---
title: "Update template"
method: PUT
path: "/templates/{templateId}"
tags: ["Templates"]
---

# Update template

`PUT /templates/{templateId}`

Updates template metadata, labels, or content. Transactional email IDs and slugs are also resolved for compatibility.

## Path parameters

- `templateId` string, required

## Request body

- object
  - `name` string
  - `subject` string
  - `previewText` string, nullable — Inbox preview text. Send null to clear it.
  - `html` string — Replacement HTML body. Mutually exclusive with blocks.
  - `blocks` object[] — Replacement Sequenzy email blocks. Mutually exclusive with html. Put visual styling under styles; top-level style keys such as backgroundColor, backgroundOpacity, borderColor, borderWidth, and borderRadius are normalized into styles.
  - `labels` string[] — Replacement label names. Send an empty array to clear labels. Missing labels are created automatically.
  - `label` string[] — Compatibility alias for labels.
  - `updates` unknown

## Response `200`

Template updated

- object
  - `success` boolean
  - `template` object
    - `id` string
    - `name` string
    - `subject` string
    - `previewText` string, nullable
    - `labels` string[]
  - `transactional` object, nullable
  - `warnings` string[] — Non-blocking advisories about a successful write. Present when an input was discarded or did not take effect as requested. This includes block fields that do not render as their names suggest, sequence email-step formatting restored on top of submitted blocks, and sender-identity conflicts such as a replyToName that differs from the saved profile. Each message identifies the affected input and gives recovery guidance. Absent when there is nothing to report.

## Other responses

- `400` — Validation error
- `401` — Unauthorized
- `404` — Template not found
- `500` — Template could not be updated

---

[API](https://skmtc.net/sequenzy/apis/sequenzy-api.md) · [All operations](https://skmtc.net/sequenzy/apis/sequenzy-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sequenzy/sequenzy-api/versions/af1cf9620482/schema)