API reference

The API reference documentation is divided into three parts:

• The Agent API - All functions and properties on the Agent object. An instance of the Agent object is acquired by calling the init method the agent either via script element on the page or require the elastic-apm-rum module in Node.js. The Agent instance is usually referred to by the variable apm in this documentation.
• The Transaction API - All functions and properties on the Transaction object. An instance of the Transaction object is acquired by calling apm.startTransaction().
• The Span API - All functions and properties on the Span object. An instance of the Span object is acquired by calling apm.startSpan().