Prepare your NiceNIC account
Confirm reseller pricing if needed, get your API credentials and authorize the public outbound IP of your WHMCS server.
NiceNIC WHMCS Registrar Module WHMCS 9.0 supported
Sell and manage
domains in WHMCS.
Connect NiceNIC as your WHMCS domain registrar to handle domain availability checks, registrations, renewals, transfers and management from your existing WHMCS workflow.
No custom API build required Reseller pricing available
New to NiceNIC? Create an account → Need reseller pricing? View reseller options → Already set up? Open API Settings →
YOUR WORKFLOW, CONNECTED
WHMCS
Your customer platform
Customer accountsBilling & invoicesHosting services
NiceNIC registrar module
NICENIC
Your domain registrar connection
RegisterRenewTransfer
Register · Renew · Transfer · Manage
Quick start
Connect NiceNIC to WHMCS in three stages.
Use this short path if you already know WHMCS. The full installation guide below covers credentials, TLD pricing, automation and testing in detail.
Download the registrar module
Choose the published package that matches your WHMCS environment, then keep a backup before replacing an existing module.
Install and verify one order
Activate NiceNIC in WHMCS, configure the connection and verify one controlled live order before increasing volume.
WHMCS domain registrar integration
Run domain operations from WHMCS.
Use the NiceNIC registrar module inside the WHMCS workflow your team and customers already use.
What is the NiceNIC WHMCS Registrar Module? It connects WHMCS to NiceNIC for supported domain availability checks, registrations, renewals, transfers and domain management. It is designed for businesses that want to operate NiceNIC domain services from an existing WHMCS workflow without building a custom registrar integration.
ICANN-accredited since 2006IANA Registrar ID 3765.
WHMCS 9.0 supportedNiceNIC supports the current WHMCS 9.0 release line.
Reseller options availableUse reseller pricing for your domain business.
Human integration supportGet help with account-specific integration issues.
Sell domains
- Check domain availability
- Register new domain names
- Transfer eligible domains
Manage your portfolio
- Process domain renewals
- Update nameservers
- Maintain domain contact details
Support your customers
- Retrieve domain information
- Lock or unlock supported domains
- Retrieve Auth/EPP codes where supported
Built for domain resellers using WHMCS. Suitable for hosting providers, domain resellers, agencies and other businesses that sell domains through WHMCS.
Available operations depend on the extension, domain status and registry requirements. View the WHMCS compatibility update →
Choose the right integration
WHMCS module or Domain API?
Use the WHMCS module when WHMCS is already your customer and billing platform. Use the Domain API when you are building your own panel, automation or custom workflow.
Already use WHMCS?
Install the NiceNIC registrar module. No custom registrar integration is required for the supported WHMCS workflow.
Download WHMCS ModuleBuilding your own system?
Use the NiceNIC Domain API for software, control panels and automation outside WHMCS.
Explore Domain APIFree Domain API access
Use NiceNIC Domain API tools without a separate API access fee. Your account pricing still applies to domain orders.
Explore Domain APINo setup or annual reseller fee
Your reseller deposit is added to your account balance and can be used to pay for domain and other supported service orders.
View payment optionsReseller pricing for growing volume
Choose the reseller level that fits your TLD mix and domain volume. Your reseller prices then apply according to your account level and TLD.
Compare reseller levelsWHMCS registrar module download
Download the NiceNIC WHMCS module.
Select the package for your WHMCS environment, then follow the installation guide.
NiceNIC WHMCS Registrar Module
Connect supported domain operations to WHMCS.
Compatibility statusWHMCS 9.0 release line supported
Published packagesStandard + WHMCS V8+ packages
Compatibility updateSeptember 8, 2026
Which package should I use? NiceNIC currently publishes the two packages below. WHMCS 9.0 support does not by itself identify which ZIP fits every existing environment, so confirm the correct package before replacing a production module. Ask Integration Support →
NiceNIC supports the WHMCS 9.0 release line. If you are upgrading an existing installation, confirm the correct package for your environment and keep a backup before replacing the module.
