OnlineNIC, Inc. is an ICANN-accredited domain registrar (IANA ID 82) and wholesale reseller platform, operating since 1999, that sells domain names across roughly 400 TLDs, SSL/TLS certificates from DigiCert, GeoTrust, RapidSSL, Sectigo and Symantec, business email, reseller and cloud hosting, escrow and domain-privacy services. It publishes a partner-facing Reseller API — currently build 4.0.9 — that lets resellers register, renew, transfer and manage domains, manage contacts, nameservers and EPP auth codes, apply ID Shield registrant privacy, run Whois verification, and order, reissue, cancel and revoke SSL certificates. The API is an RPC surface over HTTPS with a JSON envelope; the contract is published only as a PDF reference guide, with no OpenAPI or other machine-readable description.
OnlineNIC is listed with 1 API on the APIs.io network. Tagged areas include Domains, Domain Registration, Registrar, DNS, and SSL Certificates.
OnlineNIC’s developer surface includes signup flow, pricing, support, engineering blog, authentication, changelog, sandbox, and 19 more developer resources.
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never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
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Agent readiness — checks not met, largest first (exact, from this profile):
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card+8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples+7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
10 more unmet checks in the Agent Readiness table above.
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not part of the Kin Score or agent readiness.
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Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
The OnlineNIC Reseller API (build 4.0.9) gives partners programmatic control of the OnlineNIC product catalogue. Twenty-six domain commands cover availability checking, registra...
aid: onlinenic
name: OnlineNIC
description: OnlineNIC, Inc. is an ICANN-accredited domain registrar (IANA ID 82) and wholesale reseller platform, operating
since 1999, that sells domain names across roughly 400 TLDs, SSL/TLS certificates from DigiCert, GeoTrust, RapidSSL, Sectigo
and Symantec, business email, reseller and cloud hosting, escrow and domain-privacy services. It publishes a partner-facing
Reseller API — currently build 4.0.9 — that lets resellers register, renew, transfer and manage domains, manage contacts,
nameservers and EPP auth codes, apply ID Shield registrant privacy, run Whois verification, and order, reissue, cancel and
revoke SSL certificates. The API is an RPC surface over HTTPS with a JSON envelope; the contract is published only as a
PDF reference guide, with no OpenAPI or other machine-readable description.
type: Index
deliveryModel:
model: unknown
open_source: false
commercial: true
callable_host: true
label: Commercial partner API on a callable host; no product licence on record
confidence: medium
source:
- probe
generated: '2026-09-17'
method: derived
accessModel:
pricing: free-with-account
onboarding: account-required
trial: true
try_now: false
public: false
label: Free API access with a reseller account; documented OTE test environment
confidence: high
source:
- plans
- docs
generated: '2026-09-17'
method: searched
position: Producing
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/onlinenic.png
tags:
- Domains
- Domain Registration
- Registrar
- DNS
- SSL Certificates
- Certificates
- Reseller
- Hosting
- Security
created: '2025-02-09'
modified: '2026-09-17'
url: https://raw.githubusercontent.com/api-evangelist/onlinenic/refs/heads/main/apis.yml
specificationVersion: '0.23'
common:
- type: FinOps
url: finops/onlinenic-finops.yml
- type: Website
url: https://www.onlinenic.com/
- type: DeveloperPortal
url: https://www.onlinenic.com/cp_english/template_api/api_help.php
- type: SignUp
url: https://www.onlinenic.com/en/Home/register.html
- type: Login
url: https://www.onlinenic.com/en/Home/login.html
- type: Pricing
url: https://www.onlinenic.com/en/Domains/index/19.html
- type: Support
url: https://helpdesk.onlinenic.com/portal/en/home
- type: Blog
url: https://www.onlinenic.com/en/News/index.html
- type: TermsOfService
url: https://www.onlinenic.com/en/Content/content/118.html
- type: PrivacyPolicy
url: https://onlinenic.com/OnlineNIC_PRIVACY_Statement.pdf
- type: LinkedIn
url: https://www.linkedin.com/company/onlinenic-inc-
- type: Packages
url: packages/onlinenic-packages.yml
- type: SDKs
url: packages/onlinenic-packages.yml
- type: Authentication
url: authentication/onlinenic-authentication.yml
- type: Conventions
url: conventions/onlinenic-conventions.yml
- type: ErrorCatalog
url: errors/onlinenic-error-codes.yml
- type: Lifecycle
url: lifecycle/onlinenic-lifecycle.yml
- type: ChangeLog
url: changelog/onlinenic-changelog.yml
- type: Conformance
url: conformance/onlinenic-conformance.yml
- type: DataModel
url: data-model/onlinenic-data-model.yml
- type: Sandbox
url: sandbox/onlinenic-sandbox.yml
- type: Plans
url: plans/onlinenic-plans-pricing.yml
- type: RateLimits
url: rate-limits/onlinenic-rate-limits.yml
- type: LLMsTxt
url: llms/onlinenic-llms.txt
- type: DomainSecurity
url: security/onlinenic-domain-security.yml
- type: X-MCPServerCandidate
url: mcp/onlinenic-mcp.yml
apis:
- aid: onlinenic:onlinenic
name: OnlineNIC Reseller API
description: The OnlineNIC Reseller API (build 4.0.9) gives partners programmatic control of the OnlineNIC product catalogue.
