Are you on the free plan? The maximum number of results from the API for any single query is 100 for free accounts.

Otherwise, keep the following points in mind:

1) The default limit is 10.

2) For limit you can set any value between 1 and 1000, or 'all' for up to 1000 results.

3) You can page through results. limit=100&page=1 will give you 1-100, limit=100&page=2 will give you 101-200, etc.

4) If you are requesting visitors-list, actions-list, and segmentation, you may be getting throttled.