POST
/
v1
/
tax
/
unify
Unified Tax Rate + Tax ID Validation
curl --request POST \
  --url https://sandbox.antei.com/v1/tax/unify \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "product_id": "prod_abc123",
  "delivery_method": "CLOUD",
  "customer_id": "cust_xyz456",
  "tax_id": "US123456789",
  "country": "US",
  "state": "CA",
  "postal_code": "94016",
  "ip_address": "192.168.1.1",
  "customer_name": "Acme Inc."
}'
{
  "taxability": true,
  "country_rate": 123,
  "state_rate": 123,
  "county_rate": 123,
  "additional_rate": 123,
  "special_rate": 123,
  "total_rate": 123,
  "reverse_charge_applicable": true,
  "exempt": true,
  "tax_id_valid": true,
  "customer_name_registry": "<string>",
  "customer_name_match": true,
  "customer_type": "<string>",
  "validated_country": "<string>",
  "validated_state": "<string>",
  "registry_address": "<string>",
  "validation_source": "<string>",
  "validation_timestamp": "2023-11-07T05:31:56Z",
  "request_id": "<string>"
}
Use this endpoint to perform both tax rate calculation and tax ID validation in one unified request. Ideal for checkout, invoicing, or compliance flows where both functions are needed together.

​
Request Parameters

You must send a request body with the following fields:

​
Response Fields

The response includes two major sections: Tax Calculation and Tax ID Validation.

​
Notes

All rate fields are integers multiplied by 1000 (e.g., 19000 = 19%)
If both product_id and product_category are provided, product_id takes priority
If both customer_id and customer_type are provided, customer_id takes priority
Reverse charge is determined automatically based on customer and jurisdiction
Ideal for invoicing systems, global checkout flows, or ERP automations

Authorizations

​
Authorization
string
header
required

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

Headers

​
Idempotency-Key
string

Optional. Unique key to ensure idempotent operations (e.g., retry-safe requests).

Body

application/json

Response

200
application/json

Unified tax result and tax ID validation

The response is of type object.