# Retrieve Metrics

GET

/

emails

/

metrics

:::code-group
```typescript title="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 title="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)
```

```ruby title="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 title="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 title="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 title="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 title=".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> { MetricType.Sent, MetricType.Delivered, MetricType.OpenRate },
    Dimensions = new List<MetricDimension> { MetricDimension.Period, MetricDimension.Broadcast },
    BroadcastId = new List<Guid> { Guid.Parse( "5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a" ) },
} );
Console.WriteLine( "Totals={0}", resp.Content?.Totals );
```

```shellscript title="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 title="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
    }
  ]
}
```
:::

:::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

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`.

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.

string

default:"UTC"

The IANA timezone (e.g. `America/New_York`) used to bucket periods when `period` is in `dimensions`.

hourly | daily | weekly | monthly

default:"daily"

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`.

string\[]

List of metrics to include in the response. Omit for all. See [Metrics](#metrics).

string\[]

default:"\[]"

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`.

string\[]

List of sending domain IDs to restrict the response to, up to 100.

string\[]

List of email IDs to restrict the response to, up to 100. Cannot be combined with the `broadcast` dimension or `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
```typescript title="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 title="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)
```

```ruby title="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 title="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 title="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 title="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 title=".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> { MetricType.Sent, MetricType.Delivered, MetricType.OpenRate },
    Dimensions = new List<MetricDimension> { MetricDimension.Period, MetricDimension.Broadcast },
    BroadcastId = new List<Guid> { Guid.Parse( "5a5a3b1e-3b1a-4b1a-8b1a-3b1a4b1a8b1a" ) },
} );
Console.WriteLine( "Totals={0}", resp.Content?.Totals );
```

```shellscript title="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'
```
:::

```json
{
  "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
    }
  ]
}
```

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## 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)

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