Skip to page content.
Collaborate. Build. Share.
The Developer Network helps you learn, experiment and collaborate to put OCLC Web services to work.

WMS users, try this new app for printing custom labels

Hear communication tips for successful software projects
See the Advanced TypeAhead project from Developer House

Learn about homegrown reclamation using Metadata API
Recent news
APIs are the first built using new strategy and infrastructure
Karen Coombs
22 March 2021
New versions of the WorldCat Search and Metadata APIs were the first developed using OCLC's new API strategy and cloud-based infrastructure.
WMS Acquisitions API release, 26 March 2021
Karen Coombs
05 March 2021
The next release of the WMS Acquisitions API is scheduled for 26 March 2021. 
Call for proposals: DevConnect 2021
Karen Coombs
24 February 2021
OCLC invites you to contribute your insights and projects to DevConnect 2021.
Planned maintenance: Classify User Interface, 25 February
Karen Coombs
17 February 2021
OCLC will be performing maintenance on the Classify User Interface on 25 February 2021 at 9:00am Eastern US (UTC -5). 
Search API 2.0 ‘heldinState’ parameter change
Karen Coombs
10 February 2021
On 12 February 2021 we are installing a new version of WorldCat Search API 2.0 so the ‘heldinState’ parameter aligns with ISO standards and better supports global holdings.
More news »
Follow the Developer Network
Upcoming events
Watch this space for more Developer Network events.
More events »
Browse Web services »
Read our Web service documentation
Try the API Explorer »
Interact with our APIs
Manage your API keys »

OCLC Headquarters
6565 Kilgour Place
Dublin, Ohio 43017-3395 US
800-848-5878 (USA / Canada only)
Find Information for
Visit Related Sites
OCLC Research
Support & Training
OCLC System Alerts
Contact the Developer Network
Browse the API Explorer
Request a web service key
Subscribe to WC-DEVNET-L
Get started
Follow the OCLC Developer Network:
© 2019 OCLC
Domestic and international trademarks and/or service marks of OCLC, Inc. and its affiliates
This site uses cookies. By continuing to browse the site, you are agreeing to our use of cookies. Find out more about OCLC's cookie notice.
Privacy statement
Accessibility statement
ISO 27001 Certificate
Cookies on OCLC websites
Our web pages use cookies—information about how you interact with the site. When you select “Accept all cookies,” you’re agreeing to let your browser store that data on your device so that we can provide you with a better, more relevant experience.

Selecting “Reject unnecessary cookies” limits the data that’s stored to what’s strictly necessary for using the site. However, that may negatively impact your experience. You can also customize your cookie settings.

See our Cookie Notice for more information