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OnlineNIC API

Freemium#15 of 24 in Domain Registration APIs

OnlineNIC API: A free-core registrar API covering key domain operations for reseller platforms. Ranked #15 of 24 in Domain Registration APIs by our editors (7.6/10); pricing: Free plan; best for API-only teams needing free core registrar operations.

7.6/10Editor score

Visit OnlineNIC

OnlineNIC API7.6 Visit OnlineNIC

At a glance

Editor score
7.6 / 10
Pricing
Free plan
Best for
API-only teams needing free core registrar operations
Free plan
Yes
Domain search API
Yes
Founded
1996 · Oakland, California, USA
Facts checked
20 Sep 2026

Where it wins
- Free API access covers core registrar operations
- Includes transfers, renewals, DNS, locks, and contact management
- Provides separate live and test API endpoints
Where it doesn't
- API-only platform with no integrations listed
- Domain operations use pay-per-use pricing
- Bulk API requests and workflows are not documented

Our verdict on OnlineNIC API

OnlineNIC API is a reseller-facing domain registration and management service for domain resellers, hosting companies, and businesses managing domain portfolios programmatically. It supports availability and price checks, registrations, renewals, transfer-in initiation and status management, premium-domain pricing, DNS updates, domain locks, contact management, and authentication-code handling. The product is delivered through an API and includes a test environment for development and integration work.

Pricing is structured around a free API service and pay-per-use domain operations rather than a recurring API subscription. Domain prices are published by top-level domain and reseller tier, so operational costs depend on the domains and pricing tiers involved. The free core covers a broad set of registrar functions, including availability checks, registration, renewal, transfers, premium-domain pricing, DNS, locks, contacts, and testing. This model fits teams that want to build domain workflows into their own websites or business platforms while paying for domain activity as it occurs.

The main strength is breadth within registrar operations: teams can manage the domain lifecycle from availability checks through registration, renewal, transfer, DNS, and account-related controls. OnlineNIC was founded in 1996, and the API guide documents separate live and test endpoints. The trade-off is a narrow ecosystem fit: the product is API-only, with no integrations listed, and the published guide does not document a bulk API request or workflow. Choose OnlineNIC API when direct registrar automation and free core access are priorities. Consider an alternative if prebuilt integrations or documented bulk workflows are central requirements.

Your product? Our editors can test OnlineNIC API in depth and publish a review, labelled as paid · from $149/mo →

OnlineNIC API pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.

See plans on onlinenic.com

OnlineNIC API fact sheet

Free plan	Yes
Paid from	Not verified
Domain search API	Yes
Bulk registration	Not verified
Transfer management	Yes
Renewal management	Yes
Premium domains	Yes
Sandbox environment	Yes
Deployment	Cloud
Support	Email, Live chat, Tickets, Docs · 24/7
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Free plan (source)
Website	onlinenic.com
Facts checked	20 Sep 2026

Alternatives to OnlineNIC API

See all OnlineNIC API alternatives →

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Featured on iTechGuides

OnlineNIC API is listed in our Domain Registration APIs directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update