Labs64 NetLicensing Client (Python)

Python client library for the Labs64 NetLicensing RESTful API.

Built on Python 3.11+, httpx and Pydantic v2. Supports API-key and username/password authentication, automatic retries with exponential back-off, strongly-typed response models, and transparent pagination.

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Table of Contents

• Installation
• Quickstart
• Configuration and Authentication
• Services
  • Products
  • Product Modules
  • Licensees
  • Validation
  • License Templates
  • Licenses
  • Tokens
  • Bundles
  • Transactions
  • Payment Methods
  • Notifications
  • Utility
• Pagination and Iteration
• Error Handling
• Context Manager
• Models and Enums
• Custom Properties
• Demo
• Development
• References
• How to Contribute
• Bugs and Feedback
• License

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Installation

pip install netlicensing-client

For local development (installs test tools, type checker, and build utilities):

git clone https://github.com/Labs64/NetLicensingClient-python.git
cd NetLicensingClient-python
pip install -e ".[dev]"

---

Quickstart

from netlicensing import NetLicensingClient

# Authenticate with an API key (or set NETLICENSING_API_KEY in the environment)
client = NetLicensingClient(api_key="YOUR_API_KEY")

result = client.validation.validate(
    "CUSTOMER-1",
    product_number="PRODUCT-1",
    product_module_parameters={
        "MODULE-1": {"nodeSecret": "machine-or-device-id"},
    },
)

if result.is_valid():
    print("✅ License is valid")
else:
    print("❌ License is invalid or expired")

---

Configuration and Authentication

Constructor parameters take precedence over environment variables, which take precedence over defaults.

Environment variables

Variable	Default	Description
NETLICENSING_API_KEY	—	API key (recommended)
NETLICENSING_USERNAME	—	Username for basic auth
NETLICENSING_PASSWORD	—	Password for basic auth
NETLICENSING_VENDOR_NUMBER	—	Vendor number (informational)
NETLICENSING_BASE_URL	https://go.netlicensing.io/core/v2/rest	API base URL
NETLICENSING_TIMEOUT	30.0	Total request timeout in seconds
NETLICENSING_CONNECT_TIMEOUT	10.0	Connection timeout in seconds
NETLICENSING_RETRIES	2	Maximum retry attempts on transient errors
NETLICENSING_RETRY_BACKOFF	0.5	Base back-off in seconds (doubles per attempt)
NETLICENSING_VERIFY	true	Verify TLS certificates

export NETLICENSING_API_KEY="YOUR_API_KEY"
export NETLICENSING_VENDOR_NUMBER="VXXXXXXXX"

from netlicensing import NetLicensingClient

# No arguments needed — credentials are read from the environment
client = NetLicensingClient()

API-key authentication (recommended)

NetLicensing uses HTTP Basic Auth with username apiKey and the key as the password. Never hard-code API keys — use environment variables, deployment secrets, or a secrets manager.

client = NetLicensingClient(api_key="YOUR_API_KEY")

Username / password authentication

Suitable for trusted server-side contexts only.

client = NetLicensingClient(username="demo", password="demo")

Advanced constructor parameters

client = NetLicensingClient(
    api_key="YOUR_API_KEY",
    timeout=60.0,
    connect_timeout=15.0,
    retries=3,
    retry_backoff=1.0,
    headers={"X-Custom-Header": "value"},
)

---

Services

The client exposes one service attribute per NetLicensing resource:

Attribute	Resource	Main operations
client.products	Product	create, get, list, iterate, update, delete
client.product_modules	ProductModule	create, get, list, iterate, update, delete
client.licensees	Licensee	create, get, list, iterate, update, delete, validate, transfer
client.license_templates	LicenseTemplate	create, get, list, iterate, update, delete
client.licenses	License	create, get, list, iterate, update, delete
client.tokens	Token	create, get, list, iterate, delete, create_shop_token, create_api_key_token
client.transactions	Transaction	get, list, iterate
client.payment_methods	PaymentMethod	get, list, iterate
client.bundles	Bundle	create, get, list, iterate, update, delete, obtain
client.notifications	Notification	create, get, list, iterate, update, delete
client.utility	(reference data)	list_countries, list_license_types, list_licensing_models
client.validation	(shortcut)	validate

---

Products

from netlicensing import NetLicensingClient

client = NetLicensingClient()

