sendsend.email
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List contact properties

GET/v1/contact-properties

All custom fields in the project.

Required scope: contacts:manage

Example

curl -X GET 'https://api.sendsend.email/v1/contact-properties' \
  -H "Authorization: Bearer $SENDSEND_API_KEY"

Response 200

{
  "object": "list",
  "data": [
    {
      "id": "prop_Lm4…",
      "object": "contact_property",
      "key": "plan",
      "type": "string",
      "fallback_value": "free",
      "created_at": "2026-10-06T15:00:00.000Z"
    }
  ]
}

Errors

StatusCodeWhen
401unauthorizedThe API key is missing, invalid or revoked.
403forbiddenThe key does not have the scope this endpoint needs.

Every error has the same shape. See Errors.