# Retrieve Metrics :::callout{intent="note"} Metrics are retained according to your plan's data retention window. Requesting a `start_date` older than your retention window returns data clamped to the oldest date your plan retains. This doesn't apply when `broadcast_id` is set. ::: :::callout{intent="note"} Responses are cached for up to 15 minutes, so a request for the same range may return slightly stale data within that window. ::: All parameters are optional. With none, the response covers the last 7 days (today plus the 6 previous days), includes every metric, and returns only `totals`. ## Query Parameters List-type query parameters below accept a comma-separated value, the parameter repeated (`domain_id=a&domain_id=b`), or a mix of both. - `start_date` (string) — The start of the date range, as an ISO 8601 date (`2026-07-01`) or datetime (`2026-07-01T00:00:00Z`). Must be on or before `end_date`, and can equal it to query a single day. Defaults to 6 days before `end_date`. - `end_date` (string) — The end of the date range, as an ISO 8601 date or datetime. Values in the future are clamped to the current time. Defaults to now. - `timezone` (string) — The IANA timezone (e.g. `America/New_York`) used to bucket periods when `period` is in `dimensions`. - `granularity` (hourly | daily | weekly | monthly) — The bucket size used when `period` is in `dimensions`. Accepted but has no effect otherwise. The date range can't produce more than 10,000 periods at the chosen granularity. This limit only applies when `period` is in `dimensions`. - `metrics` (string\[]) — List of metrics to include in the response. Omit for all. See [Metrics](#metrics). - `dimensions` (string\[]) — List of dimensions to break the response down by. Combine any of `period`, `domain`, `email`, or `broadcast` to group the data by more than one at once, except `email` cannot be combined with `broadcast`. Omit for a single `totals` row for the whole range, with no `data`. Possible values: - `period`: groups the data by `granularity` period, in chronological order. - `domain`: groups the data by sending domain. - `email`: groups the data by email. Cannot be combined with `broadcast`. - `broadcast`: groups the data by broadcast. Cannot be combined with `email`. - `domain_id` (string\[]) — List of sending domain IDs to restrict the response to, up to 100. - `email_id` (string\[]) — List of email IDs to restrict the response to, up to 100. Cannot be combined with the `broadcast` dimension or `broadcast_id`. - `broadcast_id` (string\[]) — List of broadcast IDs to restrict the response to, up to 100. Cannot be combined with the `email` dimension or `email_id`. :::callout{intent="tip"} For a 24-hour breakdown of one day, set `start_date` and `end_date` to the same date, with `granularity=hourly` and `period` in `dimensions`. ::: ## Metrics | Metric | Description | | ---------------------- | ------------------------------------------------------------------------------------------------- | | `received` | Emails Resend accepted for processing. | | `sent` | Emails sent to the recipient's mail server. | | `delivered` | Emails the recipient's mail server accepted. | | `delivery_delayed` | Delivery postponed by a temporary issue. Not final. | | `failed` | Emails that never reached a mail server. | | `suppressed` | Skipped because the recipient is [suppressed](/guides/learn-dashboard-emails-email-suppressions). | | `bounced` | All [bounces](/guides/learn-dashboard-emails-email-bounces), summing the three below. | | `bounced_transient` | Soft bounce. Temporary, so a later send can succeed. | | `bounced_permanent` | Hard bounce. Permanent, and the address is suppressed. | | `bounced_undetermined` | Bounce with no classifiable reason. | | `opened` | Open events, including repeats. | | `unique_opened` | Emails opened at least once. | | `clicked` | Link click events, including repeats. | | `unique_clicked` | Emails clicked at least once. | | `complained` | Delivered emails marked as spam. | | `unsubscribed` | Recipients who unsubscribed. | | `delivery_rate` | `delivered` / `sent` | | `open_rate` | `unique_opened` / `delivered` | | `click_rate` | `unique_clicked` / `delivered` | | `bounce_rate` | `bounced` / `sent` | | `complaint_rate` | `complained` / `delivered` | | `unsubscribe_rate` | `unsubscribed` / `delivered` | :::callout{intent="note"} Open and click metrics require [open and click tracking](/guides/learn-dashboard-domains-tracking) on the sending domain. ::: :::code-group ```ts Node.js import { Resend } from 'resend'; const resend = new Resend('re_xxxxxxxxx'); const { data } = await resend.emails.metrics({ startDate: '2026-07-01', endDate: '2026-07-08', metrics: ['sent', 'delivered', 'open_rate'], dimensions: ['period', 'broadcast'], broadcastId: ['5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a'], }); ``` ```python Python import resend resend.api_key = "re_xxxxxxxxx" params: resend.Emails.MetricsParams = { "start_date": "2026-07-01", "end_date": "2026-07-08", "metrics": ["sent", "delivered", "open_rate"], "dimensions": ["period", "broadcast"], "broadcast_id": ["5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a"], } metrics = resend.Emails.metrics(params) print(metrics) ``` ```rb Ruby require "resend" Resend.api_key = "re_xxxxxxxxx" params = { start_date: "2026-07-01", end_date: "2026-07-08", metrics: ["sent", "delivered", "open_rate"], dimensions: ["period", "broadcast"], broadcast_id: ["5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a"] } metrics = Resend::Emails.metrics(params) puts metrics ``` ```go Go package main import ( "context" "fmt" "github.com/resend/resend-go/v4" ) func main() { ctx := context.TODO() client := resend.NewClient("re_xxxxxxxxx") startDate := "2026-07-01" endDate := "2026-07-08" metrics, err := client.Emails.MetricsWithOptions(ctx, &resend.MetricsOptions{ StartDate: &startDate, EndDate: &endDate, Metrics: []resend.MetricName{ resend.MetricSent, resend.MetricDelivered, resend.MetricOpenRate, }, Dimensions: []resend.MetricsDimension{ resend.MetricsDimensionPeriod, resend.MetricsDimensionBroadcast, }, BroadcastId: []string{"5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a"}, }) if err != nil { panic(err) } fmt.Println(metrics.Totals) } ``` ```rust Rust use resend_rs::types::{GetEmailMetricsOptions, Metric}; use resend_rs::{Resend, Result}; #[tokio::main] async fn main() -> Result<()> { let resend = Resend::new("re_xxxxxxxxx"); let options = GetEmailMetricsOptions::default() .with_start_date("2026-07-01") .with_end_date("2026-07-08") .with_metrics([Metric::Sent, Metric::Delivered, Metric::OpenRate]) .with_period_dimension() .with_broadcast_dimension() .with_broadcast_id("5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a"); let _metrics = resend.emails.metrics(options).await?; Ok(()) } ``` ```java Java import com.resend.Resend; import com.resend.core.exception.ResendException; import com.resend.services.emails.model.*; public class Main { public static void main(String[] args) throws ResendException { Resend resend = new Resend("re_xxxxxxxxx"); GetEmailsMetricsOptions options = GetEmailsMetricsOptions.builder() .startDate("2026-07-01") .endDate("2026-07-08") .metrics(MetricName.SENT, MetricName.DELIVERED, MetricName.OPEN_RATE) .dimensions(MetricsDimension.PERIOD, MetricsDimension.BROADCAST) .broadcastIds("5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a") .build(); EmailsMetricsResponse metrics = resend.emails().metrics(options); } } ``` ```csharp .NET using Resend; IResend resend = ResendClient.Create( "re_xxxxxxxxx" ); var resp = await resend.EmailMetricsAsync( new EmailMetricsQuery() { StartDate = new DateTime( 2026, 7, 1 ), EndDate = new DateTime( 2026, 7, 8 ), Metrics = new List { MetricType.Sent, MetricType.Delivered, MetricType.OpenRate }, Dimensions = new List { MetricDimension.Period, MetricDimension.Broadcast }, BroadcastId = new List { Guid.Parse( "5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a" ) }, } ); Console.WriteLine( "Totals={0}", resp.Content?.Totals ); ``` ```bash cURL curl -X GET 'https://api.resend.com/emails/metrics?start_date=2026-07-01&end_date=2026-07-08&metrics=sent,delivered,open_rate&dimensions=period,domain' \ -H 'Authorization: Bearer re_xxxxxxxxx' ``` ::: :::code-group ```json Response { "object": "metrics", "start_date": "2026-07-01T00:00:00.000Z", "end_date": "2026-07-08T00:00:00.000Z", "metrics": ["sent", "delivered", "open_rate"], "dimensions": ["period", "domain"], "granularity": "daily", "totals": { "sent": 1204, "delivered": 1180, "open_rate": 50.0 }, "data": [ { "period": "2026-07-01", "domain_id": "d91cd9bd-1176-4f47-2a4b-fce2d5399cbf", "domain_name": "example.com", "sent": 172, "delivered": 169, "open_rate": 49.7 } ] } ``` ::: ## Related pages - [Account Management](./account-management-index.md) - [API Keys](./api-keys-2-index.md) - [API Keys](./api-keys-index.md) - [API Reference](./api-reference-index.md) - [AudiencesDEPRECATED](./audiencesdeprecated-index.md) - [Authorized Apps](./authorized-apps-index.md) - [Automations](./automations-index.md) - [Broadcasts](./broadcasts-index.md) - [Build with AI](./build-with-ai-index.md) - [Changelog](../changelog.md) # Agent Instructions Cite this page’s canonical URL and keep its documentation version. 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