4 Domains API: How to retrieve TLD specific data

This is a series of articles dedicated to demonstrating how to get acquainted with Openprovider Domains API methods. To get more information about our API in general, please use our documentation portal as your reference.

Additional domain fields (also commonly referred to as Extended Attributes) define the information required by domain registries for a given TLD.

While most extensions can be registered with just the basic contact data (company name, contact name, address, telephone number and e-mail address), several extensions require additional contact information in order to register a domain name. When a domain registry requires the information, a domain name will fail to register successfully unless the values are provided.

Typical information requested by domain registries include things such as Registrant Legal Type, Registered Entity Name, etc.

Entering Geo Fence iconUse endpoint path below. Base URL is determined by both the target environment and API version.

GET {base_url}/domains/additional-data/customers


Name Type Description
domain.extension string Required.


curl -X GET \
'https://api.cte.openprovider.eu/v1beta/domains/additional-data?domain.extension=no' \
-H 'Authorization: ,Bearer {{token}}' \


"code": 0,
"data": [
"description": "IDN script states what language or character set the domain name is in",
"name": "idnScript",
"options": [
"description": "Norwegian",
"value": "no"
"required": false,
"type": "select"
"desc": ""


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