Mock sample for your project: Swagger API2Cart

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 Analytics API provides data and information about a seller and their eBay business. The resources and methods in this API let sellers review information on their listing performance, metrics on their customer service performance, and details on their eBay seller performance rating. The three resources in the Analytics API provide the following data and information: Customer Service Metric – Returns data on a seller's customer service performance as compared to other seller's in the same peer group. Traffic Report – Returns data that shows how buyers are engaging with a seller's listings. Seller Standards Profile – Returns data pertaining to a seller's performance rating. Sellers can use the data and information returned by the various Analytics API methods to determine where they can make improvements to increase sales and how they might improve their seller status as viewed by eBay buyers. For details on using this API, see Analyzing seller performance.

Note: This is a (Limited Release) API available only to select developers approved by business units. Enables a seller adding an ad or item on a Partner's site to automatically create an eBay listing draft using the item details from the Partner's site.

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.

This is the koomalooma Partner API. koomalooma is the first Loyalty BPaaS (Business Process as a Service) for mobile and web companies. With koomalooma merchants issue points for actions their customers / users make on your mobile or web store, for example a purchase or a referral. koomalooma takes care of all the rest, from signing up users, keeping track of points and delivering rewards in over 80 countries. koomalooma offers an easy to integrate API and web backend to configure loyalty campaigns and track performance. You can find more at http://support.koomalooma.com

One API serving data spanned across multiple verticals

Note: This is a (Limited Release) API available only to select developers approved by business units. The Feed API provides the ability to download TSV_GZIP feed files containing eBay items and an hourly snapshot file of the items that have changed within an hour for a specific category, date and marketplace. In addition to the API, there is an open source Feed SDK written in Java that downloads, combines files into a single file when needed, and unzips the entire feed file. It also lets you specify field filters to curate the items in the file.

reverb

Online payment fraud detection service. It helps merchants to minimize chargebacks and therefore maximize the revenue. It can be used to detect fraud for various kinds of payment method, such as credit card, paypal, cod and so on. Please visit https://www.fraudlabspro.com to learn more.

Magento Commerce is the leading provider of open omnichannel innovation.

The DocuSign REST API provides you with a powerful, convenient, and simple Web services API for interacting with DocuSign.

https://www.beanstream.com/api/v1