# Create
product = client.products.create(
    number="P-MYAPP-1",
    name="My Application",
    version="2.0",
    active=True,
    description="A great application",
    licensee_auto_create=True,
)

# Read
product = client.products.get("P-MYAPP-1")
print(product.name, product.version)

# List (first page)
page = client.products.list({"active": True})
for p in page:
    print(p.number, p.name)

# Update
product = client.products.update("P-MYAPP-1", name="My Application v2", version="2.1")

# Delete (cascade removes all dependent resources)
client.products.delete("P-MYAPP-1", force_cascade=True)

---

Product Modules

from netlicensing import LicensingModel

module = client.product_modules.create(
    product_number="P-MYAPP-1",
    number="M-MAIN",
    name="Main Module",
    licensing_model=LicensingModel.SUBSCRIPTION,
    active=True,
)

module = client.product_modules.get("M-MAIN")
client.product_modules.update("M-MAIN", name="Main Module (updated)")
client.product_modules.delete("M-MAIN")

---

Licensees

# Create a customer
licensee = client.licensees.create(
    product_number="P-MYAPP-1",
    number="CUSTOMER-42",
    name="Acme Corp",
    active=True,
)

# Read
licensee = client.licensees.get("CUSTOMER-42")

# Update
client.licensees.update("CUSTOMER-42", name="Acme Corporation", active=True)

# Transfer all licenses to another licensee
client.licensees.transfer("CUSTOMER-42", source_licensee_number="CUSTOMER-OLD")

# Delete
client.licensees.delete("CUSTOMER-42")

---

Validation

Use client.validation.validate() (or client.licensees.validate()) to check whether a customer holds a valid license.

from netlicensing import ValidationParameters

# Simple call — keyword arguments
result = client.validation.validate(
    "CUSTOMER-42",
    product_number="P-MYAPP-1",
    product_module_parameters={
        "M-FLOATING": {"sessionId": "session-abc123", "action": "checkOut"},
    },
)

# Using a ValidationParameters model
params = ValidationParameters(
    product_number="P-MYAPP-1",
    product_module_parameters={
        "M-NODELOCKED": {"nodeSecret": "hardware-fingerprint"},
    },
)
result = client.validation.validate("CUSTOMER-42", params)

# Inspect the result
print(result.is_valid())          # True if all modules are valid
print(result.ttl)                  # TTL in seconds (for offline use)

module_result = result.by_product_module("M-MAIN")
if module_result:
    print(module_result.valid, module_result.licensing_model, module_result.warning_level)

---

License Templates

from netlicensing import LicenseType

# FEATURE template (perpetual, free)
template = client.license_templates.create(
    product_module_number="M-MAIN",
    number="LT-FEATURE",
    name="Feature License",
    license_type=LicenseType.FEATURE,
    price=0,
    active=True,
    automatic=True,   # auto-assign to new licensees
)

# TIMEVOLUME template (annual subscription, € 99)
template = client.license_templates.create(
    product_module_number="M-SUB",
    number="LT-ANNUAL",
    name="Annual Subscription",
    license_type=LicenseType.TIMEVOLUME,
    price=99.00,
    currency="EUR",
    timeVolume=365,
    timeVolumePeriod="DAY",
)

template = client.license_templates.get("LT-ANNUAL")
client.license_templates.update("LT-ANNUAL", price=79.00)
client.license_templates.delete("LT-ANNUAL")

---

Licenses

from datetime import date

# Assign a license to a customer
license_obj = client.licenses.create(
    licensee_number="CUSTOMER-42",
    license_template_number="LT-ANNUAL",
    active=True,
    startDate=date.today().isoformat(),
)

license_obj = client.licenses.get(license_obj.number)
client.licenses.update(license_obj.number, active=False)
client.licenses.delete(license_obj.number)

---

Tokens

NetLicensing Shop token

Generates a one-time checkout URL for the customer-facing NetLicensing Shop.

token = client.tokens.create_shop_token(
    "CUSTOMER-42",
    product_number="P-MYAPP-1",
    success_url="https://vendor.example/success",
    cancel_url="https://vendor.example/cancel",
    success_url_title="Back to the app",
    cancel_url_title="Cancel",
)

print(token.shop_url)   # redirect the customer here

API key token

from netlicensing import ApiKeyRole

token = client.tokens.create_api_key_token(
    api_key_role=ApiKeyRole.OPERATION,
)

print(token.number)   # use as the api_key for a scoped client

Token management

# List all active tokens
page = client.tokens.list()

# Revoke a token
client.tokens.delete("TOKEN-NUMBER")

---

Bundles

A bundle groups one or more license templates so they can be sold together.

