Mock sample for your project: Zalando Shop API

The Negotiations API gives sellers the ability to proactively send discount offers to buyers who have shown an "interest" in their listings. By sending buyers discount offers on listings where they have shown an interest, sellers can increase the velocity of their sales. There are various ways for a buyer to show interest in a listing. For example, if a buyer adds the listing to their Watch list, or if they add the listing to their shopping cart and later abandon the cart, they are deemed to have shown an interest in the listing. In the offers that sellers send, they can discount their listings by either a percentage off the listing price, or they can set a new discounted price that is lower than the original listing price. For details about how seller offers work, see Sending offers to buyers.

カラーミーショップアプリストア API
アプリストアにて公開するアプリに対して、一般公開しているカラーミーショップAPIに加えて、カラーミーショップアプリストアAPI（以下、アプリストアAPIといいます）を利用することが出来ます。アプリストアAPIでは以下のことが行えます。
課金データ(アプリ内課金、従量課金)の作成
インラインスクリプトタグの取得・作成・更新・削除
スクリプトタグの取得・作成・更新・削除
利用手順
アプリストアAPIを利用するには、OAuth認証が必要です。OAuth認証の基本的な流れについてはカラーミーショップAPIドキュメントを参照してください。
アプリストアAPIの利用のために、以下のscopeが追加で指定可能になります。カラーミーショップAPIドキュメントに掲載されているscopeと合わせてご利用ください。
|スコープ|機能|
|---|---|
|writeapplicationcharge|課金データの作成|
|readshopscript_tags|ショップページのスクリプトタグを参照|
|writeshopscript_tags|ショップページへスクリプトタグを追加・更新|
|readinlinescript_tags|インラインスクリプトタグを参照|
|writeinlinescript_tags|インラインスクリプトタグを追加・更新|
|readscripttags|スクリプトタグを参照(deprecated)|
|writescripttags|スクリプトタグを追加・更新(deprecated)|
(例) カラーミーショップアカウントの認証ページを表示

Just Eat API
Just Eat offers services for our various business partners and our consumer applications.
How you interact with the API depends on the services you wish to interact with.
Security
HTTPS
All api calls and callbacks require HTTPS. Your service will need a valid SSL certificate and be accessible via the standard SSL port (port 443).
Making an API request
Some API calls require an API key, to authenticate the partner calling the API.

The Metadata API has operations that retrieve configuration details pertaining to the different eBay marketplaces. In addition to marketplace information, the API also has operations that get information that helps sellers list items on eBay.

Import your orders, retrieve your orders and generate labels.

The Account API gives sellers the ability to configure their eBay seller accounts, including the seller's policies (the Fulfillment Policy, Payment Policy, and Return Policy), opt in and out of eBay seller programs, configure sales tax tables, and get account information. For details on the availability of the methods in this API, see Account API requirements and restrictions.

The price is a fundamental building block for your listing on Walmart.com. You can use the price management APIs to set up and manage the price for a given item

reverb

The Feed API lets sellers upload input files, download reports and files including their status, filter reports using URI parameters, and retrieve customer service metrics task details.

The shop API empowers developers to build amazing new apps or websites using Zalando shop data and services.