Twenty-six domain commands cover availability checking, registration, renewal, information, status and DNS updates, contact
objects, registrar transfer in and out, EPP auth codes, private nameservers, Whois verification and ID Shield registrant
privacy. Seventeen SSL commands cover CSR parsing, approver-email discovery, ordering, renewal, price and product lookup,
order query and listing, domain-control validation, reissue, cancellation with refund, certificate retrieval and revocation.
The surface is RPC over HTTPS — two PHP endpoints with a `command` query parameter, POST only — and every response is
HTTP 200 carrying a JSON envelope with an integer status code. Authentication is an API key plus a per-request MD5 token
over the reseller id, password digest, timestamp and command name, with an optional source-IP allowlist. The reference
is published as a PDF; there is no OpenAPI, AsyncAPI, GraphQL SDL or Postman collection.
humanURL: https://www.onlinenic.com/cp_english/template_api/api_help.php
baseURL: https://api.onlinenic.com/api4/
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/onlinenic.png
tags:
- Domains
- Domain Registration
- SSL Certificates
- Registrar
- Reseller
properties:
- type: Documentation
url: https://www.onlinenic.com/cp_english/template_api/api_help.php
- type: APIReference
name: API 4.0.9 Reseller Guide (PDF)
url: https://www.onlinenic.com/cp_english/template_api/download/Onlinenic_API_v4.0.9.2_Reseller_Guide.pdf
- type: X-APIReferenceLegacy
name: API 3.4 Usage Guide (PDF, deprecated)
url: https://onlinenic.com/cp_english/template_api/download/API_EN_Version_3.4.pdf
- type: SDKs
name: OnlineNIC PHP SDK (targets the deprecated 3.4 socket API)
url: https://www.onlinenic.com/cp_english/template_api/download.php?f=sdk_php.zip
- type: X-WHMCSModule
name: OnlineNIC Pro for WHMCS
url: https://www.onlinenic.com/en/Module/index/17.html
- type: X-TestEnvironment
name: OTE test environment (documented on the WHMCS module page)
url: https://www.onlinenic.com/en/Module/index/17.html
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
x-enrichment:
date: '2026-09-17'
status: enriched
artifacts_added: 12
pass: local-v3
OnlineNIC API — frequently asked questions
Does OnlineNIC have an API?
Yes. APIs.io lists 1 API from OnlineNIC, including OnlineNIC Reseller API.
How do I authenticate with the OnlineNIC API?
OnlineNIC uses bearer-token authentication (3 schemes). The details are profiled on APIs.io as Onlinenic Authentication.
How much does the OnlineNIC API cost?
OnlineNIC publishes its prices; its Platinum plan is $1129.00 as of 2026-09-17. APIs.io lists 4 pricing plans for OnlineNIC, with each plan's price, limits and inclusions under Pricing on this page.
Is the OnlineNIC API ready for AI agents?
OnlineNIC has a Kin Score of 36.7 out of 100 (thin) and an Agent Readiness score of 7.9 (agent-aware), scored by API Evangelist on 2026-11-06.
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