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POST
/
v1
/
contacts
/
properties
Create contact property
curl --request POST \
  --url https://app.loops.so/api/v1/contacts/properties \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "type": "<string>"
}
'
{
  "success": true
}

​
Request

​
Body

​
name
string
required
The name of the property.
This should be in camelCase, like planName or favoriteColor.
​
type
string
required
The property’s value type.Allowed values:
  • string
  • number
  • boolean
  • date
There are a few reserved names that you cannot use for contact properties.

​
Response

​
Success

​
success
boolean
required

​
Error

Errors will be 400 Bad Request.
​
success
boolean
required
​
message
string
required
An error message describing the problem with the request.
{
  "success": true
}
Last modified on October 15, 2025