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DELETE
/
audience
/
contacts
/
{contactId}
/
topics
/
{topicId}
Unsubscribe contact from topic
curl --request DELETE \
  --url https://app.lettr.com/api/audience/contacts/{contactId}/topics/{topicId} \
  --header 'Authorization: Bearer <token>'

Documentation Index

Fetch the complete documentation index at: https://docs.lettr.com/llms.txt

Use this file to discover all available pages before exploring further.

Unsubscribe a contact from a topic. Idempotent — returns 204 whether the subscription existed or not. Requires the audience:write scope and is blocked for sandbox API keys.

Authorizations

​
Authorization
string
header
required

API key for authentication

Path Parameters

​
contactId
string<uuid>
required

Contact ID

​
topicId
string<uuid>
required

Topic ID

Response

Unsubscribed (or no subscription existed)