POST
/
tax
/
customers
cURL
curl --request POST \
  --url https://api.numeralhq.com/tax/customers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "Customer Name",
  "email": "customer@example.com",
  "is_tax_exempt": true,
  "reference_customer_id": "20506"
}'
{
  "id": "cus_123456789",
  "object": "tax.customer",
  "reference_customer_id": "20506",
  "name": "Customer Name",
  "email": "customer@example.com",
  "is_tax_exempt": true
}

​
Customer Endpoint (2025-05-12)

Create a new customer, and optionally mark them as tax exempt.
Remember to include the X-API-Version: 2025-05-12 header in your request to use this API version.

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json
​
email
string
required

The customer's email

Example:

"customer@example.com"

​
name
string

The customer's name

Example:

"Customer Name"

​
is_tax_exempt
boolean

If true, all POST /tax/calculations sold to this customer will return $0 in tax owed. The default value is false.

Example:

true

​
reference_customer_id
string

The ID of the customer in your system

Example:

"20506"

Response

Customer creation response

​
id
string

The ID of the customer

Example:

"cus_123456789"

​
object
string

The type of object: tax.customer

Example:

"tax.customer"

​
reference_customer_id
string

The ID of the customer in your system

Example:

"20506"

​
name
string

The name of the created customer

Example:

"Customer Name"

​
email
string

The email of the created customer

Example:

"customer@example.com"

​
is_tax_exempt
boolean

If true, all POST /tax/calculations sold to this customer will return $0 in tax owed. The default value is false.

Example:

true