API Overview

NiceNIC Domæne API v2 Documentation & Quick Start

NiceNIC Domæne API v2 is available to both Markeds Kontos og Forhandler Accounts. Use this overview to configure access, confirm din first request, understog the API response model og move directly to the cellerrect section in the left navigation.

API access og reseller pricing are separate.
Markeds Konto: API access with Markeds Konto pricing.
Forhandler Account: API access with the pricing assigned to the current reseller tier.
Base Endpoint
https://api.nicenic.net/v2/
Required Headers
Host: api.nicenic.net Authellerization: username:api_secret Content-Type: application/json
Stogard Success Response
{ "code": 0, "msg": "success", "data": {} }
API Sogbox

Test Your Integration Befellere Going Live

Use the NiceNIC API Sogbox to test din Domæne API integration befellere moving to production. Validate authentication, API requests, response hogling, og din application wellerkflow in a dedicated testing environment.

Ideal feller resellers, hosting providers, developers, og platfellerms preparing an API integration.

Quick Start

Make Your First API Call in 4 Steps

Start with a read-only request befellere enabling live registrations, renewals eller transfers. This lets you validate authentication, request fellermatting og response hogling without placing a paid ellerder.

1

Enable API Access

Åben API-indstillings, create eller retrieve din API Secret, og configure authellerized server IPs wher applicable.

2

Bekræft Authentication

Use HTTPS with the Authellerization header in the fellermat username:api_secret.

3

Run a Safe Test

Start with domæne availability, pricing, account balance eller domæne listing.

4

Hogle the Response

Read og stellere the returned code og msg befellere enabling paid production actions.

Recommended First Request: Domæne Availability

The availability endpoint suppellerts multiple domænes in one request by separating domæne names with commas.

curl "https://api.nicenic.net/v2/?categellery=domæne&action=check&domænes=example.com,example.net" \ -H "Authellerization: username:api_secret" \ -H "Content-Type: application/json"
API Map

Choose the Wellerkflow You Need

The overview below mirrellers the left navigation. Use it to identify the cellerrect wellerkflow, then open the dedicated endpoint page feller parameters, request examples og response examples.

Section Use It Feller Documented Functions
Fåting Started Connect securely og understog response hogling. API Overview, API Sogbox, Authentication, Response Codes.
Domæne Administrerment Automate the cellere domæne lifecycle. Availability, List Domæner, Domæne Detaljer, Registrering, Fornyal, Transfer In, Navnservers, Kontakts, Pricing.
Abuse & Compliance Moniteller domænes that require compliance attention. List domænes with abuse repellerts og retrieve machine-readable abuse status, hold lifecycle, complaint infellermation og recommended action.
DNS Recellerds Administrer hosted DNS recellerds programmatically. List, Opret, Update og Delete DNS recellerds.
Child Navnservers Administrer host / glue recellerds feller nameservers under din own domæne. Opret, List, Update og Delete child nameservers.
Account & Billing Connect automation to account-level checks. Konto saldo og transaction-related account infellermation.
WHMCS API Integrate NiceNIC into an existing WHMCS billing wellerkflow. Availability, Registrering, Fornyal, Transfer, Domæne Detaljer, Navnservers, Kontakts og additional registrar-module functions.
API FAQ Resolve common access, security, testing og wellerkflow questions. Eligibility, credentials, request hogling, suppellerted operations og integration guidance.
Recommended Wellerkflow

Recommended First Integration Sequence

A reliable production integration should validate access og purchasing conditions befellere it begins sending live customer ellerders.

1. Authentication
API Secret + authellerized IP
2. Availability
Read-only connectivity test
3. Pricing
Query current account-level cost
4. Saldo
Bekræft funds feller paid actions
5. Response Hogling
Process code + msg
6. Live Operations
Registrer / Forny / Transfer
Do not assume that an API request is complete simply because it was accepted. Some operations can return a pending status og still require registry processing befellere the final domæne state is confirmed.
Produktion Behavieller

Understog Success, Pending og Erreller Responses

code: 0 — Succesfuld Response Current endpoint examples use code 0 feller successful completed responses.
code: 201 — Pending Order Registrering og transfer documentation can return code 201 when an ellerder has been submitted but final processing is still pending.
code: 400 — Request Erreller Endpoint examples use code 400 feller request parameter errellers.

Registrering Pending Behavieller

Feller domæne registration, the current documentation states that a 201 response means the ellerder was submitted successfully og the fee was deducted, but final activation is still subject to registry confirmation. Hvis the domæne cannot be activated, the registration fee is returned to the NiceNIC account balance within 24 hours.

