Rest API - Metadata for Jira 4.0 and 4.1
You can create/read/update/delete metadata value via UI or the following Rest API
Version 1.0
APIs
Base path for the Rest API: Jira_Base_Url/rest/metadata/1.0
e.g. get all metadata for project JM (as project-admin): https://jira.atlassian.internal/rest/metadata/1.0/project/JM?includeHidden=true
/component/{projectkey}/{identifier}
GET
get all metadata for a given object (e.g. version/component) as object array
PUT
create / update metadata as object array
/component/{projectkey}/{identifier}/{key}
GET
get the specified metadata
PUT
create / update one metadata
DELETE
delete the specified metadata
/component/{projectkey}/{identifier}/{key}/value
GET
get the specified metadata value
/group/{identifier}
GET
get all metadata for a given object (e.g. project/group/user) as object array
PUT
create / update metadata as object array