# Create a bundle
bundle = client.bundles.create(
    number="B-STARTER",
    name="Starter Pack",
    license_template_numbers=["LT-FEATURE-A", "LT-FEATURE-B"],
    price=49.00,
    currency="EUR",
    active=True,
)

bundle = client.bundles.get("B-STARTER")
client.bundles.update("B-STARTER", name="Starter Pack (updated)")

# Obtain — creates licenses from all templates in the bundle for a customer
licenses_page = client.bundles.obtain("B-STARTER", licensee_number="CUSTOMER-42")

client.bundles.delete("B-STARTER")

---

Transactions

Transactions are created automatically by NetLicensing.

# List closed transactions
page = client.transactions.list({"status": "CLOSED"})
for txn in page:
    print(txn.number, txn.status, txn.grand_total, txn.currency)

# Retrieve a single transaction
txn = client.transactions.get("TX-12345")

---

Payment Methods

page = client.payment_methods.list({"active": True})
for pm in page:
    print(pm.number)

---

Notifications

from netlicensing import NotificationProtocol, NotificationEvent

notification = client.notifications.create(
    number="NOTIF-1",
    name="License Events Webhook",
    protocol=NotificationProtocol.WEBHOOK,
    endpoint="https://vendor.example/hooks/netlicensing",
    events=[NotificationEvent.LICENSE_CREATED, NotificationEvent.LICENSE_UPDATED],
    active=True,
)

client.notifications.update("NOTIF-1", name="License Events Webhook (updated)")
client.notifications.delete("NOTIF-1")

---

Utility

# Countries with VAT rates
page = client.utility.list_countries()
for country in page:
    print(country.code, country.name, country.vat_percent, country.is_eu)

# Supported license types and licensing models
print(client.utility.list_license_types())
print(client.utility.list_licensing_models())

---

Pagination and Iteration

All list() calls return a Page[T] object:

page = client.licensees.list({"active": True})

print(page.page_number)   # 0-based current page
print(page.total_pages)
print(page.total_items)
print(page.has_next)

for licensee in page:     # Page is iterable
    print(licensee.number)

print(len(page))          # number of items on this page
print(bool(page))         # False when the page is empty

Use iterate() to transparently walk all pages without manual pagination:

for licensee in client.licensees.iterate({"active": True}):
    print(licensee.number, licensee.name)

Control pagination explicitly:

page = client.licensees.list(pageNumber=0, itemsNumber=20)
while page.has_next:
    page = client.licensees.list(pageNumber=page.page_number + 1, itemsNumber=20)
    for item in page:
        print(item.number)

---

Error Handling

All exceptions inherit from NetLicensingError:

NetLicensingError
├── NetLicensingHTTPError       status_code, payload, method, url, request_id
│   └── NetLicensingAuthError   raised on HTTP 401 / 403
├── NetLicensingNetworkError    raised on connection or protocol errors
│   └── NetLicensingTimeoutError  raised when the request times out
└── NetLicensingValidationError raised when a response cannot be parsed

from netlicensing import (
    NetLicensingAuthError,
    NetLicensingHTTPError,
    NetLicensingNetworkError,
    NetLicensingTimeoutError,
    NetLicensingValidationError,
)

try:
    product = client.products.get("UNKNOWN")
except NetLicensingAuthError:
    print("Check your API key or permissions")
    raise
except NetLicensingHTTPError as exc:
    print(f"HTTP {exc.status_code}: {exc}")
    print(f"Request: {exc.method} {exc.url}")
    if exc.request_id:
        print(f"Request-ID: {exc.request_id}")
except NetLicensingTimeoutError:
    print("Request timed out — retry later")
except NetLicensingNetworkError:
    print("Network error")
except NetLicensingValidationError:
    print("Unexpected response format")

---

Context Manager

NetLicensingClient implements the context manager protocol. The underlying HTTP connection pool is released on exit.

