# Firmly API

## Docs

- [Add Addon](https://developers.firmly.ai/api-reference/addon-management/add-addon.md): Applies addon services to your cart
- [Overview](https://developers.firmly.ai/api-reference/addon-management/overview.md): Flexible addon system for value-added services
- [Remove Addon](https://developers.firmly.ai/api-reference/addon-management/remove-addon.md): Removes addon services from your cart by addon identifier
- [Browser Session](https://developers.firmly.ai/api-reference/authentication/browser-session.md): Generates an access token for Cart API authentication
- [Server-to-Server Authentication](https://developers.firmly.ai/api-reference/authentication/server-to-server.md): Authenticate backend services to make API requests on behalf of devices
- [Add Line Item](https://developers.firmly.ai/api-reference/cart-management/add-line-item.md): Adds a product variant to the cart with automatic shipment grouping based on fulfillment requirements
- [Clear Cart](https://developers.firmly.ai/api-reference/cart-management/clear-cart.md): Removes all line items from the cart, returning an empty cart
- [Get Cart](https://developers.firmly.ai/api-reference/cart-management/get-cart.md): Retrieves the current state of a shopping cart with all line items, shipments, pricing, and addon information
- [Overview](https://developers.firmly.ai/api-reference/cart-management/overview.md): Endpoints for managing shopping carts
- [Update Line Item](https://developers.firmly.ai/api-reference/cart-management/update-line-item.md): Updates the quantity of an existing line item in the shopping cart
- [Get All Products](https://developers.firmly.ai/api-reference/catalog/get-all-products.md): Returns all products from a merchant's catalog
- [Get a Product](https://developers.firmly.ai/api-reference/catalog/get-product.md): Retrieves detailed information about a specific product
- [Get Product from URL](https://developers.firmly.ai/api-reference/catalog/get-product-from-url.md): Extracts product information from a merchant's product page URL
- [Catalog API Overview](https://developers.firmly.ai/api-reference/catalog/overview.md): Browse and retrieve product information from merchant stores
- [Get Consents](https://developers.firmly.ai/api-reference/checkout/get-consents.md): Retrieves consent settings for the current cart session
- [Overview](https://developers.firmly.ai/api-reference/checkout/overview.md): Complete the checkout process
- [Set Billing Info](https://developers.firmly.ai/api-reference/checkout/set-billing-info.md): Sets customer billing information for payment processing
- [Set Consents](https://developers.firmly.ai/api-reference/checkout/set-consents.md): Updates consent preferences for the current cart session
- [Set Shipping Info](https://developers.firmly.ai/api-reference/checkout/set-shipping-info.md): Sets customer shipping information and calculate shipping costs
- [Discovery API Overview](https://developers.firmly.ai/api-reference/discovery/overview.md): Find and discover products across merchant catalogs
- [Search Products](https://developers.firmly.ai/api-reference/discovery/search.md): Search for products across merchant catalogs using keyword-based queries with optional filters
- [Get Order Status](https://developers.firmly.ai/api-reference/orders/get-order-status.md): Retrieves real-time order status including tracking, fulfillments, returns, and refunds from the merchant platform
- [API Reference](https://developers.firmly.ai/api-reference/overview.md): Complete reference documentation for Firmly APIs
- [Complete Order](https://developers.firmly.ai/api-reference/payment/complete-order-v1.md): Completes checkout and places an order with encrypted payment information
- [Complete Order](https://developers.firmly.ai/api-reference/payment/complete-order-v2.md): Completes checkout for Full Cart API with advanced features
- [Authorize Klarna Checkout](https://developers.firmly.ai/api-reference/payment/express-checkout/authorize-klarna.md): Confirms the Klarna authorization token after customer approval in the Klarna widget
- [Complete Klarna Order](https://developers.firmly.ai/api-reference/payment/express-checkout/complete-order-klarna.md): Finalizes the order using the Klarna authorization token
- [Start Klarna Checkout](https://developers.firmly.ai/api-reference/payment/express-checkout/start-klarna.md): Creates a Klarna payment session and returns client credentials for the Klarna widget
- [Get Public Key](https://developers.firmly.ai/api-reference/payment/get-public-key.md): Retrieves the public key for encrypting credit card information