Not sure which package to use? Ask NiceNIC integration support.
WHMCS installation & configuration
How to connect NiceNIC to WHMCS.
Follow these six steps to install the registrar module, connect your NiceNIC account and verify your first domain order.
Follow the steps in order
01Set up your NiceNIC reseller account and API access
Reseller account, API credentials and authorized server IP.
Set up your NiceNIC reseller account and API access
Reseller account, API credentials and authorized server IP.
NiceNIC WHMCS onboarding is designed for reseller use. Review the Reseller Program, then sign in and open API Settings to create or retrieve your API Secret.
Authorize the public outbound IP of your WHMCS server. It may differ from the website or CDN address. Your hosting provider can confirm it.
Already have a NiceNIC account? Review your reseller level before going live so you know which reseller prices apply to your TLDs and volume.
02Upload and activate the module
Place the module in the right folder.
Upload and activate the module
Place the module in the right folder.
Extract the approved package. Place its nicenic folder in your existing WHMCS registrar-module directory, without adding an extra nested folder.
/path/to/whmcs/modules/registrars/nicenic/In the WHMCS 9.0 admin area, open Domain Registrars and activate NiceNIC:
Configuration → System Settings → Domain Registrars → NiceNIC → Activate
Replace /path/to/whmcs/ with the location of your installation. Back up the existing module before replacing it.
03Configure the NiceNIC connection
Save your username and API Secret.
Configure the NiceNIC connection
Save your username and API Secret.
Open the NiceNIC module settings in WHMCS. Enter your NiceNIC API credentials and save the configuration.
- Username
- Your NiceNIC API username.
- API Secret
- The secret from API Settings, not your website sign-in password.
- Test Mode
- Use only as documented for the installed package and intended test environment.
API keys belong in the server-side module configuration. Never include a secret in a public screenshot or client-side code.
04Choose your TLDs and set selling prices
Check registrar mapping, terms and currencies.
Choose your TLDs and set selling prices
Check registrar mapping, terms and currencies.
In WHMCS Domain Pricing, select the extensions you plan to sell and set NiceNIC as the registrar for those new orders. Review registration, renewal and transfer prices separately.
Check permitted terms, required contact fields and TLD eligibility. Compare your WHMCS selling currency and exchange-rate settings with the NiceNIC account cost. Review premium-domain handling before offering premium names.
Set your WHMCS selling prices separately. Installing the registrar module does not automatically configure your retail pricing. Review your NiceNIC account costs and keep enough balance for live domain orders.
05Check automation and order handling
Verify cron, logging and renewal settings.
Check automation and order handling
Verify cron, logging and renewal settings.
For self-hosted WHMCS, configure the cron job using the command shown by your installation. WHMCS recommends running it every five minutes. Check that scheduled tasks complete and that the command-line PHP environment meets WHMCS requirements.
Review renewal settings and module logs. A customer payment and a completed registrar operation are separate events. Reconcile both before marking a domain order complete.
A timeout does not prove an order failed. Check the domain and transaction status in NiceNIC before attempting the same paid action again. See pending orders and timeouts.
06Test the connection, then place one live order
Verify the result before increasing volume.
Test the connection, then place one live order
Verify the result before increasing volume.
Begin with read-only checks, such as domain availability or existing domain information. Verify authentication, the returned result and error handling.
The API Sandbox is a separate environment for direct API development. Do not assume that a WHMCS Test Mode setting connects to it. Confirm the installed module's test instructions before attempting registrations, renewals or transfers.
When ready, verify live settings and account balance, then run one controlled paid order. Confirm the domain's final state, the WHMCS order record and the NiceNIC transaction before increasing volume.
Troubleshooting
Find the issue. Take the next step.
Start with the symptom you see in WHMCS. Keep the exact error message for any account-specific review.
NiceNIC does not appear in the registrar list
Check the module folder location, extra nesting after extraction, readable file permissions and your PHP environment. Confirm you installed the package intended for your WHMCS release.
