maxResults parameter under /rest/agile/1.0/ REST API does not accept values greater than 50

Summary

When calling the REST API endpoints starting with rest/agile/1.0/board the value set for the parameter maxResults is not taken into account if it is bigger than '50' (it always return 50). The parameter startAt works fine instead.

Environment

Jira Server and Data Center

Steps to Reproduce

1- Call any agile/1.0/board endpoint passing a value for maxResults that is lower than 50
2- See that this works fine.
<BASE-URL>/rest/agile/1.0/board/ID/sprint?startAt=20&maxResults=20

{
  "maxResults": 20,
  "startAt": 20,
  "isLast": false,
  "values": [ .......

3- Call the same endpoint passing a value for maxResults that is bigger than 50. E.g.
<BASE-URL>/rest/agile/1.0/board/1/sprint?startAt=20&maxResults=70

Expected Results

The maxResults value in the REST response is correctly set to the desired value

Actual Results

maxResult is always set to 50

  "maxResults": 50,
  "startAt": 20,
  "isLast": true,
  "values": [.....

Notes

The same issue reproduces calling:

• /rest/agile/1.0/board
• /rest/agile/1.0/board/ID/project
• /rest/agile/1.0/board/ID/epic
• /rest/agile/1.0/board/ID/sprint

Workaround

Use the "startAt" parameter to get all the results