email-stats

Get engagement by email client

Returns engagement counts (opens and clicks) for the requested period, grouped by the email client, operating system, or device type they were recorded from. Use it for the classic view of opens by mail client, for example the share of opens from Apple Mail compared with Gmail and Outlook. The reading environment is only known from open and click events, so rows have engagement counts but no delivery counts or rates.

Use group_by to choose the facet: email_client (the default), os, or device_type. Each row fills in the facet you chose and leaves the other two null. Rows are ranked by the sort metric, unique_opens by default, and paginated with the requested limit (50 by default, 200 at most).

Rows are computed against event time rather than send time. The window can span at most 365 days. Ask for more and you get a 422.

get/v1/email/stats/clients

Request

  • Base URL: https://us1.platform.bird.com
  • URL: https://us1.platform.bird.com/v1/email/stats/clients
  • Auth: one of:
    • HTTP bearer
    • API key in cookie bird_session

Query parameters

starting_afterstring

Cursor from the next_cursor field of a previous list response. Returns items immediately after the cursor position in the current sort order.

ending_beforestring

Cursor from the prev_cursor or refresh_cursor field of a previous list response. Returns items immediately before the cursor position in the current sort order. prev_cursor returns the preceding page. refresh_cursor anchors at the first row of that response, which on a newest-first sort is how to fetch the items that have appeared since.

fromstring date
Example:2026-05-01

Start date (inclusive) in YYYY-MM-DD, interpreted as a calendar day in timezone (a UTC day when timezone is omitted). Defaults to 30 days before to when omitted.

tostring date
Example:2026-05-25

End date (inclusive) in YYYY-MM-DD, interpreted as a calendar day in timezone (a UTC day when timezone is omitted). Defaults to today in that timezone when omitted. Window may not exceed 365 days.

timezonestring
Example:Asia/Kathmandu

IANA timezone identifier used to group statistics, for example Asia/Kathmandu. The default is UTC. Day and hour boundaries, including the default window when from and to are omitted, follow this timezone. When this parameter is set, pass from and to as calendar days or Z instants instead of timestamps with explicit UTC offsets.

categorystring

Not supported on breakdown endpoints; supplying it returns 422. To compare categories use GET /v1/email/stats/categories; the summary, daily, and hourly statistics accept category as a filter.

group_by'email_client' | 'os' | 'device_type'

Which reading-environment facet to group rows by. email_client (default) groups by mail client; os groups by operating system; device_type groups by device type. Each row populates the chosen facet and leaves the other two null.

sort'opens' | 'opens_non_prefetched' | 'unique_opens' | 'unique_opens_non_prefetched' | 'clicks' | 'unique_clicks'

Metric to rank rows by, applied descending. Shared by the engagement-only breakdowns (locations, email clients), which report open and click counts but no rates because delivery events provide no per-dimension denominator.

Metric to rank rows by, applied descending. It defaults to unique_opens. Only engagement counts are sortable. This breakdown has no rates.

limitinteger

Maximum number of client rows to return, ranked by the sort field descending.

Headers

X-Workspace-Idstring

Workspace context for the request. Required for dashboard authentication and master keys. Workspace keys and access tokens already identify their workspace; send that workspace or omit the header. A different one is rejected.

X-Organization-Idstring

Organization context for the request. Required for dashboard authentication. An API key or access token carries its own organization, so send either that organization or no header at all; a different one is rejected.

Response

Per-client engagement breakdown for the requested period.

totalinteger required

Total number of distinct values of the requested group_by facet with activity in the period, regardless of limit. Pass next_cursor as starting_after to request the next page.

next_cursorstring nullable required

Cursor for the next page. Pass back as starting_after to advance forward. null when no next page exists.

prev_cursorstring nullable required

Cursor for the previous page. Pass back as ending_before to step backward. null when no previous page exists.

refresh_cursorstring nullable required

Refresh anchor, the first row of this response. Pass back as ending_before to fetch what precedes it in the current sort order. On a newest-first sort those are the items that have appeared since; on any other sort they are the items that sort earlier, so refreshing such a list means re-fetching it instead. Non-null whenever data is non-empty; null only on an empty page. Distinct from prev_cursor.

Example response

{
  "period": {
    "from": "2026-05-01",
    "to": "2026-05-25",
    "data_as_of": "2026-05-25T14:03:10Z"
  },
  "data": [
    {
      "email_client": "Apple Mail",
      "os": "iOS",
      "device_type": "mobile",
      "engagement": {
        "opens": 5420,
        "opens_non_prefetched": 3210,
        "unique_opens": 3640,
        "unique_opens_non_prefetched": 2480,
        "clicks": 924,
        "unique_clicks": 621
      }
    }
  ],
  "total": 9,
  "next_cursor": "eyJ2IjoxLCJzIjoiXCIyMDI2LTA1LTI1VDE0OjAzOjEwWlwiIiwiaSI6IjAxOTJmM2IxLTRjN2UtN2EyYi05ZDYxLThmM2E1YzJlN2I0MCJ9",
  "refresh_cursor": "eyJ2IjoxLCJzIjoiXCIyMDI2LTA1LTI1VDE2OjQyOjAxWlwiIiwiaSI6IjAxOTJmM2IxLTllMDQtN2NkMy1iODE3LTJhNmY0ZDFjOGUwOSJ9"
}

Changes

No recorded changes to this operation across all 2 revisions of this API.