Polar
Polar is an open-source, developer-first monetization platform that acts as a Merchant of Record (MoR), handling billing, payments, and global sales tax so software teams can sell digital products, subscriptions, usage-based billing, and license keys. The Polar API (https://api.polar.sh/v1) exposes products, prices, checkouts, customers, subscriptions, orders, benefits, license keys, a customer portal, usage meters/events, and webhooks behind Bearer organization access tokens. Not affiliated with Polar Electro (fitness wearables) or the Polaris design system.
Polar publishes 11 APIs on the APIs.io network, including benefits API, checkouts API, customer_portal API, and 8 more. Tagged areas include Billing, Payments, Merchant of Record, Monetization, and Subscriptions.
Polar’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.
Kin Score
APIs 11
Individual APIs this provider publishes, each with its own machine-readable definition.
Polar benefits API
Benefits (entitlements) attached to products.
Polar checkouts API
Hosted checkout sessions and reusable checkout links.
Polar customer_portal API
Customer-facing portal endpoints (Customer Session token).
Polar customers API
Customers, external IDs, and aggregated customer state.
Polar events API
Usage event ingestion for metered billing.
Polar license_keys API
License key issuance, validation, and activation.
Polar meters API
Usage meters aggregating ingested events.
Polar orders API
Orders, invoices, and receipts.
Polar products API
Product catalog and embedded pricing.
Polar subscriptions API
Recurring subscriptions.
Polar webhooks API
Webhook endpoint management and deliveries.
Scroll for all 11
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Polar API
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Polar Sh Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Polar Sh Finops
FINOPSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API