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PATCH
/
api
/
v1
/
emails
/
{emailId}
Update Email
curl --request PATCH \
  --url https://api.sequenzy.com/api/v1/emails/{emailId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "subject": "<string>",
  "previewText": "<string>",
  "html": "<string>",
  "blocks": [
    {}
  ]
}
'
{
  "success": true,
  "email": {
    "id": "email_123",
    "companyId": "company_123",
    "name": "Welcome",
    "subject": "Updated welcome",
    "previewText": null,
    "blocks": [{ "id": "block_123", "type": "text", "variant": "html", "content": "<p>Updated body</p>" }],
    "createdAt": "2026-04-19T12:00:00.000Z",
    "updatedAt": "2026-04-19T12:05:00.000Z"
  }
}

​
Update Email

You can update an email’s metadata and replace its body with either raw HTML or structured blocks.

​
Request

​
emailId
string
required
Email ID.
​
name
string
Email name.
​
subject
string
Email subject line.
​
previewText
string
Inbox preview text. Use null to clear it.
​
html
string
Raw HTML body. Provide either html or blocks, not both.
​
blocks
array
Structured email blocks. Provide either blocks or html, not both. Put block styling under styles; top-level style keys like backgroundColor, backgroundOpacity, borderColor, borderWidth, and borderRadius are normalized into styles.
curl -X PATCH "https://api.sequenzy.com/api/v1/emails/email_123" \
  -H "Authorization: Bearer API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"subject":"Updated welcome","html":"<p>Updated body</p>"}'

​
Responses

{
  "success": true,
  "email": {
    "id": "email_123",
    "companyId": "company_123",
    "name": "Welcome",
    "subject": "Updated welcome",
    "previewText": null,
    "blocks": [{ "id": "block_123", "type": "text", "variant": "html", "content": "<p>Updated body</p>" }],
    "createdAt": "2026-04-19T12:00:00.000Z",
    "updatedAt": "2026-04-19T12:05:00.000Z"
  }
}