- [Place Order](https://developers.firmly.ai/api-reference/payment/place-order-v1.md): Creates a cart and places an order in a single operation
- [Place Order](https://developers.firmly.ai/api-reference/payment/place-order-v2.md): Creates a cart and place an order with Full Cart API features
- [Add Promo Codes](https://developers.firmly.ai/api-reference/promotions/add-promo-codes.md): Applies promotional codes to the cart for discounts
- [Clear Promo Codes](https://developers.firmly.ai/api-reference/promotions/clear-promo-codes.md): Removes all promotional codes from the cart
- [Overview](https://developers.firmly.ai/api-reference/promotions/overview.md): Apply and manage promotional codes
- [Get Active Carts](https://developers.firmly.ai/api-reference/session/get-active-carts.md): Retrieves all active cart sessions across multiple merchant domains
- [Get Active Domains](https://developers.firmly.ai/api-reference/session/get-active-domains.md): Retrieves all domains with active cart sessions
- [Get Postal Code](https://developers.firmly.ai/api-reference/session/get-postal-code.md): Retrieves the postal code preference for the current session
- [Overview](https://developers.firmly.ai/api-reference/session/overview.md): Session management endpoints for multi-domain cart tracking and postal code preferences
- [Session Transfer](https://developers.firmly.ai/api-reference/session/session-transfer.md): Transfers an external merchant session to Firmly's cart system
- [Set Postal Code](https://developers.firmly.ai/api-reference/session/set-postal-code.md): Updates the postal code preference for the current session
- [Get Availability](https://developers.firmly.ai/api-reference/shipment-configuration/get-availability.md): Retrieves available delivery dates and time slots for scheduled delivery shipments
- [Overview](https://developers.firmly.ai/api-reference/shipment-configuration/overview.md): Configure shipment fulfillment and delivery options
- [Set Fulfillment Type](https://developers.firmly.ai/api-reference/shipment-configuration/set-fulfillment-type.md): Changes the fulfillment method for a specific shipment to one of the available options
- [Set Shipping Method](https://developers.firmly.ai/api-reference/shipment-configuration/set-shipping-method.md): Selects a shipping method for a specific shipment and recalculates cart totals
- [Add Item to Cart](https://developers.firmly.ai/api-reference/simple-cart-api/cart/add-item.md): Adds a product to the shopping cart
- [Clear Cart](https://developers.firmly.ai/api-reference/simple-cart-api/cart/clear-cart.md): Removes all items from the shopping cart
- [Get Cart](https://developers.firmly.ai/api-reference/simple-cart-api/cart/get-cart.md): Retrieves the current shopping cart
- [Update Item Quantity](https://developers.firmly.ai/api-reference/simple-cart-api/cart/update-item.md): Updates the quantity of an item in the cart
- [Set Shipping Info](https://developers.firmly.ai/api-reference/simple-cart-api/checkout/set-shipping-info.md): Sets the shipping address and gets available shipping methods
- [Set Shipping Method](https://developers.firmly.ai/api-reference/simple-cart-api/checkout/set-shipping-method.md): Sets the shipping method for the order
- [Cart Lifecycle](https://developers.firmly.ai/concepts/cart-lifecycle.md): Understanding cart states and transitions in the Firmly API
- [How Firmly Works](https://developers.firmly.ai/concepts/how-firmly-works.md): Understand the core architecture and flow of the Firmly Cart API
- [Multi-Shipment Structure](https://developers.firmly.ai/concepts/multi-shipment.md): Understanding shipments in the Full Cart API
- [Choosing Your API](https://developers.firmly.ai/guides/choosing-your-api.md): Simple Cart API vs Full Cart API - Making the right choice
- [Full Cart API Implementation](https://developers.firmly.ai/guides/full-cart-api-guide.md): The complete checkout flow for complex fulfillment scenarios.
- [1-Step Checkout](https://developers.firmly.ai/guides/one-step-checkout.md): Implement frictionless checkout in minutes with Firmly's place-order API
- [Simple Cart API Implementation](https://developers.firmly.ai/guides/simple-cart-api-guide.md): Complete guide for standard e-commerce checkout
- [Firmly API](https://developers.firmly.ai/introduction.md): Enable commerce at the point of inspiration
- [Error Codes](https://developers.firmly.ai/resources/error-codes.md): Understanding API error codes and responses

## OpenAPI Specs

- [openapi](https://developers.firmly.ai/openapi.json)