curl --request GET \
  --url https://api.e-invoice.be/api/lookup

const options = {method: 'GET'};

fetch('https://api.e-invoice.be/api/lookup', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.e-invoice.be/api/lookup"

response = requests.get(url)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.e-invoice.be/api/lookup",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

using RestSharp;


var options = new RestClientOptions("https://api.e-invoice.be/api/lookup");
var client = new RestClient(options);
var request = new RestRequest("");
var response = await client.GetAsync(request);

Console.WriteLine("{0}", response.Content);

{
  "queryMetadata": {
    "identifierScheme": "iso6523-actorid-upis",
    "identifierValue": "0208:1018265814",
    "smlDomain": "participant.sml.prod.tech.peppol.org",
    "timestamp": "2026-01-12T14:32:10.123456",
    "version": "1.0.0"
  },
  "status": "success",
  "errors": [
    "DNS lookup failed",
    "Business card not available"
  ],
  "dnsInfo": {
    "status": "success",
    "smlHostname": "participant.sml.prod.tech.peppol.org",
    "dnsRecords": [
      {
        "ip": "193.140.151.175"
      }
    ],
    "smpHostname": "smp.e-invoice.be",
    "error": "DNS lookup failed: no such domain",
    "lookupMethod": "naptr"
  },
  "serviceMetadata": {
    "status": "success",
    "queryTimeMs": 245.67,
    "endpoints": [
      {
        "status": "success",
        "url": "https://ap.e-invoice.be/as4",
        "documentTypes": [
          {
            "scheme": "busdox-docid-qns",
            "value": "urn:oasis:names:specification:ubl:schema:xsd:Invoice-2::Invoice##urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0::2.1"
          }
        ],
        "processes": [
          {
            "processId": {
              "scheme": "cenbii-procid-ubl",
              "value": "urn:fdc:peppol.eu:2017:poacc:billing:01:1.0"
            },
            "endpoints": [
              {
                "transportProfile": "peppol-transport-as4-v2_0",
                "address": "https://ap.e-invoice.be/as4",
                "serviceActivationDate": "2022-01-01T00:00:00Z",
                "serviceExpirationDate": "2025-01-01T00:00:00Z",
                "serviceDescription": "Company XYZ's AP service",
                "technicalContactUrl": "https://support.e-invoice.be",
                "technicalInformationUrl": "https://api.e-invoice.be",
                "certificate": {
                  "status": "success",
                  "details": {},
                  "error": "Certificate expired"
                }
              }
            ]
          }
        ],
        "error": "Connection timeout"
      }
    ],
    "error": "Service unavailable"
  },
  "businessCard": {
    "status": "success",
    "entities": [
      {
        "name": "Example Corporation Ltd",
        "countryCode": "NO",
        "registrationDate": "2021-06-15T00:00:00Z",
        "additionalInformation": [
          "VAT: BE1018265814",
          "Organization number: 1018.265.814"
        ]
      }
    ],
    "queryTimeMs": 123.45,
    "error": "Business card not found"
  },
  "certificates": [
    {
      "status": "success",
      "details": {},
      "error": "Certificate expired"
    }
  ],
  "executionTimeMs": 895.32
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}