Authentication fails or returns an unauthorized error
Recheck the NiceNIC username and API Secret, then confirm the authorized outbound server IP. Check for accidental spaces and make sure you did not enter the website login password in place of the API Secret.
An order is pending, or the request timed out
The API response body uses code: 201 for pending processing. An accepted order is not necessarily a completed registration or transfer.
Review the WHMCS log, then verify the domain and transaction state in NiceNIC. Do not repeat a paid operation while its outcome is unknown. Ask support to trace the original request when needed.
The selling price, registrar cost or balance does not match
Compare the same TLD, operation, term and currency. Check account tier, renewal versus registration pricing, premium status and any currency conversion. Customer payment in WHMCS does not by itself prove that the corresponding NiceNIC registrar order was funded.
Scheduled tasks or renewals are not running as expected
Review WHMCS automation status, cron execution, renewal settings and the affected domain's registrar assignment. Check that the cron process uses the expected PHP configuration and that the account has enough funds for the requested action.
WHMCS integration FAQ
Common WHMCS questions.
Answers about reseller accounts, testing, existing domains and WHMCS compatibility.
Ask an integration questionDo I need to build a custom API integration?
No. The registrar module provides the WHMCS connection. The Domain API documentation is there for deeper technical reference or workflows you build outside WHMCS.
Do I need a NiceNIC reseller account for WHMCS?
NiceNIC WHMCS onboarding is designed for reseller use. A reseller account also lets you use the reseller pricing assigned to your account for supported domain orders. Review the NiceNIC Reseller Program before enabling production orders.
Can I keep my existing registrar while testing NiceNIC?
Yes. Begin with selected new registrations and retain your existing registrar workflow for the rest of your portfolio. Review the registrar assignment for each TLD and existing domain. Installing the module does not transfer your existing domains to NiceNIC.
Is the API Sandbox the same as WHMCS Test Mode?
Do not treat them as interchangeable. The API Sandbox serves direct API testing. WHMCS Test Mode behavior depends on the installed module. Follow its package-specific instructions and confirm the target environment before any operation that creates or changes a domain.
Is prepaid account credit a membership fee?
No. Under the NiceNIC Reseller Program, your prepaid reseller balance remains available for domain and other supported service orders; it is not consumed as a membership fee. WHMCS licensing and any hosting costs remain separate.
Which WHMCS and PHP versions should I use?
NiceNIC has announced support for the WHMCS 9.0 release line. Select the approved module package for your installation and follow WHMCS's current system requirements for PHP and ionCube. Test other themes, hooks and extensions separately before a production upgrade.
Which NiceNIC WHMCS module package should I download?
Use the published package that matches your WHMCS environment. NiceNIC currently provides a standard module package and a V8+ package. If you are upgrading or replacing an existing production module and are unsure which package applies, keep a backup and confirm the package with NiceNIC integration support before replacement.
Does installing the module automatically change my retail domain prices?
No. Configure your WHMCS selling prices separately. Installing or activating the registrar module does not automatically set your retail prices. Review your NiceNIC account costs, the operation type and your own selling currency before going live.
Do I need funds in my NiceNIC balance before a live WHMCS order?
For a paid registrar action, keep enough available balance in the NiceNIC account to cover the live order. A customer payment recorded in WHMCS is separate from the registrar-side transaction.
Where do I find my NiceNIC API Secret?
Sign in to NiceNIC and open API Settings. Use the API Secret there for the server-side module configuration. Do not use your website sign-in password as the API Secret, and do not expose the secret in screenshots or client-side code.
What should I do if a WHMCS domain request stays pending?
A pending response is not proof that the operation failed. Check the domain and transaction status in NiceNIC before repeating a paid action. If the result is still unclear, keep the original timestamp and error details and ask support to trace the first request.
Ready to sell domains
through WHMCS?
Choose a NiceNIC reseller option, connect the WHMCS registrar module and verify your first live domain order.
Already set up? Open API Settings →
