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Get statistics by category

GET
/v1/email/stats/categories
const { data } = await bird.email.stats.byCategory({ from: "2026-05-01", to: "2026-05-31" });
for (const row of data) console.log(row.category, row.delivery.delivered);
Antwort200
{
  "period": {
    "from": "2026-05-01",
    "to": "2026-05-25",
    "data_as_of": "2026-05-25T14:03:10Z"
  },
  "data": [
    {
      "category": "transactional",
      "delivery": {
        "accepted": 14820,
        "processed": 14810,
        "delivered": 14720,
        "bounced": 90,
        "bounces": {
          "hard": 12410,
          "soft": 14290,
          "admin": 410,
          "block": 920,
          "undetermined": 80,
          "hard_rate": 0.454,
          "soft_rate": 0.523,
          "admin_rate": 0.015,
          "block_rate": 0.0337,
          "undetermined_rate": 0.0029
        },
        "complained": 3,
        "deferred": 14,
        "rejected": 10,
        "oob_bounces": 2,
        "effective_delivered": 14718,
        "all_bounces": 92,
        "oob_rate": 0.00014,
        "delivery_rate": 0.9939,
        "bounce_rate": 0.0061,
        "complaint_rate": 0.0002
      },
      "engagement": {
        "opens": 5420,
        "opens_non_prefetched": 3210,
        "unique_opens": 3640,
        "unique_opens_non_prefetched": 2480,
        "clicks": 924,
        "unique_clicks": 621,
        "unsubscribes": 12,
        "open_rate": 0.1683,
        "click_rate": 0.0422,
        "unsubscribe_rate": 0.0009
      },
      "latency": {
        "processing": {
          "p50_ms": 420,
          "p95_ms": 1820,
          "p99_ms": 4920
        },
        "delivery": {
          "p50_ms": 420,
          "p95_ms": 1820,
          "p99_ms": 4920
        },
        "total": {
          "p50_ms": 420,
          "p95_ms": 1820,
          "p99_ms": 4920
        }
      },
      "trend": [
        {
          "bucket": "2026-05-12"
        }
      ]
    }
  ],
  "total": 2,
  "next_cursor": "eyJ2IjoxLCJzIjoiXCIyMDI2LTA1LTI1VDE0OjAzOjEwWlwiIiwiaSI6IjAxOTJmM2IxLTRjN2UtN2EyYi05ZDYxLThmM2E1YzJlN2I0MCJ9",
  "prev_cursor": null,
  "refresh_cursor": "eyJ2IjoxLCJzIjoiXCIyMDI2LTA1LTI1VDE2OjQyOjAxWlwiIiwiaSI6IjAxOTJmM2IxLTllMDQtN2NkMy1iODE3LTJhNmY0ZDFjOGUwOSJ9"
}

Returns delivery and engagement counts for the requested period, grouped by category, so you can compare deliverability and engagement between your transactional and marketing traffic. Rows are ranked by the sort metric, processed by default, and paginated with the requested limit (50 by default, 200 at most).

Rows are computed against event time rather than send time, so engagement received during the period counts even for messages that were sent earlier.

The window can span at most 365 days. Ask for more and you get a 422.

Abfrageparameter

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

Start date (inclusive) in YYYY-MM-DD, interpreted as a calendar day in timezone (a UTC day when timezone is omitted). It defaults to 30 days before to when you leave it out. When include_trend=true and trend_grain=hourly, that default tightens to 29 days before to instead, so the defaulted window still fits inside the 720-hour trend cap.

tostring

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

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.

sortstring

Metric to rank rows by, applied descending. Any count or rate in the response can be used. A row whose rate is undefined because its denominator is zero sorts last. It defaults to processed.

Possible values: processed, delivered, bounced, complained, deferred, rejected, oob_bounces, bounces.hard, bounces.soft, bounces.admin, bounces.block, bounces.undetermined, opens, opens_non_prefetched, unique_opens, unique_opens_non_prefetched, clicks, unique_clicks, unsubscribes, delivery_rate, bounce_rate, complaint_rate, open_rate, click_rate, unsubscribe_rate, bounces.hard_rate, bounces.soft_rate, bounces.admin_rate, bounces.block_rate, bounces.undetermined_rate

limitinteger

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

include_trendboolean

When true, each row also gets a trend array: a short per-bucket series showing that category's delivery and engagement rates over the window. This only works when limit is 50 or fewer and the window is at most 90 days for trend_grain=daily or 720 hours for trend_grain=hourly. Ask for more and you get a 422. When you leave from out and use trend_grain=hourly, the default window tightens to 29 days before to (720 hours total), so a request built entirely from defaults always fits inside the cap.

trend_grainstring

Bucket grain for the trend series. Has no effect unless include_trend=true.

Possible values: daily, hourly

Antwort-Payload

period
object
erforderlich

The date range the response covers (echoed back from the request), plus data_as_of, the freshness boundary the data is current to.

Untergeordnete Attribute anzeigen
data
array of object
erforderlich

Category breakdown rows, ranked by the sort metric (default processed) descending. Empty when no sends occurred in the period.

Untergeordnete Attribute anzeigen
data.category
string
erforderlich

The category this row aggregates, as set at send time. transactional is one-to-one mail triggered by a user action. marketing is bulk sending. New categories may be added over time.

data.delivery
object
erforderlich
Untergeordnete Attribute anzeigen
data.engagement
object
erforderlich
Untergeordnete Attribute anzeigen
data.latency
object
erforderlich
Untergeordnete Attribute anzeigen
data.trend
array of object

Per-bucket rate series for this category over the window. Present only when include_trend=true.

Untergeordnete Attribute anzeigen
data.trend.bucket
string
erforderlich

The day (YYYY-MM-DD) or hour (ISO 8601, on the hour) this point covers, matching the requested trend_grain.

data.trend.delivered
integer
erforderlich

Delivered recipients in this bucket.

data.trend.bounced
integer
erforderlich

Bounced recipients in this bucket.

data.trend.delivery_rate
nullable number
erforderlich

Delivery rate for this bucket, as a fraction. Null when nothing was delivered or bounced.

data.trend.bounce_rate
nullable number
erforderlich

Bounce rate for this bucket, as a fraction. Null when nothing was delivered or bounced.

data.trend.complaint_rate
nullable number
erforderlich

Complaint rate for this bucket, as a fraction. Event-time attribution can push it above 1 when complaints outrun the bucket's deliveries. Null when nothing was delivered in the bucket. On a sending-IP row complaints are not attributed to the IP, so this reads 0 in buckets that had deliveries and null in buckets that had none.

data.trend.open_rate
nullable number
erforderlich

Open rate for this bucket, as a fraction. Event-time attribution can push it above 1 when opens outrun the bucket's deliveries. Null when nothing was delivered in the bucket. On a sending-IP row engagement is not attributed to the IP, so this reads 0 in buckets that had deliveries and null in buckets that had none.

data.trend.click_rate
nullable number
erforderlich

Click rate for this bucket, as a fraction. Event-time attribution can push it above 1 when clicks outrun the bucket's deliveries. Null when nothing was delivered in the bucket. On a sending-IP row engagement is not attributed to the IP, so this reads 0 in buckets that had deliveries and null in buckets that had none.

total
integer
erforderlich

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

next_cursor
nullable string
erforderlich

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

prev_cursor
nullable string
erforderlich

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

refresh_cursor
nullable string
erforderlich

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.

Weiter mit der Dokumentation, Anleitungen und Beispielen zu diesem Thema.