Duplicate Template

Duplicate a template. This page documents the OpenSend-owned API contract for POST /templates/{id}/duplicate.

POST /templates/{id}/duplicate

Authentication

Use an OpenSend API key in the Authorization header. Dashboard session cookies are not API credentials for public API clients.

http

Authorization: Bearer os_YOUR_API_KEY

When to use it

Template routes manage stored email templates. Published templates can be used by sends and broadcasts; draft and preview behavior depends on the renderer metadata stored with the template. Create a copy that can be edited independently from the source template.

Parameters

Path parameters identify the tenant-scoped resource. JSON body fields are validated by the route before any database write.

Request example

json

{
  "name": "Welcome",
  "subject": "Welcome to OpenSend",
  "html": "<p>Hello {{name}}</p>"
}

Response

Successful responses return JSON scoped to the authenticated tenant. A representative response shape is:

json

{
  "id": "template_123",
  "name": "Welcome",
  "status": "draft"
}

Errors

OpenSend returns structured errors for missing authentication, validation failures, not-found resources, quota/rate-limit conditions, and unexpected server failures. Treat 404 as either missing or not owned by the caller.

Self-hosting notes

Self-hosted deployments can use the same path on their own OPENSEND_BASE_URL. Run migrations before deploying code that expects new fields, and keep API keys in a secrets manager instead of committing them to source control.