CloudWalk InfinitePay Checkout API

openapi: 3.2.0
info:
  title: InfinitePay Checkout API
  version: '2026-08-01'
  summary: Generate InfinitePay hosted checkout payment links and query their payment status.
  description: 'The InfinitePay Integrated Checkout ("Checkout Integrado") API, operated by CloudWalk Inc. It has two public operations: create a hosted checkout link for a basket of items, and check the payment status of a previously created link. Payment is completed on the InfinitePay-hosted checkout page (checkout.infinitepay.io); the merchant is identified by its InfiniteTag `handle` rather than by an API key. Amounts are always integers in Brazilian cents (R$ 10,00 = 1000). Supported capture methods are `credit_card` (up to 12 installments) and `pix`.


    PROVENANCE: this document was NOT published by CloudWalk. It is a faithful transcription of CloudWalk''s own live, public API reference at https://www.infinitepay.io/checkout-documentacao (fetched 2026-08-01), with every path, field name, type and example taken verbatim from that page. Both hosts were probed live on 2026-08-01 to confirm the routes exist (see x-evidence). No operation, field or response has been invented; where the published reference is silent (error catalogue, rate limits, sandbox) this spec is silent too.'
  contact:
    name: InfinitePay / CloudWalk partner integrations
    email: parcerias@cloudwalk.io
    url: https://www.infinitepay.io/desenvolvedores
  termsOfService: https://www.infinitepay.io/legal/termos-de-uso
servers:
- url: https://api.checkout.infinitepay.io
  description: Production checkout API host (the host named in the current published reference).
- url: https://api.infinitepay.io/invoices/public/checkout
  description: Legacy path-based host for the same two operations. Probed live 2026-08-01 and still answering (POST /links returned the same 400 handle-validation error).
tags:
- name: InfinitePay Checkout API
paths: {}
webhooks:
  paymentApproved:
    post:
      operationId: onPaymentApproved
      summary: Payment approved notification
      description: When a payment is approved InfinitePay POSTs this payload to the `webhook_url` supplied on the checkout link. The published reference asks the receiver to answer within about one second with 200 OK to acknowledge, or 400 Bad Request to have the notification retried.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PaymentApprovedEvent'
            examples:
              approved:
                value:
                  invoice_slug: abc123
                  amount: 1000
                  paid_amount: 1010
                  installments: 1
                  capture_method: credit_card
                  transaction_nsu: UUID
                  order_nsu: UUID-do-pedido
                  receipt_url: https://comprovante.com/123
                  items:
                  - quantity: 1
                    price: 1000
                    description: Produto de Exemplo
      responses:
        '200':
          description: Notification acknowledged.
        '400':
          description: Receiver reported a problem; InfinitePay retries delivery.
      tags:
      - InfinitePay Checkout API
components:
  schemas:
    Item:
      type: object
      required:
      - quantity
      - price
      - description
      properties:
        quantity:
          type: integer
          description: Quantity of the item.
          examples:
          - 1
        price:
          type: integer
          description: Unit price in Brazilian cents (R$ 10,00 = 1000).
          examples:
          - 1000
        description:
          type: string
          description: Item description shown on the checkout page.
          examples:
          - Produto de Exemplo
    PaymentApprovedEvent:
      type: object
      properties:
        invoice_slug:
          type: string
          examples:
          - abc123
        amount:
          type: integer
          description: Original amount in cents.
        paid_amount:
          type: integer
          description: Amount paid in cents.
        installments:
          type: integer
        capture_method:
          type: string
          enum:
          - credit_card
          - pix
        transaction_nsu:
          type: string
          description: Unique transaction identifier (UUID format).
        order_nsu:
          type: string
          description: The merchant order identifier supplied on the link.
        receipt_url:
          type: string
          format: uri
          description: Link to the payment receipt.
        items:
          type: array
          items:
            $ref: '#/components/schemas/Item'
x-evidence:
  fetched: '2026-08-01'
  transcribed_from: https://www.infinitepay.io/checkout-documentacao
  probes:
  - url: https://api.checkout.infinitepay.io/
    method: GET
    http_status: 200
    body: OK <timestamp>
  - url: https://api.checkout.infinitepay.io/links
    method: POST
    request: '{}'
    http_status: 400
    body: '{"success":false,"message":"param is missing or the value is empty or invalid: handle"}'
  - url: https://api.checkout.infinitepay.io/payment_check
    method: POST
    request: '{}'
    http_status: 404
    body: '{"success":false,"message":"Not found"}'
  - url: https://api.infinitepay.io/invoices/public/checkout/links
    method: POST
    request: '{}'
    http_status: 400
    body: '{"success":false,"message":"param is missing or the value is empty or invalid: handle"}'
  - url: https://api.checkout.infinitepay.io/openapi.json
    method: GET
    http_status: 404
    note: provider publishes no machine-readable spec at any probed path
  spec_search:
  - path: /openapi.json
    status: 404
  - path: /openapi.yaml
    status: 404
  - path: /swagger.json
    status: 404
  - path: /api-docs
    status: 401
  - path: /redoc
    status: 404