Open Calais Blog


As part of the shutdown of our legacy API, there will be a planned shutdown of the service for 48 hours starting at 6:00 AM EST on September 7, 2015. During this time, if you are using the legacy service, you will be limited to zero requests. It is important that you upgrade to our […]

Introducing the New and Improved Tagaroo WordPress Plugin

Greetings! In addition to our new API, we introduce to you the new and improved Tagaroo WordPress plugin. Tagaroo integrates between your WordPress blog and the Calais web service. It fetches semantic data and suggests tags based on what you are writing. In addition to its own social tags, it also returns tags for companies […]

Legacy API Discontinued AUGUST 31; PLEASE UPGRADE!

Hi there, This is just another one of our weekly pleas for you to please upgrade to the new Open Calais API. Please make sure you visit our Upgrade section to discover the steps necessary to upgrade your workflow to adhere to the new API. Thank you! Team Calais

We're Getting Down to the Wire; Please Upgrade!

On August 31, 2015, we will be retiring the legacy Calais and will have a new API. Please upgrade as soon as possible! We have everything you need to upgrade on our Upgrade page. And, of course, we’re always here to answer your questions at

Legacy ID to PermID Mapping

Please see below for a collection of links to zip files containing mappings of legacy IDs to PermID URIs, in order to sync your implementation with PermID.

Our Weekly Plea: PLEASE UPGRADE!

We just wanted to take another opportunity to remind you to upgrade to the new API, in case you haven’t yet. All the details around upgrading can be found here. Upgrading has many advantages, such as access to enhanced metadata and enhanced through-put capabilities. Remember to upgrade BEFORE AUGUST 31, 2015 as the legacy service […]

Bringing order to information overload, intelligently

Our own Ofer Harari takes the time to sit down with Thomson Reuters’ Inside Finance & Risk and answer some of their questions on big data and offers solutions on how Thomson Reuters Intelligent Tagging can scale your business’s work with big data. The full article can be found here.

Sample Codes Available!

For your convenience, we offer the below link to code samples in Java, .NET, PHP, Python, and Javascript! Enjoy!