VAT Validation API

openapi: 3.0.3
info:
  title: Abstract API - VAT Validation API
  description: Validate VAT numbers, look up current VAT rates by country, and calculate VAT-inclusive or VAT-exclusive prices to stay compliant for domestic and cross-border sales.
  version: 1.0.0
  contact:
    url: https://www.abstractapi.com/
  x-generated-from: documentation
servers:
  - url: https://vat.abstractapi.com/v1
    description: VAT Validation API v1
security:
  - apiKey: []
tags:
  - name: VAT Validation
    description: VAT number validation and rate lookup
paths:
  /validate:
    get:
      operationId: validateVATNumber
      summary: Abstract API Validate VAT Number
      description: Validate a VAT number and retrieve company details associated with it.
      tags:
        - VAT Validation
      parameters:
        - name: api_key
          in: query
          required: true
          description: Your unique API key.
          schema:
            type: string
          example: abc123def456
        - name: vat_number
          in: query
          required: true
          description: The VAT number to validate (with country prefix).
          schema:
            type: string
          example: GB123456789
      responses:
        '200':
          description: VAT validation result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VATValidationResponse'
              examples:
                validateVATNumber200Example:
                  summary: Default validateVATNumber 200 response
                  x-microcks-default: true
                  value:
                    vat_number: GB123456789
                    valid: true
                    company:
                      name: Example Ltd
                      address: 1 Example Street, London, UK
                    country:
                      code: GB
                      name: United Kingdom
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /rates:
    get:
      operationId: getVATRates
      summary: Abstract API Get VAT Rates
      description: Look up the current VAT rates for a given country.
      tags:
        - VAT Validation
      parameters:
        - name: api_key
          in: query
          required: true
          description: Your unique API key.
          schema:
            type: string
          example: abc123def456
        - name: country_code
          in: query
          required: true
          description: ISO 3166-1 alpha-2 country code.
          schema:
            type: string
          example: DE
      responses:
        '200':
          description: VAT rates for the country
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VATRatesResponse'
              examples:
                getVATRates200Example:
                  summary: Default getVATRates 200 response
                  x-microcks-default: true
                  value:
                    country_code: DE
                    country_name: Germany
                    standard_rate: 19
                    reduced_rates:
                      - 7
                    super_reduced_rate: null
                    parking_rate: null
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /calculate:
    get:
      operationId: calculateVAT
      summary: Abstract API Calculate VAT
      description: Calculate VAT-inclusive or VAT-exclusive price for a given country and amount.
      tags:
        - VAT Validation
      parameters:
        - name: api_key
          in: query
          required: true
          description: Your unique API key.
          schema:
            type: string
          example: abc123def456
        - name: amount
          in: query
          required: true
          description: Amount to calculate VAT on.
          schema:
            type: number
          example: 100
        - name: country_code
          in: query
          required: true
          description: ISO 3166-1 alpha-2 country code.
          schema:
            type: string
          example: DE
        - name: is_vat_incl
          in: query
          required: false
          description: Whether the amount already includes VAT. Defaults to false.
          schema:
            type: boolean
          example: false
        - name: vat_category
          in: query
          required: false
          description: VAT rate category (standard, reduced, super_reduced, parking).
          schema:
            type: string
          example: standard
      responses:
        '200':
          description: VAT calculation result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/VATCalculateResponse'
              examples:
                calculateVAT200Example:
                  summary: Default calculateVAT 200 response
                  x-microcks-default: true
                  value:
                    amount_excl_vat: 100
                    vat_amount: 19
                    amount_incl_vat: 119
                    vat_category: standard
                    vat_rate: 19
                    country_code: DE
                    country_name: Germany
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: query
      name: api_key
  schemas:
    VATValidationResponse:
      type: object
      properties:
        vat_number:
          type: string
          description: The VAT number validated
          example: GB123456789
        valid:
          type: boolean
          description: Whether the VAT number is valid
          example: true
        company:
          type: object
          properties:
            name:
              type: string
              description: Company name associated with the VAT number
              example: Example Ltd
            address:
              type: string
              description: Company address
              example: 1 Example Street, London, UK
        country:
          type: object
          properties:
            code:
              type: string
              description: Country code
              example: GB
            name:
              type: string
              description: Country name
              example: United Kingdom
    VATRatesResponse:
      type: object
      properties:
        country_code:
          type: string
          example: DE
        country_name:
          type: string
          example: Germany
        standard_rate:
          type: number
          description: Standard VAT rate percentage
          example: 19
        reduced_rates:
          type: array
          items:
            type: number
          description: Reduced VAT rate percentages
          example:
            - 7
        super_reduced_rate:
          type: number
          nullable: true
          description: Super reduced VAT rate if applicable
          example: null
        parking_rate:
          type: number
          nullable: true
          description: Parking VAT rate if applicable
          example: null
    VATCalculateResponse:
      type: object
      properties:
        amount_excl_vat:
          type: number
          description: Amount excluding VAT
          example: 100
        vat_amount:
          type: number
          description: VAT amount
          example: 19
        amount_incl_vat:
          type: number
          description: Amount including VAT
          example: 119
        vat_category:
          type: string
          description: VAT category used
          example: standard
        vat_rate:
          type: number
          description: VAT rate applied
          example: 19
        country_code:
          type: string
          example: DE
        country_name:
          type: string
          example: Germany
    ErrorResponse:
      type: object
      properties:
        message:
          type: string
          example: The provided API key is invalid
        error:
          type: string
          example: invalid_api_key