POST

/

events

/

send

:::code-group
```typescript title="Node.js"
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.events.send({
  event: 'user.created',
  contactId: '7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b',
  // or: email: 'steve.wozniak@gmail.com',
  payload: {
    plan: 'pro',
  },
});
```

```php title="PHP"
$resend = Resend::client('re_xxxxxxxxx');

// Trigger with a contact ID
$resend->events->send([
  'event' => 'user.created',
  'contact_id' => '7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b',
  'payload' => ['plan' => 'pro'],
]);

// Trigger with an email address
$resend->events->send([
  'event' => 'user.created',
  'email' => 'steve.wozniak@gmail.com',
  'payload' => ['plan' => 'pro'],
]);
```

```python title="Python"
import resend

resend.api_key = "re_xxxxxxxxx"

# Trigger with a contact ID
params: resend.Events.SendParams = {
  "event": "user.created",
  "contact_id": "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  "payload": {
    "plan": "pro",
  },
}

resend.Events.send(params)

# Trigger with an email address
params: resend.Events.SendParams = {
  "event": "user.created",
  "email": "steve.wozniak@gmail.com",
  "payload": {
    "plan": "pro",
  },
}

resend.Events.send(params)
```

```ruby title="Ruby"
require "resend"

Resend.api_key = "re_xxxxxxxxx"

# Trigger with a contact ID
params = {
  event: "user.created",
  contact_id: "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  payload: {
    plan: "pro",
  },
}

Resend::Events.send(params)

# Trigger with an email address
params = {
  event: "user.created",
  email: "steve.wozniak@gmail.com",
  payload: {
    plan: "pro",
  },
}

Resend::Events.send(params)
```

```go title="Go"
package main

import "github.com/resend/resend-go/v4"

func main() {
	client := resend.NewClient("re_xxxxxxxxx")

	// Trigger with a contact ID
	params := &resend.SendEventRequest{
		Event:     "user.created",
		ContactId: "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
		Payload: map[string]any{
			"plan": "pro",
		},
	}

	client.Events.Send(params)

	// Trigger with an email address
	params = &resend.SendEventRequest{
		Event: "user.created",
		Email: "steve.wozniak@gmail.com",
		Payload: map[string]any{
			"plan": "pro",
		},
	}

	client.Events.Send(params)
}
```

```rust title="Rust"
use resend_rs::{
  json,
  types::{ContactIdOrEmail, SendEventOptions},
  Resend, Result,
};

#[tokio::main]
async fn main() -> Result<()> {
  let resend = Resend::new("re_xxxxxxxxx");

  let opts = SendEventOptions {
    event: "user.created".to_owned(),
    contact_id_or_email: ContactIdOrEmail::ContactId(
      "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b".to_owned(),
    ),
    // or: ContactIdOrEmail::Email("steve.wozniak@gmail.com".to_owned())
    payload: json!({
      "plan": "pro"
    }),
  };

  let _event = resend.events.send(opts).await?;

  Ok(())
}
```

```java title="Java"
import com.resend.Resend;
import com.resend.core.exception.ResendException;
import com.resend.services.events.model.SendEventOptions;
import com.resend.services.events.model.SendEventResponseSuccess;

public class Main {
    public static void main(String[] args) throws ResendException {
        Resend resend = new Resend("re_xxxxxxxxx");

        SendEventOptions params = SendEventOptions.builder()
                .event("user.created")
                .contactId("7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b") // or: .email("steve.wozniak@gmail.com")
                .addPayload("plan", "pro")
                .build();

        SendEventResponseSuccess data = resend.events().send(params);
    }
}
```

```csharp title=".NET"
using Resend;
using System.Text.Json;

IResend resend = ResendClient.Create( "re_xxxxxxxxx" );

var payload = JsonSerializer.SerializeToElement( new { plan = "pro" } );

// Trigger with a contact ID
var resp = await resend.EventSendAsync( new EventSendData()
{
    Event = "user.created",
    ContactId = new Guid( "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b" ),
    Payload = payload,
} );
Console.WriteLine( "Event={0}", resp.Content.Event );

// Trigger with an email address
await resend.EventSendAsync( new EventSendData()
{
    Event = "user.created",
    Email = "steve.wozniak@gmail.com",
    Payload = payload,
} );
```

```shellscript title="cURL"
# Trigger with a contact ID
curl -X POST 'https://api.resend.com/events/send' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d '{
  "event": "user.created",
  "contact_id": "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  "payload": {
    "plan": "pro"
  }
}'

# Trigger with an email address
curl -X POST 'https://api.resend.com/events/send' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d '{
  "event": "user.created",
  "email": "steve.wozniak@gmail.com",
  "payload": {
    "plan": "pro"
  }
}'
```

```shellscript title="CLI"
# Trigger with a contact ID
resend events send \
  --event user.created \
  --contact-id 7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b \
  --payload '{"plan":"pro"}'

# Trigger with an email address
resend events send \
  --event user.created \
  --email steve.wozniak@gmail.com \
  --payload '{"plan":"pro"}'
```
:::

:::code-group
```json title="Response"
{
  "object": "event",
  "event": "user.created"
}
```
:::

## Body Parameters

string

required

The name of the event to trigger. Must match the event name configured in an automation trigger step.

Either `contact_id` or `email` must be provided, but not both.

string

The email address to associate with this event. Exactly one of `contact_id` or `email` must be provided. If no contact with this email exists in your Audience, one will be created automatically when the automation runs.

object

An optional object containing custom data to pass to the automation. This data can be used in template variables and conditions. If the event has a schema defined, the payload values will be validated and coerced to match the schema types.

