Cellulant Express Checkout API

openapi: 3.1.0
info:
  title: Cellulant Tingg Checkout Acknowledgement Express Checkout API
  description: 'Tingg Checkout 3.0 — accept payments across 25+ African markets through

    a single integration. Supports Express Checkout (hosted/modal) and Custom

    Checkout (host-to-host) for mobile money, cards, and direct bank transfer.

    '
  version: 3.0.0
  contact:
    name: Cellulant Developer Support
    url: https://developer.tingg.africa
    email: developer@cellulant.io
  license:
    name: Cellulant Terms of Service
    url: https://www.cellulant.io/terms
servers:
- url: https://api.tingg.africa
  description: Production
- url: https://api-approval.tingg.africa
  description: Sandbox
security:
- BearerAuth: []
  ApiKeyAuth: []
tags:
- name: Express Checkout
  description: Create hosted checkout sessions returning short and long URLs.
paths:
  /v3/checkout-api/checkout-request/express-request:
    post:
      summary: Create Express Checkout Request
      description: Create a hosted checkout session. The response includes both short_url and long_url that the merchant can present to the end-user (use short_url to avoid truncation in SMS or WhatsApp).
      operationId: createExpressCheckout
      tags:
      - Express Checkout
      parameters:
      - $ref: '#/components/parameters/ApiKey'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ExpressCheckoutRequest'
            examples:
              ExpressCheckoutRequestExample:
                $ref: '#/components/examples/ExpressCheckoutRequestExample'
      responses:
        '200':
          description: Checkout created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExpressCheckoutResponse'
              examples:
                ExpressCheckoutResponseExample:
                  $ref: '#/components/examples/ExpressCheckoutResponseExample'
        4XX:
          $ref: '#/components/responses/ErrorResponse'
components:
  schemas:
    ExpressCheckoutResponse:
      type: object
      properties:
        status_code:
          type: integer
        status_description:
          type: string
        checkout_request_id:
          type: string
        long_url:
          type: string
          format: uri
        short_url:
          type: string
          format: uri
    ExpressCheckoutRequest:
      type: object
      required:
      - merchant_transaction_id
      - service_code
      - country_code
      - currency_code
      - request_amount
      - callback_url
      properties:
        merchant_transaction_id:
          type: string
          description: Unique merchant transaction id.
        service_code:
          type: string
          description: Tingg service code identifying the merchant's product line.
        country_code:
          type: string
          description: ISO 3166-1 alpha-2 country code (KE, UG, TZ, NG, GH, ...).
        currency_code:
          type: string
          description: ISO 4217 currency code.
        request_amount:
          type: number
          format: double
        request_description:
          type: string
        account_number:
          type: string
        msisdn:
          type: string
          description: Customer phone in E.164 format.
        customer_first_name:
          type: string
        customer_last_name:
          type: string
        customer_email:
          type: string
          format: email
        due_date:
          type: string
          format: date-time
        callback_url:
          type: string
          format: uri
        success_redirect_url:
          type: string
          format: uri
        fail_redirect_url:
          type: string
          format: uri
        payment_option_code:
          type: string
        language_code:
          type: string
          example: en
    Error:
      type: object
      properties:
        status_code:
          type: integer
        status_description:
          type: string
        errors:
          type: array
          items:
            type: object
            properties:
              code:
                type: string
              message:
                type: string
  examples:
    ExpressCheckoutRequestExample:
      summary: Create express checkout for KES 1500
      value:
        merchant_transaction_id: MX-2026-05-24-0001
        service_code: TINGGSVC001
        country_code: KE
        currency_code: KES
        request_amount: 1500
        request_description: Order
        account_number: ACC-42
        msisdn: '254712345678'
        customer_first_name: Wanjiru
        customer_last_name: Mwangi
        customer_email: wanjiru@example.co.ke
        callback_url: https://merchant.example.co.ke/tingg/ipn
        success_redirect_url: https://merchant.example.co.ke/checkout/success
        fail_redirect_url: https://merchant.example.co.ke/checkout/failed
        language_code: en
    ExpressCheckoutResponseExample:
      summary: Express checkout created
      value:
        status_code: 200
        status_description: Successful
        checkout_request_id: '99887766'
        short_url: https://online.tingg.africa/checkout/Abc12
        long_url: https://online.tingg.africa/checkout/express?accessKey=abcdef1234567890...
  parameters:
    ApiKey:
      name: apikey
      in: header
      required: true
      description: Merchant API key issued in the Tingg integration dashboard.
      schema:
        type: string
  responses:
    ErrorResponse:
      description: Error response
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
    ApiKeyAuth:
      type: apiKey
      in: header
      name: apikey
      description: Merchant apiKey issued in the Tingg integration dashboard.