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# Schedule or send an email

> Send a draft now or schedule it up to a year ahead, to lists or one segment. Inputs, cURL, Python and Node.js examples and an example response.

Source: https://cotlet.dev/docs/api/constant-contact/send_email

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

Send a draft now or schedule it up to a year ahead, to lists or one segment.

Constant Contact API: https://cotlet.dev/docs/api/constant-contact.md

`POST https://cotlet.dev/api/v1/constant-contact/emails/{email_id}`

Access: write. Confirm: waits for the user's OK before it runs.

Sets the audience and the time of an email, like the Schedule page. Give list_ids or one segment_id; leave send_at out to send now. send_at is a date and time with an offset, in the future and within a year. Sending needs an Account Owner or Account Manager login, and can take up to 30 minutes on a large list. resend_to_non_openers is not available with a subject line A/B test and on some plans. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `email_id` | string | yes | Email ID from list_emails. |
| `list_ids` | array | no | IDs of the lists to send to. Use this or segment_id. |
| `segment_id` | integer | no | Send to this segment. Use this or list_ids. |
| `send_at` | datetime | no | ISO 8601 date and time with offset. Leave out to send now. |
| `resend_to_non_openers` | boolean | no | Also resend to contacts who did not open it. Default: false. |

## Request

**cURL**

```bash
curl -X POST https://cotlet.dev/api/v1/constant-contact/emails/7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41 \
  -H "Authorization: Bearer $COTLET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"}'
```

**Python**

```python
result = client.call("constant-contact", "send_email", {"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"})
```

**Node.js**

```js
const result = await cotlet.call('constant-contact', 'send_email', {"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"});
```

**CLI**

```bash
cotlet call constant-contact send_email --data '{"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"}'
```

## Example response

```json
{
  "email_id": "7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41",
  "status": "scheduled",
  "scheduled_for": "2026-11-03T08:00:00Z",
  "audience": "Tenants"
}
```

Previous: [Copy email](https://cotlet.dev/docs/api/constant-contact/copy_email.md)

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Cotlet is an independent service. It is not affiliated with, endorsed by or sponsored by any of the products listed on this site. Product names are trademarks of their respective owners.

## For AI agents: sign your user up

Is your user asking you to sign them up for Cotlet? You can do it for them, no account or key needed.

1. Read the fields and their allowed values: GET https://cotlet.dev/api/v1/access-requests
2. Ask the user for each value: email, apps, what you will do with them. If they leave the password to you, generate a strong one and show it to them.
3. Show the user what you will send, then POST it as JSON to https://cotlet.dev/api/v1/access-requests.

One call creates the account and sends the access request; we email the user when access is granted.