Wompi Transactions API

openapi: 3.0.3
info:
  title: Wompi Merchants Transactions API
  description: Wompi is the payment gateway of Grupo Bancolombia, serving Colombia (COP). The REST API creates and tracks transactions across local payment methods - CARD, NEQUI (mobile wallet), PSE (Pagos Seguros en Linea / online bank debit), BANCOLOMBIA_TRANSFER (Boton Bancolombia), and BANCOLOMBIA_COLLECT - plus card and Nequi tokenization, reusable payment sources, and hosted payment links. Public-key endpoints are safe for the browser; private-key endpoints are server-side only.
  termsOfService: https://wompi.co/es/co/terminos-y-condiciones
  contact:
    name: Wompi Soporte
    url: https://docs.wompi.co
    email: soporte@wompi.co
  version: '1.0'
servers:
- url: https://production.wompi.co/v1
  description: Production
- url: https://sandbox.wompi.co/v1
  description: Sandbox (test keys pub_test_ / prv_test_)
tags:
- name: Transactions
  description: Create and track payment transactions.
paths:
  /transactions:
    post:
      operationId: createTransaction
      tags:
      - Transactions
      summary: Create a transaction
      description: Creates a payment transaction for a given amount_in_cents and currency (COP). The payment_method object varies by type - CARD, NEQUI, PSE, BANCOLOMBIA_TRANSFER, or BANCOLOMBIA_COLLECT. Requires an acceptance token and a signature (firma de integridad) computed from the integrity secret. New transactions start in PENDING.
      security:
      - PublicKey: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TransactionRequest'
      responses:
        '201':
          description: Transaction created (status PENDING).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionResponse'
        '422':
          description: Validation error.
  /transactions/{id}:
    get:
      operationId: getTransaction
      tags:
      - Transactions
      summary: Get a transaction
      description: Retrieves the current status of a transaction. Final status is one of APPROVED, DECLINED, VOIDED (card only), or ERROR.
      security:
      - PublicKey: []
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Transaction data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionResponse'
        '404':
          description: Transaction not found.
  /transactions/{id}/void:
    post:
      operationId: voidTransaction
      tags:
      - Transactions
      summary: Void a card transaction
      description: Voids/annuls an approved card transaction. Requires the PRIVATE key.
      security:
      - PrivateKey: []
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        '201':
          description: Void request accepted.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionResponse'
components:
  schemas:
    TransactionResponse:
      type: object
      properties:
        data:
          type: object
          properties:
            id:
              type: string
              example: 1234-1699999999-12345
            status:
              type: string
              enum:
              - PENDING
              - APPROVED
              - DECLINED
              - VOIDED
              - ERROR
            amount_in_cents:
              type: integer
            currency:
              type: string
              example: COP
            reference:
              type: string
            payment_method_type:
              type: string
              example: CARD
            status_message:
              type: string
            created_at:
              type: string
              format: date-time
    TransactionRequest:
      type: object
      required:
      - amount_in_cents
      - currency
      - customer_email
      - acceptance_token
      - reference
      - payment_method
      - signature
      properties:
        amount_in_cents:
          type: integer
          description: Amount in COP cents (integer). e.g. 4980000 = COP 49,800.
          example: 4980000
        currency:
          type: string
          example: COP
        customer_email:
          type: string
        reference:
          type: string
          description: Unique merchant-side reference for the payment.
        acceptance_token:
          type: string
        signature:
          type: string
          description: Integrity signature (firma de integridad) computed from reference+amount+currency+integrity_secret.
        payment_method:
          oneOf:
          - $ref: '#/components/schemas/PaymentMethodCard'
          - $ref: '#/components/schemas/PaymentMethodNequi'
          - $ref: '#/components/schemas/PaymentMethodPse'
        payment_source_id:
          type: integer
          description: Charge a stored payment source instead of a payment_method.
    PaymentMethodPse:
      type: object
      properties:
        type:
          type: string
          example: PSE
        user_type:
          type: integer
          description: 0 = natural person, 1 = legal entity.
        user_legal_id_type:
          type: string
          example: CC
        user_legal_id:
          type: string
        financial_institution_code:
          type: string
        payment_description:
          type: string
    PaymentMethodNequi:
      type: object
      properties:
        type:
          type: string
          example: NEQUI
        phone_number:
          type: string
    PaymentMethodCard:
      type: object
      properties:
        type:
          type: string
          example: CARD
        token:
          type: string
          example: tok_test_1234_abcd
        installments:
          type: integer
          example: 1
  securitySchemes:
    PublicKey:
      type: http
      scheme: bearer
      description: Bearer authorization with the merchant PUBLIC key (pub_prod_... / pub_test_...). Safe for client-side use; grants tokenization, merchant read, transaction create/read, and PSE catalog access.
    PrivateKey:
      type: http
      scheme: bearer
      description: Bearer authorization with the merchant PRIVATE key (prv_prod_... / prv_test_...). Server-side only; required for payment sources, voids, and payment links.