Publish a template's draft

POST
/v1/email_templates/{id}/publish

Copies the draft into the next version, which sends use from then on. Emails already accepted keep the content they were rendered with. A draft without changes since the last publish returns that version, so retrying with the revision you reviewed is safe (without it, a retry could publish edits saved in between).

Authorization

bearerAuth
headerAuthorizationBearer <token>

A secret API key from the dashboard: coss_live_… for production environments, coss_test_… for sandbox environments.

Path Parameters

id*string

The template's id or alias.

Header Parameters

Coss-Version?"2026-10-10"

The API version (a date) to use for this request. Defaults to your organization's version, pinned to the latest one when it first used the API and upgraded from the dashboard. The SDK always sends the version it was built for.

Value in"2026-10-10"

Request Body

application/json
  1. body
revision?integer

The draft revision you read. When given, the request is refused (template_revision_mismatch) if the draft changed since.

Range1 <= value

Response Body

The published version.

application/json
  1. response
object*"email_template_version"
Value in"email_template_version"
template_id*string
version*|

The version number; null for the draft.

revision*integer

Counts the draft's saves. A published version keeps the revision it was published from.

default_locale*string
variables*array<>
sample_variables*
contents*array<>
problems*array<>

Syntax errors and undeclared variables per locale and field, which keep a draft from being published. Always empty for published versions.

published_at*|
Formatdate-time
created_at*string
Formatdate-time
updated_at*string
Formatdate-time
import { Coss } from "coss";const coss = new Coss({  apiKey: process.env.COSS_API_KEY,  baseUrl: "https://api.coss.com",});const { data, error } = await coss.email.templates.publish("etpl_01k7c8m4q2f3e9v6t5r1n0p8yz", {  revision: 3,});
{  "object": "email_template_version",  "template_id": "etpl_01k7c8m4q2f3e9v6t5r1n0p8yz",  "version": 2,  "revision": 3,  "default_locale": "en",  "variables": [    {      "name": "first_name",      "type": "string",      "required": true    }  ],  "sample_variables": {    "first_name": "Ada"  },  "contents": [    {      "locale": "en",      "subject": "Welcome, {{first_name}}",      "html": "<p>Hi {{first_name}}, thanks for signing up!</p>",      "text": null    }  ],  "problems": [],  "published_at": "2026-10-10T12:00:00.000Z",  "created_at": "2026-10-10T12:00:00.000Z",  "updated_at": "2026-10-10T12:00:00.000Z"}