---
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
  - `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
    - `labels` string[]
  - `transactional` object, nullable

## Other responses

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

## Changes

- **2026-05-13** `9a89cb9ec599` — 3 info
  - added the new optional request property `label`
  - added the new optional request property `labels`
  - added the optional property `template/labels` to the response with the `200` status
- **2026-05-11** `ee7b7111c55b` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/sequenzy/apis/sequenzy-api/changes/templates/:templateId/put.md)

---

[API](https://skmtc.dev/sequenzy/apis/sequenzy-api.md) · [All operations](https://skmtc.dev/sequenzy/apis/sequenzy-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sequenzy/sequenzy-api/revisions/fd494fa7e64d/schema)