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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 in the Sandbox environment to simulate both tax rate calculation and tax ID validation in a single call. It is useful for validating your end-to-end integration during development for workflows such as checkout, invoice generation, or regulatory compliance.

​
Valid Tax ID Scenarios

The Sandbox supports specific Tax IDs for deterministic test cases. Use only the values listed below for expected behavior.

​
Tax Rate Simulation

These combinations return predictable tax calculations in the Sandbox.

​
Request Parameters

  • product_id: (string, optional) – Internal product identifier.
  • product_category: (string, optional) – Required if product_id is absent. Acceptable values include: CSS, DTSP, DAW, DAVW, DB, DP, IAAS, PAAS, SAAS, PRSFT, RNGT, DSWS, GMO, SSS, DTSS, INGMO
  • is_security: (boolean, optional) – Indicates if product is classified as a financial/security item.
  • delivery_method: (string, required) – One of: CLOUD, PHYSICAL, DOWN
  • customer_id: (string, optional) – Internal customer identifier.
  • customer_type: (string, optional) – Used if no customer_id is provided. One of: B2C, B2B, PRISCH, PRIEDUI, GOV, PUBSCH, PUBEDU, PRIHOS, PUBHOS, NGO
  • country: (string, required) – ISO country code.
  • state, county, postal_code, ip_address: (optional) – Additional location context.
  • tax_id: (string, required) – The tax identifier to validate.
  • customer_name: (string, optional) – Used for name matching with registry.

​
Response Fields

  • taxability: (boolean) – Whether the product is taxable.
  • country_rate, state_rate, county_rate, special_rate, additional_rate, total_rate: (integer) – Tax rates in basis points.
  • reverse_charge_applicable: (boolean) – Reverse charge status.
  • exempt: (boolean) – Whether tax is fully exempt.
  • tax_id_valid: (boolean) – Whether the ID is valid.
  • customer_name_registry: (string) – Name returned by registry.
  • customer_name_match: (boolean) – If provided name matches registry.
  • customer_type: (string) – Inferred customer type.
  • validated_country, validated_state: (string) – Jurisdictional confirmation.
  • registry_address: (string) – Registry’s address (if available).
  • validation_source: (string) – Validation source such as VIES, GSTN.
  • validation_timestamp: (string) – ISO timestamp of the validation.
  • request_id: (string) – Internal reference for debugging and audits.

​
Notes

All rate fields are returned in basis points. 18000 = 18%.
Only specific test combinations and IDs work in the Sandbox. Any other inputs may yield default or empty responses.
product_id takes precedence over product_category if both are present.
customer_id takes precedence over customer_type if both are present.
Reverse charge is computed automatically based on customer classification and location.
This unified endpoint is ideal for real-time compliance, especially in invoicing or payment workflows.

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

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