Create a topic

POST/api/v1/email/topics

POST /email/topics

curl -X POST 'https://www.unitpost.com/api/v1/email/topics' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{
    "name": "Product updates",
    "default_opt_in": true
  }'

Response · 201

{
  "object": "topic",
  "id": "id_123",
  "name": "Example",
  "description": "string",
  "default_opt_in": false,
  "created_at": "2026-01-01T00:00:00.000Z",
  "updated_at": "2026-01-01T00:00:00.000Z"
}

Create a subscription topic — a category recipients can opt out of on their own (e.g. Promotions) while staying on your list. default_opt_in decides whether contacts with no explicit preference are treated as subscribed. Scope a campaign to a topic so opted-out contacts are skipped automatically via Create a campaign, and set an individual contact's preference with Set a contact's topic preference. Topics differ from segments: a segment decides who a campaign targets, a topic lets recipients opt out. Requires the topics:write capability.

Request body3 fields

Field	Type	Description
`name`required	string	—
`description`	string	—
`default_opt_in`	boolean	—

Response · 201 fields7 fields

Field	Type	Description
`object`required	string	—
`id`required	string	—
`name`required	string	—
`description`required	object	—
`default_opt_in`required	boolean	—
`created_at`required	string	—
`updated_at`required	string	—

201401409422

Create a topic

Create a topic

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