Get hourly sending statistics
Returns one row of aggregate sending statistics per hour for the workspace: UTC hours by default, or your local hours when timezone is set (a timezone with a sub-hour offset gets correctly aligned hours). Useful for inspecting send rate, deliverability, and engagement inside a single day or a recent window; hours with no activity are included with zero counts.
Rows use event time. For example, a click recorded at 14:07 for a message sent at 09:00 lands in the 14:00 row.
A single request may span at most 30 days (720 hourly rows); for longer ranges use the daily endpoint, which has a 365-day window. An hourly window longer than 30 days, or a from after to, returns 422.
Request
- Base URL: https://us1.platform.bird.com
- URL: https://us1.platform.bird.com/v1/email/stats/hourly
- Auth: one of:
- HTTP bearer
- API key in cookie bird_session
Query parameters
Start of the window (ISO 8601 instant). Rounded down to the start of its hour (the local hour when timezone is set, otherwise the UTC hour), and that hour is included. When timezone is set, a numeric UTC offset here (for example +05:45) is rejected; use a Z (UTC) instant. Defaults to 7 days before to when omitted.
End of the window (ISO 8601 instant). Rounded down to the start of its hour (the local hour when timezone is set, otherwise the UTC hour), and that hour is included (both bounds inclusive). When timezone is set, a numeric UTC offset here is rejected; use a Z (UTC) instant. Defaults to the current hour when omitted. Window may not exceed 30 days (720 hours).
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.
Restrict the statistics to a category or a comma-separated union of categories: transactional or marketing. Mutually exclusive with the other dimension filters; only one may be set per request.
Restrict the statistics to a sending domain or a comma-separated union of sending domains (the part of the From address after @). Mutually exclusive with the other dimension filters; only one may be set per request.
Restrict the statistics to a tag. Use name to match any value of a tag, or name:value for a specific pair (for example campaign:spring_launch). To combine values of one tag name, separate complete pairs with commas, such as campaign:spring,campaign:summer. Different tag names cannot be combined. Mutually exclusive with the other dimension filters; only one may be set per request.
Restrict the statistics to a sending IP or a comma-separated union of IPs. Mutually exclusive with the other dimension filters; only one may be set per request. A sending IP is assigned only after a message reaches delivery, so this filter reports delivery-side metrics only. Accepted, processed, rejected, complaint, and engagement counts are 0, and processing latency is null. Complaint, open, and click rates are 0 when deliveries exist and null otherwise.
Restrict the statistics to a recipient mailbox domain or a comma-separated union of domains (the part of the recipient address after the @, for example gmail.com). Mutually exclusive with the other dimension filters; only one may be set per request.
Restricts the statistics to a template or a comma-separated union of templates, identified by ID (emt_…) or name. This parameter is mutually exclusive with other dimension filters.
Headers
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.
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
Hourly aggregate stats for the requested period.
Example response
{
"period": {
"from": "2026-05-01",
"to": "2026-05-31",
"grain": "day",
"data_as_of": "2026-05-25T14:03:10Z"
},
"data": [
{
"bucket": "2026-05-25",
"sends_accepted": 412,
"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
}
}
}
]
}Changes
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