DataWeave 2.1 is compatible with Mule 4.1. Standard Support for Mule 4.1 ended on November 2, 2020, and this version of Mule will reach its End of Life on November 2, 2022, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

readUrl(String, String, Object)

Similar to the read function. However, readURL accepts a URL as input. Otherwise, it accepts the same arguments as read.


Name Description


The URL string to read.


A supported format (or content type). Default: application/dw.


Optional: Sets reader configuration properties. For other formats and reader configuration properties, see DataWeave Output Formats and Writer Properties.


This example reads JSON object from a URL. (For readability, the output values shown below are shortened (…​).)


%dw 2.0
output application/json
readUrl("https://jsonplaceholder.typicode.com/posts/1", "application/json")


  "userId": 1,
  "id": 1,
  "title": "sunt aut facere ...",
  "body": "quia et suscipit\nsuscipit ..."

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