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POST
/
v1
/
tax
/
unify
Unified Tax Rate + Tax ID Validation
curl --request POST \
  --url https://api.antei.com/v1/tax/unify \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "product_id": "<string>",
  "customer_id": "<string>",
  "country": "<string>",
  "tax_id": "<string>",
  "product_category": "CSS",
  "is_security": true,
  "delivery_method": "CLOUD",
  "customer_type": "B2C",
  "state": "<string>",
  "county": "<string>",
  "postal_code": "<string>",
  "ip_address": "<string>",
  "customer_name": "<string>"
}
'
{
  "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:
  • product_id: (string, optional)
    Internal product ID
  • product_category: (string, optional)
    Category name (used if no product_id is provided). Must be one of:
    • CSS – Custom Software
    • DTSP – Dev & Tech Support Services - With Product
    • DAW – Digital Audio Works
    • DAVW – Digital Audio-Visual Works
    • DB – Digital Books
    • DP – Digital Photographs
    • IAAS – Infrastructure-as-a-Service (IaaS)
    • PAAS – Platform-as-a-Service (PaaS)
    • SAAS – Software-as-a-Service (SaaS)
    • PRSFT – Pre Written Software
    • RNGT – Ringtone
    • DSWS – Data & Web Hosting Services
    • GMO – Gaming
    • SSS – Streaming Services
    • DTSS – Development and Technical Support Services - Separate
    • INGMO – In-Game Purchases
  • is_security: (boolean, optional)
    Boolean flag to indicate if the product is a financial security
  • delivery_method: (string, required)
    Must be one of:
    • CLOUD – On Cloud Services
    • PHYSICAL – Physical Transfer
    • DOWN – Electronically Transferred
  • customer_id: (string, optional)
    Internal customer identifier
  • customer_type: (string, optional)
    Required if no customer_id is provided. Allowed values:
    • B2C – Business to Customer
    • B2B – Business to Business
    • PRISCH – Private Schools
    • PRIEDUI – Private Educational Institutions besides Schools
    • GOV – Government Entities
    • PUBSCH – Public Schools
    • PUBEDU – Public Educational Institutions besides Schools
    • PRIHOS – Private Hospitals
    • PUBHOS – Public Hospitals
    • NGO – Non Government Organisations
  • country: (string, required)
    Country code (ISO 3166 Alpha-2)
  • state: (string, optional)
    Region or state
  • county: (string, optional)
    Local jurisdiction
  • postal_code: (string, optional)
    ZIP or postal code
  • ip_address: (string, optional)
    Used for geolocation if address is unavailable
  • tax_id: (string, required)
    Tax ID to validate
  • customer_name: (string, optional)
    Used for name matching

​
Response Fields

The response includes two major sections: Tax Calculation and Tax ID Validation.
  • taxability: (boolean)
    Whether the product is taxable
  • country_rate: (integer)
    Country-level tax rate (×1000)
  • state_rate: (integer)
    State-level tax rate (×1000)
  • county_rate: (integer)
    County-level tax rate (×1000)
  • additional_rate: (integer)
    Surcharges (×1000)
  • special_rate: (integer)
    Special region-specific rates (×1000)
  • total_rate: (integer)
    Total tax rate (×1000)
  • reverse_charge_applicable: (boolean)
    Whether reverse charge applies
  • exempt: (boolean)
    Whether the transaction is tax-exempt
  • tax_id_valid: (boolean)
    Whether the tax ID is valid
  • customer_name_registry: (string)
    Name as retrieved from registry (if available)
  • customer_name_match: (boolean)
    Whether provided name matches registry name
  • customer_type: (string)
    Inferred or validated customer type
  • validated_country: (string)
    Country confirmed by registry
  • validated_state: (string)
    State confirmed by registry
  • registry_address: (string)
    Address from registry (if available)
  • validation_source: (string)
    Source used (e.g., VIES, GSTN)
  • validation_timestamp: (string)
    ISO timestamp of validation
  • request_id: (string)
    Internal ID for audit and traceability

​
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
​
product_id
string
required

ID of the product

​
customer_id
string
required

Customer ID

​
country
string
required

Country code (ISO Alpha-2)

​
tax_id
string
required

Tax Identification Number

​
product_category
enum<string>

Product category if ID is unavailable

Available options:
CSS,
DTSP,
DAW,
DAVW,
DB,
DP,
IAAS,
PAAS,
SAAS,
PRSFT,
RNGT,
DSWS,
GMO,
SSS,
DTSS,
INGMO
​
is_security
boolean

Is the product a financial security?

​
delivery_method
enum<string>

Product delivery mode

Available options:
CLOUD,
PHYSICAL,
DOWN
​
customer_type
enum<string>

Customer type if ID not provided

Available options:
B2C,
B2B,
PRISCH,
PRIEDUI,
GOV,
PUBSCH,
PUBEDU,
PRIHOS,
PUBHOS,
NGO
​
state
string

State/region

​
county
string

County/district

​
postal_code
string

Postal code

​
ip_address
string

IP address for geolocation

​
customer_name
string

Customer name (for validation match)

Response

Unified tax result and tax ID validation

​
taxability
boolean

Whether the product is taxable

​
country_rate
integer

Country-level tax rate (×1000)

​
state_rate
integer

State-level tax rate (×1000)

​
county_rate
integer

County-level tax rate (×1000)

​
additional_rate
integer

Any additional surcharge (×1000)

​
special_rate
integer

Special tax rate (×1000)

​
total_rate
integer

Final total rate (×1000)

​
reverse_charge_applicable
boolean

Is reverse charge applicable?

​
exempt
boolean

Is this transaction exempt from tax?

​
tax_id_valid
boolean

Whether the tax ID is valid

​
customer_name_registry
string

Name retrieved from tax registry

​
customer_name_match
boolean

Does the input name match registry?

​
customer_type
string
​
validated_country
string
​
validated_state
string
​
registry_address
string
​
validation_source
string

Source used for validation

​
validation_timestamp
string<date-time>
​
request_id
string

Internal ID for auditing and tracing