type": "string",
          "description": "Optional house letter, e.g. A"
        },
        "addition": {
          "type": "string",
          "description": "Optional house number addition, e.g. 2 or BIS"
        },
        "q": {
          "type": "string",
          "description": "Alternative to postcode: free-text address, e.g. 'Visschersplein 1 Utrecht'"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "addition": {
              "description": "Optional house number addition, e.g. 2 or BIS",
              "type": "string"
            },
            "house_letter": {
              "description": "Optional house letter, e.g. A",
              "type": "string"
            },
            "house_number": {
              "description": "House number, e.g. 1",
              "minimum": 1,
              "type": "integer"
            },
            "postcode": {
              "description": "Dutch postcode, 4 digits + 2 letters, e.g. 3511LX",
              "pattern": "^[1-9][0-9]{3} ?[A-Za-z]{2}$",
              "type": "string"
            },
            "q": {
              "description": "Alternative to postcode: free-text address, e.g. 'Visschersplein 1 Utrecht'",
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}