Building Compelling Applications Using eBay API Platform

BUILDING COMPELLING APPLICATIONS USING eBay API PLATFORM Rekha Patel, Staff Developer Technical Support Engineer

AGENDA
API Products
Making an API Call with APPID: Demo
Making an API Call with User Token: Demo

THE POSSIBILITIES Widgets Gadgets Plug ins Mobile Applications Toolbars and more ….

API FUNCTIONALITY
APIs give you most of the functionality available on the eBay website:
List items and manage inventory
Find items and purchase them
Integrate with fulfillment systems
Manage communications
Manage user accounts
API request format:
XML
SOAP
Name-Value Pair (NVP)
JavaScript Object Notation (JSON)

API PRODUCTS
Product overview: http://developer.ebay.com/products/overview/Default.aspx
API by feature: http://developer.ebay.com/products/overview/api-by-feature/

GETTING STARTED
Step 1:
Join the developer program:
https://developer.ebay.com/join/Default.aspx
Step 2: Get your keyset:
https://developer.ebay.com/DevZone/account/
Sandbox is different from Production. Keyset cannot used interchangeably.

AUTHENTICATION FOR APIs
APIs that need just the AppID
Finding
Shopping
Merchandising
Price research
Advanced research
Client alerts (public alerts)
APIs that need user token
Trading and platform notifications
Large merchant services
Feedback
Best match
Client alerts (user alerts)
Selling Manager Apps

AGENDA
API Products

MAKING AN API CALL WITH APPID: DEMO
Writing a simple search application using the Finding API
Components for constructing the request:
Component Values Server URL http://svcs.ebay.com/services/search/FindingService/v1 Required parameters SERVICE-VERSION=1.0.0 SECURITY-APPNAME=eBayAPID-73f4-45f2-b9a3-c8f6388b38d8 OPERATION-NAME=findItemsByKeywords keywords=harry%20potter%20phoenix Defaults GLOBAL-ID=EBAY-US REQUEST-DATA-FORMAT=NV RESPONSE-DATA-FORMAT=XML Filters itemFilter.name=MaxPrice itemFilter.value=10.00 itemFilter.paramName=Currency itemFilter.paramValue=USD buyerPostalCode=95125 itemFilter.name=MaxDistance itemFilter.value=25 paginationInput.pageNumber=1 paginationInput.entriesPerPage=3 Output parameters outputSelector=SellerInfo

OBSERVATIONS FROM THE DEMO
Information returned in the response can vary by eBay site.
The request version is honored but the response version is always the latest.
DateTime values are always in GMT.
You can control the amount of information returned using pagination, filters, and output selector.

AGENDA
API Products

MAKING A TRADING API CALL WITH USER TOKEN: DEMO
Create a user:
Production – www.ebay.com
Sandbox – Sandbox User Registration Tool http://developer.ebay.com/DevZone/sandboxuser/
Generate a user token:
http://developer.ebay.com/DevZone/account/tokens/
Use the API test tool:
https://developer.ebay.com/DevZone/build-test/test-tool/
Select the environment
Keyset
API
Site
Use call template or insert your request
Submit request

DESIGN CONSIDERATIONS
Use the API with the least authentication.
Use the Sandbox to test if you “write” data.
Implement retries for eBay server and network errors.
Implement best practices in the documentation and knowledge base.
Ask for only as much data as you need.
Implement logging, especially for selling applications.
User tokens expire every 18 months. Renew them before expiration.
Plan to update your application at least once in 6 months.

CONCLUDING THOUGHTS
Estimate your call limit (usually 5,000) and see if you need more than the defaults:
http://developer.ebay.com/products/overview/call-limits
File a compatible application check to increase call limit:
http://developer.ebay.com/support/certification
Use API call use report to monitor Trading API call usage:
https://developer.ebay.com/DevZone/account/dashboard/

MORE INFORMATION
Documentation
http://developer.ebay.com/support/docs
Developer tool
http://developer.ebay.com/support/tools/
Code samples
http://developer.ebay.com/community/codebase/
Knowledge base
http://developer.ebay.com/DevZone/support/knowledgebase/
System announcements
http://developer.ebay.com/support/system-announcements/
Forums
http://developer.ebay.com/community/forums/
Developer support
http://developer.ebay.com/support/developersupport/

LEARN AND SHARE
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Innovate 09 hashtag: #ppxi09
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Building Compelling Applications Using eBay API Platform

by PayPalX Developer Network on Nov 10, 2009

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