---
updatedAt: 2026-01-06T00:37:01.000Z
agentTools:
  projectIndex: https://developers.dovetail.com/llms.txt
---

# Filters

This guide describes how list resources can be filtered.

List resources in the API are filtered to allow clients to narrow down the results of their request.

By default, no filters are applied.

## Parameter types

[block:parameters]
{
  "data": {
    "h-0": "Type",
    "h-1": "Description",
    "0-0": "date-time",
    "0-1": "At Dovetail, dates are timestamps in the ISO 8601 format: `YYYY-MM-DDTHH:MM:SSSSSS.+0000`  \n  \nMultiple formats are supported for filtering:  \n  - `YYYY-MM-DD`  \n  - `YYYY-MM-DDTHH:MM:SS`  \n  - `YYYY-MM-DDTHH:MM:SSZ`  \n  - `YYYY-MM-DDTHH:MM:SS+0000`  \n  - `YYYY-MM-DDTHH:MM:SS.SSSSSS+0000`.  \n  \nTake note that the timezone is always `+0000` and hence any other timezone will be converted to `+0000` before comparison.  \n  \nRemember to apply proper URL encoding."
  },
  "cols": 2,
  "rows": 1,
  "align": [
    "left",
    "left"
  ]
}
[/block]