Stax

Stax Surcharge API

The Surcharge API from Stax — 1 operation(s) for surcharge.

Documentation GitHub OpenAPI

Operations 1

GET /surcharge/review Review a Transaction's Surcharge Information #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: stax-api Surcharge API
  version: '0.1'
servers:
- url: https://apiprod.fattlabs.com/
security:
- ApiKeyAuth: []
tags:
- name: Surcharge
paths:
  /surcharge/review:
    get:
      summary: Review a Transaction's Surcharge Information
      description: ''
      operationId: review-a-transactions-surcharge-information
      parameters:
      - name: payment_method_id
        in: query
        description: Tokenized payment method id
        schema:
          type: string
        required: true
      - name: total
        in: query
        description: Transaction subtotal
        schema:
          type: string
      responses:
        '200':
          description: '200'
          content:
            application/json:
              examples:
                Result:
                  value: "{\n  \"bin_type\": \"CREDIT\",\n  \"surcharge_rate\": 1.5,\n  \"surcharge_amount\": 0.18,\n  \"total_with_surcharge_amount\": 12.18\n}"
              schema:
                type: object
                properties:
                  bin_type:
                    type: string
                    example: CREDIT
                  surcharge_rate:
                    type: number
                    example: 1.5
                    default: 0
                  surcharge_amount:
                    type: number
                    example: 0.18
                    default: 0
                  total_with_surcharge_amount:
                    type: number
                    example: 12.18
                    default: 0
      deprecated: false
      tags:
      - Surcharge
components:
  securitySchemes:
    ApiKeyAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: API key for merchant-level operations. Provides access to merchant-specific endpoints including transactions, payments, customer management, and merchant account settings. This key is scoped to a single merchant account and cannot access partner-level functionality.
    PartnerApiKey:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Partner-level API key with elevated privileges. Grants access to all partner operations including merchant management, portfolio oversight, reporting across multiple merchant accounts, and partner-specific administrative functions. Also provides access to all merchant-level operations for accounts under the partner's management.
    EphemeralAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Temporary authentication token with limited lifespan. Used for short-term access to specific operations, typically generated for secure one-time actions or time-bounded sessions. Automatically expires after a predefined period for enhanced security.