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POST
https://app.loops.so/api
/
v1
/
contacts
/
create
Create contact
curl --request POST \
  --url https://app.loops.so/api/v1/contacts/create \
  --header 'Authorization: Bearer <token>'
{
  "success": true,
  "id": "id_of_contact"
}
If you want to “update or create” contacts, consider using the Update a contact endpoint instead.

​
Request

​
Body

​
email
string
required
The contact’s email address.
​
firstName
string
The contact’s first name.
​
lastName
string
The contact’s last name.
​
source
string
A custom source value to replace the default “API”. Read more
​
subscribed
boolean
default:true
Whether the contact will receive campaign and loops emails. Read more
​
userGroup
string
You can use groups to segment users when sending emails. Currently, a contact can only be in one user group. Read more
​
userId
string
A unique user ID (for example, from an external application). Read more
​
mailingLists
object
Manage mailing list subscriptions.
Include key-value pairs of mailing list IDs and a boolean denoting if the contact should be added (true) or removed (false) from the list. Read more
"mailingLists": {
  "cm06f5v0e45nf0ml5754o9cix": true,
  "cm16k73gq014h0mmj5b6jdi9r": false
}

​
Custom properties

You can also include custom contact properties in your request body. These should be added as top-level attributes in the request. Custom properties can be of type string, number, boolean or date (see allowed date formats). 
{
  "email": "[email protected]",
  "plan": "pro" /* Custom property */,
  "dateJoined": 1704711066 /* Custom property */
}
There are a few reserved names that you cannot use for custom properties.
To empty or reset the value of a contact property, send a null value.

​
Response

​
Success

​
success
boolean
required
​
id
string
required
The ID of the new contact.

​
Error

If a matching contact already exists in your audience, a 409 Conflict error will be returned. All other errors will be 400 Bad Request.
​
success
boolean
required
​
message
string
required
An error message describing the problem with the request.
{
  "success": true,
  "id": "id_of_contact"
}