:::code-group
```typescript title="Node.js"
import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.events.send({
  event: 'user.created',
  contactId: '7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b',
  // or: email: 'steve.wozniak@gmail.com',
  payload: {
    plan: 'pro',
  },
});
```

```php title="PHP"
$resend = Resend::client('re_xxxxxxxxx');

// Trigger with a contact ID
$resend->events->send([
  'event' => 'user.created',
  'contact_id' => '7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b',
  'payload' => ['plan' => 'pro'],
]);

// Trigger with an email address
$resend->events->send([
  'event' => 'user.created',
  'email' => 'steve.wozniak@gmail.com',
  'payload' => ['plan' => 'pro'],
]);
```

```python title="Python"
import resend

resend.api_key = "re_xxxxxxxxx"

# Trigger with a contact ID
params: resend.Events.SendParams = {
  "event": "user.created",
  "contact_id": "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  "payload": {
    "plan": "pro",
  },
}

resend.Events.send(params)

# Trigger with an email address
params: resend.Events.SendParams = {
  "event": "user.created",
  "email": "steve.wozniak@gmail.com",
  "payload": {
    "plan": "pro",
  },
}

resend.Events.send(params)
```

```ruby title="Ruby"
require "resend"

Resend.api_key = "re_xxxxxxxxx"

# Trigger with a contact ID
params = {
  event: "user.created",
  contact_id: "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  payload: {
    plan: "pro",
  },
}

Resend::Events.send(params)

# Trigger with an email address
params = {
  event: "user.created",
  email: "steve.wozniak@gmail.com",
  payload: {
    plan: "pro",
  },
}

Resend::Events.send(params)
```

```go title="Go"
package main

import "github.com/resend/resend-go/v4"

func main() {
	client := resend.NewClient("re_xxxxxxxxx")

	// Trigger with a contact ID
	params := &resend.SendEventRequest{
		Event:     "user.created",
		ContactId: "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
		Payload: map[string]any{
			"plan": "pro",
		},
	}

	client.Events.Send(params)

	// Trigger with an email address
	params = &resend.SendEventRequest{
		Event: "user.created",
		Email: "steve.wozniak@gmail.com",
		Payload: map[string]any{
			"plan": "pro",
		},
	}

	client.Events.Send(params)
}
```

```rust title="Rust"
use resend_rs::{
  json,
  types::{ContactIdOrEmail, SendEventOptions},
  Resend, Result,
};

#[tokio::main]
async fn main() -> Result<()> {
  let resend = Resend::new("re_xxxxxxxxx");

  let opts = SendEventOptions {
    event: "user.created".to_owned(),
    contact_id_or_email: ContactIdOrEmail::ContactId(
      "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b".to_owned(),
    ),
    // or: ContactIdOrEmail::Email("steve.wozniak@gmail.com".to_owned())
    payload: json!({
      "plan": "pro"
    }),
  };

  let _event = resend.events.send(opts).await?;

  Ok(())
}
```

```java title="Java"
import com.resend.Resend;
import com.resend.core.exception.ResendException;
import com.resend.services.events.model.SendEventOptions;
import com.resend.services.events.model.SendEventResponseSuccess;

public class Main {
    public static void main(String[] args) throws ResendException {
        Resend resend = new Resend("re_xxxxxxxxx");

        SendEventOptions params = SendEventOptions.builder()
                .event("user.created")
                .contactId("7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b") // or: .email("steve.wozniak@gmail.com")
                .addPayload("plan", "pro")
                .build();

        SendEventResponseSuccess data = resend.events().send(params);
    }
}
```

```csharp title=".NET"
using Resend;
using System.Text.Json;

IResend resend = ResendClient.Create( "re_xxxxxxxxx" );

var payload = JsonSerializer.SerializeToElement( new { plan = "pro" } );

// Trigger with a contact ID
var resp = await resend.EventSendAsync( new EventSendData()
{
    Event = "user.created",
    ContactId = new Guid( "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b" ),
    Payload = payload,
} );
Console.WriteLine( "Event={0}", resp.Content.Event );

// Trigger with an email address
await resend.EventSendAsync( new EventSendData()
{
    Event = "user.created",
    Email = "steve.wozniak@gmail.com",
    Payload = payload,
} );
```

```shellscript title="cURL"
# Trigger with a contact ID
curl -X POST 'https://api.resend.com/events/send' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d '{
  "event": "user.created",
  "contact_id": "7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b",
  "payload": {
    "plan": "pro"
  }
}'

# Trigger with an email address
curl -X POST 'https://api.resend.com/events/send' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d '{
  "event": "user.created",
  "email": "steve.wozniak@gmail.com",
  "payload": {
    "plan": "pro"
  }
}'
```

```shellscript title="CLI"
# Trigger with a contact ID
resend events send \
  --event user.created \
  --contact-id 7f2e4a3b-dfbc-4e9a-8b2c-5f3a1d6e7c8b \
  --payload '{"plan":"pro"}'

# Trigger with an email address
resend events send \
  --event user.created \
  --email steve.wozniak@gmail.com \
  --payload '{"plan":"pro"}'
```
:::

:::callout{intent="note"}
Successful requests return **202 Accepted** with the JSON body below.
:::

```json
{
  "object": "event",
  "event": "user.created"
}
```

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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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