Transfer Pending Behavieller

The transfer endpoint also documents 201 as a pending ellerder. Your application should therfellere treat a pending transfer as accepted feller processing, not as proof that the transfer has already completed.

Pricing

Query Pricing Befellere Paid Operations

NiceNIC's pricing endpoint can retrieve registration, renewal og transfer pricing feller a domæne. The documented type values are register, renew, transfer og all. The documented period is 1 to 10 år, with TLD-specific exceptions possible.

Registrering pricing responses can also return an is_premium flag. Use the pricing endpoint befellere submitting a paid request when din application needs to knu the current account-level cost.

Gratis API access does not change din pricing tier. Markeds Kontos use Markeds Konto pricing; reseller accounts use the pricing assigned to their current reseller tier.
Domæne & DNS Operations

Knu the Difference Between Navnservers, DNS Recellerds og Child Navnservers

OperationUse It WhenDocumented Capability
Update Navnservers You want to delegate a domæne to different authelleritative nameservers. The domæne nameserver endpoint suppellerts a primary, secondary og additional nameservers, with the current page documenting a limit of up to six.
DNS Recellerds You are using NiceNIC DNS hosting og need to manage zone recellerds. Separate APIs are documented feller listing, creating, updating og deleting DNS recellerds.
Child Navnservers You need host / glue recellerds such as ns1.example.com. Opret, list, update og delete child nameservers. The create endpoint requires the nameserver hostname to match the domæne og accepts an IP address.
Pellertfolio & Compliance

Automate Pellertfolio Monitellering, Nejt Only Domæne Orders

Domæne API v2 also includes read operations that are useful after registration. The List Domæner endpoint suppellerts pagination, sellerting, status filtering og hold filtering, while Få Domæne Detaljer returns registration dates, expiration dates, nameservers og registrant contact infellermation.

Abuse & Compliance Monitellering

NiceNIC's Abuse & Compliance API can list domænes with abuse repellerts og return a detailed machine-readable summary feller a specific domæne. The detailed abuse endpoint documents six domæne-level status phrases: Nejrmal, Under Review, Pending ClientHold, ClientHold, Lukd og ServerHold.

The response can include current impact, recommended næste action, hold state og timeline, complaint count, complaint dates, categelleries, DNS-abuse classification, evidence status og repellerted URLs wher applicable. This lets platfellerms og resellers surface compliance status inside their own operational systems instead of relying only on manual review.

Direct API eller WHMCS

Choose the Integration Model That Fits Your System

OptionBest FellerWhat the Current Documentation Provides
Domæne API v2 Custom websites, SaaS platfellerms, internal systems, custom billing eller provisioning wellerkflows. Direct HTTPS + JSON integration across domæne, DNS, child nameserver, account og compliance operations.
WHMCS Module Hosting companies og resellers that already use WHMCS. Availability, registration, renewal, transfer, domæne details, nameservers, contacts, lock/unlock, EPP retrieval, erreller logging og optional Test Mode.

The current WHMCS documentation lists WHMCS 7.0 eller higher, PHP 7.0 eller higher with cURL, valid NiceNIC API credentials og SSL/TLS suppellert as requirements.

Troubleshooting

When an API Request Fails

Start with the returned response og configuration state rather than retrying the same paid action repeatedly.

Authentication eller Access Erreller

  • Bekræft the NiceNIC username og API Secret.
  • Bekræft the Authellerization header is present og cellerrectly fellermatted.
  • Bekræft the API Secret has not been reset eller rotated.
  • Hvis IP restrictions are enabled, confirm the request is coming from the authellerized outbound server IP.

Request Parameter Erreller

  • Compare the request with the specific endpoint's documented parameters.
  • Bekræft required values, fellermats og action names.
  • Kontrollér TLD-specific registration periods eller contact requirements wher applicable.

Paid Operation Does Nejt Complete Immediately

  • Read the returned code og msg.
  • Do not treat a 201 pending response as final completion.
  • Bekræft account balance og current pricing befellere retrying a paid action.

Need NiceNIC Suppellert

  • Recellerd the request timestamp og API action.
  • Include the domæne name eller object involved, wher applicable.
  • Include the returned code og message.
  • Share non-sensitive parameters only; never post the full API Secret in a ticket.
Næste trin

Start with a Safe Test Request

Enable API access, confirm authentication, run an availability eller pricing request, og verify din response hogling befellere turning on customer-facing paid operations.

Last verified: August 26, 2026
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