with NetLicensingClient(api_key="YOUR_API_KEY") as client:
    result = client.validation.validate("CUSTOMER-42")
    print(result.is_valid())
# HTTP client is closed automatically

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Models and Enums

All public symbols are importable directly from netlicensing:

from netlicensing import (
    # Client
    NetLicensingClient,
    NetLicensingConfig,

    # Exceptions
    NetLicensingError,
    NetLicensingAuthError,
    NetLicensingHTTPError,
    NetLicensingNetworkError,
    NetLicensingTimeoutError,
    NetLicensingValidationError,

    # Entity models
    Bundle,
    Country,
    License,
    LicenseTemplate,
    Licensee,
    Notification,
    Page,
    PaymentMethod,
    Product,
    ProductDiscount,
    ProductModule,
    Token,
    Transaction,
    ValidationParameters,
    ValidationResult,

    # Enums
    ApiKeyRole,
    LicenseeSecretMode,
    LicenseType,
    LicensingModel,
    NotificationEvent,
    NotificationProtocol,
    TokenType,
    TransactionSource,
    TransactionStatus,
)

Key enums

Enum	Values
LicensingModel	TRY_AND_BUY, SUBSCRIPTION, RENTAL, FLOATING, MULTI_FEATURE, PAY_PER_USE, PRICING_TABLE, QUOTA, NODE_LOCKED, DISCOUNT
LicenseType	FEATURE, TIMEVOLUME, FLOATING, QUANTITY
TokenType	DEFAULT, SHOP, APIKEY, ACTION
ApiKeyRole	LICENSEE, ANALYTICS, OPERATION, MAINTENANCE, ADMIN
TransactionStatus	PENDING, CLOSED, CANCELLED
NotificationProtocol	EMAIL, WEBHOOK
NotificationEvent	TRANSACTION_STATUS_CHANGED, LICENSEE_CREATED, LICENSEE_UPDATED, LICENSE_CREATED, LICENSE_UPDATED

---

Custom Properties

NetLicensing supports arbitrary custom properties on most resources. Pass them as keyword arguments or include them in a model instance:

# As keyword arguments
licensee = client.licensees.create(
    product_number="P-MYAPP-1",
    number="CUSTOMER-99",
    name="Widget Corp",
    companyId="WIDGET-CORP",   # custom property
    tier="enterprise",         # custom property
)

# Via model (extra fields are preserved and round-tripped)
from netlicensing import Licensee

licensee = Licensee(number="CUSTOMER-99", name="Widget Corp", companyId="WIDGET-CORP")
result = client.licensees.update("CUSTOMER-99", licensee)

# Access custom properties
print(licensee.model_extra)   # {'companyId': 'WIDGET-CORP', 'tier': 'enterprise'}

---

Demo

A small command-line demo app is included in demo/.

# Validate a licensee
NETLICENSING_API_KEY=YOUR_KEY python demo/app.py validate CUSTOMER-42 \
    --product-number P-MYAPP-1 \
    --module M-MAIN \
    --node-secret "my-hardware-id"

# Generate a Shop checkout URL
NETLICENSING_API_KEY=YOUR_KEY python demo/app.py shop-token CUSTOMER-42 \
    --product-number P-MYAPP-1 \
    --success-url https://vendor.example/success \
    --cancel-url https://vendor.example/cancel

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Development

# Run the full test suite (no network access needed — uses httpx.MockTransport)
pytest

# Build distribution packages
python -m build

# Validate the built packages before uploading
twine check dist/*

# Type-check the library
mypy

The test suite does not call live NetLicensing servers. To run the demo-account smoke test when you have internet access:

NETLICENSING_LIVE_DEMO=1 pytest tests/test_live_demo.py -v

That test authenticates as demo:demo, creates a temporary APIKEY token for the demo vendor, uses it for a product-list call, and revokes the token.

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References

• NetLicensing RESTful API
• NetLicensing Security / API Key Identification
• NetLicensing Management Console
• NetLicensing Licensing Models

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How to Contribute

Everyone is welcome to contribute to this project! Once you're done with your changes, send a pull request and check CI Status. Thanks!

Bugs and Feedback

For bugs, questions, and discussions please use GitHub Issues.

License

This library is open-sourced software licensed under the Apache License Version 2.0.

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Visit Labs64 NetLicensing at https://netlicensing.io