Create a sequence email

curl --request POST \
  --url https://api.kit.com/v4/sequences/{sequence_id}/emails \
  --header 'Content-Type: application/json' \
  --header 'X-Kit-Api-Key: <api-key>' \
  --data '
{
  "subject": "Welcome to the sequence",
  "delay_value": 1,
  "delay_unit": "days",
  "preview_text": null,
  "content": null,
  "email_template_id": null,
  "published": null,
  "send_days": null,
  "position": null
}
'

require 'uri'
require 'net/http'

url = URI("https://api.kit.com/v4/sequences/{sequence_id}/emails")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-Kit-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"subject\": \"Welcome to the sequence\",\n  \"delay_value\": 1,\n  \"delay_unit\": \"days\",\n  \"preview_text\": null,\n  \"content\": null,\n  \"email_template_id\": null,\n  \"published\": null,\n  \"send_days\": null,\n  \"position\": null\n}"

response = http.request(request)
puts response.read_body

const options = {
  method: 'POST',
  headers: {'X-Kit-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    subject: 'Welcome to the sequence',
    delay_value: 1,
    delay_unit: 'days',
    preview_text: null,
    content: null,
    email_template_id: null,
    published: null,
    send_days: null,
    position: null
  })
};

fetch('https://api.kit.com/v4/sequences/{sequence_id}/emails', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.kit.com/v4/sequences/{sequence_id}/emails"

	payload := strings.NewReader("{\n  \"subject\": \"Welcome to the sequence\",\n  \"delay_value\": 1,\n  \"delay_unit\": \"days\",\n  \"preview_text\": null,\n  \"content\": null,\n  \"email_template_id\": null,\n  \"published\": null,\n  \"send_days\": null,\n  \"position\": null\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-Kit-Api-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.kit.com/v4/sequences/{sequence_id}/emails",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'subject' => 'Welcome to the sequence',
    'delay_value' => 1,
    'delay_unit' => 'days',
    'preview_text' => null,
    'content' => null,
    'email_template_id' => null,
    'published' => null,
    'send_days' => null,
    'position' => null
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Kit-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

import requests

url = "https://api.kit.com/v4/sequences/{sequence_id}/emails"

payload = {
    "subject": "Welcome to the sequence",
    "delay_value": 1,
    "delay_unit": "days",
    "preview_text": None,
    "content": None,
    "email_template_id": None,
    "published": None,
    "send_days": None,
    "position": None
}
headers = {
    "X-Kit-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "email": {
    "id": 35,
    "sequence_id": 153,
    "subject": "Welcome to the sequence",
    "preview_text": null,
    "email_address": "joe2662@ck.lol",
    "email_template_id": null,
    "published": false,
    "position": 0,
    "delay_value": 1,
    "delay_unit": "days",
    "send_days": [
      "monday",
      "tuesday",
      "wednesday",
      "thursday",
      "friday",
      "saturday",
      "sunday"
    ],
    "content": null
  }
}

{
  "errors": [
    "The access token is invalid"
  ]
}

{
  "errors": [
    "Not Found"
  ]
}

{
  "errors": [
    "subject can't be blank"
  ]
}

Sequence Emails

Create a sequence email

Adds a single email to a sequence. Each sequence email represents one step subscribers receive on their journey through the sequence — its position determines order, and delay_value / delay_unit / send_days determine when it fires relative to either the previous email or the subscriber’s entry.

subject, delay_value, and delay_unit are required. Day-based emails (delay_unit: "days") follow the parent sequence’s send_days and send_hour; their per-email send_days (e.g. ["monday", "wednesday"]) overrides the sequence schedule for that one email. Hour-based emails (delay_unit: "hours") ignore the sequence schedule and fire once the delay elapses — Kit checks for hour-delayed sends every 15 minutes — and always return send_days as null.

New emails are created in draft (published: false) so they don’t go out until you flip the flag. position is auto-assigned to the end of the sequence if omitted. content accepts HTML and can embed snippets with {{ snippet.<key> }} — see Create a snippet — which Kit resolves at send time, so editing a snippet later updates every email referencing it without a re-publish.

Note: only the first email in a sequence can be an immediate send (delay_value: 0 with delay_unit: "days"). Subsequent emails need a positive delay.

Warning: publishing an immediate first email, or inserting a new email at a position earlier than where existing subscribers sit, processes those subscribers and triggers a send right away. Plan around active sequences carefully.

