License-API

Overview

License-API is a cloud-based service designed to assist software developers and businesses in managing product licenses and entitlements. The API provides endpoints for generating, validating, and revoking software licenses, supporting various business models such as perpetual licenses, time-limited subscriptions, and usage-based billing. It aims to streamline the process of integrating licensing functionality into software applications, reducing the development overhead associated with building custom licensing systems.

The service addresses challenges related to software piracy and unauthorized usage by offering mechanisms for secure product activation and entitlement enforcement. Developers can integrate License-API to control access to software features, manage trial periods, and ensure compliance with licensing agreements. It is suitable for independent software vendors (ISVs), SaaS companies, and other businesses that distribute software and require a robust system for license management.

Key use cases for License-API include automating the issuance of license keys upon purchase, verifying license validity during application startup, and tracking license usage for billing purposes. The API's design focuses on developer experience, offering clear documentation and SDKs for multiple programming languages. This approach is intended to facilitate straightforward integration into existing development workflows and application architectures. For example, a common implementation involves using the API to generate unique license keys that are then provided to end-users. When an end-user activates the software, the application calls License-API to validate the key and confirm entitlement before granting full access to features. This process helps ensure that only authorized users can access the software, aligning with established practices for digital rights management.

The platform also supports advanced features such as license revocation, which allows businesses to deactivate licenses in cases of fraud, refunds, or subscription cancellations. This capability is critical for maintaining control over distributed software and adapting to changes in customer relationships. Furthermore, License-API can track specific license parameters, such as the number of allowed installations or feature sets, enabling granular control over product offerings. This level of control is comparable to other license management solutions like Keygen's API documentation, which also emphasizes flexible entitlement models. The API is designed to be RESTful, making it accessible from various client applications and server-side environments.

Key features

• License Key Generation: Create unique, cryptographically secure license keys for software products.
• License Validation: Verify the authenticity and status of license keys in real-time, checking for expiration, revocation, or usage limits.
• Product Activation: Manage the association of a license key with a specific device or installation, often involving a one-time activation process.
• License Revocation: Deactivate active licenses remotely, useful for managing refunds, subscription cancellations, or security incidents.
• Subscription Management: Support for recurring licenses, enabling control over subscription periods and automatic expiration.
• Usage-Based Licensing: Track specific metrics (e.g., number of users, API calls, data processed) to implement usage-based billing models.
• Entitlement Management: Define and enforce what features or modules a user is entitled to based on their license.
• Webhooks: Receive real-time notifications about license events, such as activation, deactivation, or expiration, to trigger downstream actions in other systems.
• Developer SDKs: Libraries available for Python, Node.js, PHP, Ruby, Go, C#, and Java to simplify API integration (License-API SDKs).
• Compliance: Adherence to GDPR standards for data protection and privacy.

Pricing

License-API offers a free developer plan and several paid tiers, structured around the number of licenses managed and API requests. Pricing is subject to change; refer to the official License-API pricing page for the most current information (as of 2026-05-28).

Common integrations

• E-commerce Platforms: Integrate with platforms like Shopify, WooCommerce, or custom storefronts to automatically issue licenses upon purchase.
• Payment Gateways: Connect with Stripe or PayPal to trigger license activation or deactivation based on payment status or subscription events (Stripe API documentation).
• CRM Systems: Sync license data with Salesforce or HubSpot to provide sales and support teams with relevant customer entitlement information.
• SaaS Billing Systems: Integrate with billing platforms to manage subscriptions, trials, and usage-based pricing models.
• Application Backends: Embed license validation logic directly into server-side applications developed with Node.js, Python, Java, or other languages.
• CI/CD Pipelines: Automate the creation and distribution of development licenses during the software build and deployment process.

Alternatives

• Keygen: A licensing API and entitlement management platform for software products, focusing on robust security and flexible licensing models.
• Paddle: A complete platform for software businesses, offering license management alongside payment processing, subscriptions, and global tax compliance.
• FastSpring: An all-in-one e-commerce platform for software and SaaS, including subscription management, global payments, and integrated licensing capabilities.

Getting started

To begin using License-API, you typically sign up for an account, obtain an API key, and then use one of the provided SDKs or make direct HTTP requests to the API endpoints. The following Python example demonstrates how to create a new license key and then validate it. This example assumes you have replaced YOUR_API_KEY with your actual API key and YOUR_PRODUCT_ID with the ID of your product.

import requests

API_BASE_URL = "https://api.license-api.com/v1"
API_KEY = "YOUR_API_KEY"
PRODUCT_ID = "YOUR_PRODUCT_ID"

headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

def create_license(product_id, customer_email):
    payload = {
        "product_id": product_id,
        "customer_email": customer_email,
        "type": "perpetual", # or "subscription", "trial"
        "metadata": {"order_id": "12345"}
    }
    response = requests.post(f"{API_BASE_URL}/licenses", headers=headers, json=payload)
    response.raise_for_status()
    return response.json()

def validate_license(license_key):
    payload = {
        "license_key": license_key,
        "product_id": PRODUCT_ID # Optional, but good for verification
    }
    response = requests.post(f"{API_BASE_URL}/licenses/validate", headers=headers, json=payload)
    response.raise_for_status()
    return response.json()

if __name__ == "__main__":
    # 1. Create a new license
    try:
        new_license_data = create_license(PRODUCT_ID, "[email protected]")
        license_key = new_license_data["data"]["key"]
        print(f"Successfully created license: {license_key}")
        print(f"License details: {new_license_data}")

        # 2. Validate the created license
        validation_result = validate_license(license_key)
        print(f"Validation result for {license_key}: {validation_result}")

    except requests.exceptions.HTTPError as e:
        print(f"API Error: {e.response.status_code} - {e.response.text}")
    except Exception as e:
        print(f"An error occurred: {e}")

This Python script first defines functions to interact with the License-API for creating and validating licenses. The create_license function sends a POST request to the /licenses endpoint with details like product ID and customer email to generate a new key. The validate_license function then uses the generated key to check its status against the /licenses/validate endpoint. Error handling is included to catch potential API errors. For more detailed examples and specific endpoint usage, refer to the License-API API reference and SDK documentation.