How can I get a list of external links for a Work Item using the Azure DevOps API?

Question

I have a GitHub repo whose development is managed on Azure DevOps, linked using Azure Boards. In the 'Development' field of each Work Item (e.g. User Story, Task) is a list of linked GitHub commmits for that item. I would like to use the Azure DevOps API to retrieve this list for each work item.

What I've tried:

• This list doesn't seem to correspond to a field in the list of Work Item fields (from the https://dev.azure.com/{organization}/{project}/_apis/wit/fields endpoint). The number of GitHub links seems to match the System.ExternalLinkCount, but I can't find a way to then list these links.
• Using the WIQL for WorkItemLinks (documentation here), but this looks like it's only for links between work items, not e.g. links from work items to other external resources
• The general documentation covers GitHub links, but not in terms of the API.

Answer 1

Please use $expand=relations parameter to get details of linked items.

There is difference between API in v5.1 and v6.0 where on the second flog is included by default.