For end-user context on how creators build sequences in the Kit UI, see the help article on creating and sending a sequence.

POST

sequences

{sequence_id}

emails

Create a sequence email

curl --request POST \
  --url https://api.kit.com/v4/sequences/{sequence_id}/emails \
  --header 'Content-Type: application/json' \
  --header 'X-Kit-Api-Key: <api-key>' \
  --data '
{
  "subject": "Welcome to the sequence",
  "delay_value": 1,
  "delay_unit": "days",
  "preview_text": null,
  "content": null,
  "email_template_id": null,
  "published": null,
  "send_days": null,
  "position": null
}
'

require 'uri'
require 'net/http'

url = URI("https://api.kit.com/v4/sequences/{sequence_id}/emails")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-Kit-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"subject\": \"Welcome to the sequence\",\n  \"delay_value\": 1,\n  \"delay_unit\": \"days\",\n  \"preview_text\": null,\n  \"content\": null,\n  \"email_template_id\": null,\n  \"published\": null,\n  \"send_days\": null,\n  \"position\": null\n}"

response = http.request(request)
puts response.read_body

const options = {
  method: 'POST',
  headers: {'X-Kit-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    subject: 'Welcome to the sequence',
    delay_value: 1,
    delay_unit: 'days',
    preview_text: null,
    content: null,
    email_template_id: null,
    published: null,
    send_days: null,
    position: null
  })
};

fetch('https://api.kit.com/v4/sequences/{sequence_id}/emails', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.kit.com/v4/sequences/{sequence_id}/emails"

	payload := strings.NewReader("{\n  \"subject\": \"Welcome to the sequence\",\n  \"delay_value\": 1,\n  \"delay_unit\": \"days\",\n  \"preview_text\": null,\n  \"content\": null,\n  \"email_template_id\": null,\n  \"published\": null,\n  \"send_days\": null,\n  \"position\": null\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-Kit-Api-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.kit.com/v4/sequences/{sequence_id}/emails",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'subject' => 'Welcome to the sequence',
    'delay_value' => 1,
    'delay_unit' => 'days',
    'preview_text' => null,
    'content' => null,
    'email_template_id' => null,
    'published' => null,
    'send_days' => null,
    'position' => null
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Kit-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

import requests

url = "https://api.kit.com/v4/sequences/{sequence_id}/emails"

payload = {
    "subject": "Welcome to the sequence",
    "delay_value": 1,
    "delay_unit": "days",
    "preview_text": None,
    "content": None,
    "email_template_id": None,
    "published": None,
    "send_days": None,
    "position": None
}
headers = {
    "X-Kit-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "email": {
    "id": 35,
    "sequence_id": 153,
    "subject": "Welcome to the sequence",
    "preview_text": null,
    "email_address": "joe2662@ck.lol",
    "email_template_id": null,
    "published": false,
    "position": 0,
    "delay_value": 1,
    "delay_unit": "days",
    "send_days": [
      "monday",
      "tuesday",
      "wednesday",
      "thursday",
      "friday",
      "saturday",
      "sunday"
    ],
    "content": null
  }
}

{
  "errors": [
    "The access token is invalid"
  ]
}

{
  "errors": [
    "Not Found"
  ]
}

{
  "errors": [
    "subject can't be blank"
  ]
}

Authorizations

X-Kit-Api-Key

string

header

required

Authenticate API requests via an API Key

Path Parameters

sequence_id

integer

required

Body

application/json

subject

string

required

Subject line of the email

delay_value

integer

required

Number of days or hours to wait before sending this email after the previous one

delay_unit

enum<string>

required

Unit for the send delay. Use days for schedule-aware delivery, hours for a fixed hourly delay

Available options:

days,

hours

preview_text

string | null

Preview text shown in email clients before the email is opened

content

string | null

HTML body content of the email

email_template_id

integer | null

ID of the email template to use for layout and styling

published

boolean

Whether the email is active and will be sent to subscribers. Defaults to false (draft)

send_days

string[] | null

Days of the week this email may be sent. Defaults to all 7 days (inherits the sequence schedule). Pass a subset to restrict delivery, or null to reset to all days

position

integer | null

Zero-based position of the email in the sequence. Assigned automatically after the last email if omitted

Response

Creates a new sequence email

object

required

Show child attributes

List sequence emails Get a sequence email

⌘I