Polar.sh

Manages recurring subscription products with configurable billing cycles (daily, weekly, monthly, yearly, custom intervals) and automatic charge collection. Implements subscription state management with trial period support, renewal scheduling, and customer lifecycle tracking. Integrates with payment processing to handle recurring transactions without requiring manual intervention per billing cycle.

Implements pay-as-you-go pricing models where charges are calculated based on tracked usage metrics (API calls, storage, compute units, etc.). Polar meters customer usage and aggregates consumption data to generate invoices at billing cycle end. Supports custom pricing tiers and seat-based pricing alongside usage metrics for hybrid billing models.

Sends real-time webhook notifications for key events in the transaction and subscription lifecycle including order creation, payment success/failure, subscription renewal, cancellation, and refund processing. Implements webhook delivery with retry logic and signature verification for security. Allows developers to trigger custom workflows based on these events.

Supports pricing and payment collection in multiple currencies (USD, EUR, GBP, CAD, AUD, JPY, CHF, SEK, INR, BRL) with automatic currency conversion and localized checkout experiences. Displays prices in customer's local currency based on location or preference. Handles currency exchange and settlement in merchant's preferred currency.

Allows creation and management of discount codes and coupons that customers can apply at checkout to reduce purchase price. Supports percentage-based and fixed-amount discounts with optional constraints (minimum purchase amount, expiration date, usage limits). Integrates discounts into checkout flow with real-time validation and price recalculation.

Provides analytics dashboard showing key metrics including revenue, customer count, subscription churn, refund rates, and product performance. Generates reports on sales trends, customer acquisition, and lifetime value. Integrates transaction data to calculate metrics without requiring external analytics tools.

Implements OAuth 2.0 authentication for secure API access and third-party integrations. Allows developers to request specific scopes for API operations (e.g., read products, create orders, manage customers). Generates access tokens with configurable expiration and refresh token support for long-lived integrations.

Automatically delivers downloadable files (PDFs, source code, templates, etc.) to customers upon successful purchase. Files are hosted by Polar and delivered via secure download links. Supports multiple file formats and sizes with configurable access duration and download limits.

Supports non-recurring transaction models including fixed-price one-time purchases and customer-determined pay-what-you-want (PWYW) pricing. Handles single-transaction checkout flows with optional minimum price enforcement for PWYW products. Integrates with Polar's payment processing to collect funds and deliver benefits immediately upon successful payment.

Generates unique license keys upon successful purchase and automatically delivers them to customers via email or customer portal. Implements key generation with configurable formats and validation logic. Integrates with order completion workflow to trigger key generation synchronously, ensuring customers receive keys immediately after payment confirmation.

Automatically grants customers access to private GitHub repositories upon successful purchase by adding them as collaborators or organization members. Integrates with GitHub OAuth and API to manage repository permissions programmatically. Supports both individual repository access and organization-wide access grants based on product configuration.

Automatically assigns Discord roles to customers upon successful purchase by connecting to a Discord server and updating user roles via Discord API. Integrates with Discord OAuth to identify the customer's Discord account and applies configured roles synchronously after payment confirmation.

Generates shareable checkout links for products that can be embedded in websites, shared via email, or posted on social media without requiring code integration. Links are unique per product and handle the entire payment flow, customer data collection, and benefit delivery. Supports customization of checkout appearance and optional customer information pre-population.

Provides embeddable checkout component that integrates directly into websites, allowing customers to purchase without leaving the site. Supports iframe embedding and potentially native web component integration. Handles payment collection, customer data validation, and benefit delivery within the embedded context while maintaining PCI compliance.

Polar acts as Merchant of Record, automatically calculating and remitting sales tax, VAT, and GST across supported jurisdictions. Integrates tax calculation into the checkout flow, displaying tax amounts to customers before payment. Handles tax registration, filing, and remittance on behalf of merchants, eliminating the need for separate tax compliance infrastructure.

Provides self-service customer portal where buyers can view subscription status, manage billing information, download invoices, request refunds, and access purchased benefits. Portal is automatically generated per customer with secure authentication. Integrates with subscription and order data to display real-time account information.