openapi: 3.0.3
info:
  title: bunq Public Attachment Request Inquiry API
  description: 'Grounded, representative subset of the bunq Public API. bunq is a European (Dutch) neobank; its REST API lets account holders and licensed third parties read accounts, initiate SEPA and other payments, send and respond to payment requests, manage cards, export statements, upload attachments, and subscribe to event callbacks.


    IMPORTANT - bunq uses an unusual multi-step handshake before any business call can be made. All request/response bodies in the bunq API are wrapped in a top-level `Response` (list) envelope, and most responses also return a server signature. This document models the handshake plus a representative slice of the resource surface; it is NOT the full bunq API, which exposes hundreds of endpoints. Path segments such as `{userID}` and `{monetaryAccountID}` are numeric IDs returned by earlier calls. This spec is authored by API Evangelist from the public documentation at https://doc.bunq.com and is not an official bunq artifact; request/response schemas are simplified and several are modeled rather than copied verbatim.'
  version: v1
  contact:
    name: bunq API documentation
    url: https://doc.bunq.com
  license:
    name: bunq API Terms of Service
    url: https://doc.bunq.com
servers:
- url: https://api.bunq.com/v1
  description: Production
- url: https://public-api.sandbox.bunq.com/v1
  description: Sandbox
security:
- sessionToken: []
tags:
- name: Request Inquiry
  description: Create and read payment requests (money you ask another party to pay).
paths:
  /user/{userID}/monetary-account/{monetaryAccountID}/request-inquiry:
    parameters:
    - $ref: '#/components/parameters/UserID'
    - $ref: '#/components/parameters/MonetaryAccountID'
    get:
      operationId: listRequestInquiries
      tags:
      - Request Inquiry
      summary: List request inquiries
      description: Lists the payment requests (RequestInquiry) sent from this monetary account.
      responses:
        '200':
          description: A list of request inquiries.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Response'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createRequestInquiry
      tags:
      - Request Inquiry
      summary: Create a request inquiry
      description: Sends a payment request to a counterparty alias (IBAN, email, or phone). The counterparty receives a RequestResponse they can accept or reject.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RequestInquiryInput'
      responses:
        '200':
          description: The created request inquiry.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Response'
        '400':
          $ref: '#/components/responses/Error'
  /user/{userID}/monetary-account/{monetaryAccountID}/request-response:
    parameters:
    - $ref: '#/components/parameters/UserID'
    - $ref: '#/components/parameters/MonetaryAccountID'
    get:
      operationId: listRequestResponses
      tags:
      - Request Inquiry
      summary: List request responses
      description: Lists incoming payment requests (RequestResponse) addressed to this monetary account.
      responses:
        '200':
          description: A list of request responses.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Response'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    Response:
      type: object
      description: Generic bunq response envelope. Every bunq response wraps its payload in a top-level `Response` array whose items are single-key objects keyed by the resource type (for example `Payment`, `MonetaryAccount`, `Id`, `Token`). Modeled generically here; see doc.bunq.com for the exact per-resource shape.
      properties:
        Response:
          type: array
          items:
            type: object
            additionalProperties: true
    RequestInquiryInput:
      type: object
      required:
      - amount_inquired
      - counterparty_alias
      - description
      - allow_bunqme
      properties:
        amount_inquired:
          $ref: '#/components/schemas/Amount'
        counterparty_alias:
          $ref: '#/components/schemas/Pointer'
        description:
          type: string
        allow_bunqme:
          type: boolean
          description: Whether the request may be paid via a bunq.me link.
    ErrorResponse:
      type: object
      description: bunq error envelope.
      properties:
        Error:
          type: array
          items:
            type: object
            properties:
              error_description:
                type: string
              error_description_translated:
                type: string
    Pointer:
      type: object
      description: A bunq alias ("pointer") identifying a counterparty.
      required:
      - type
      - value
      properties:
        type:
          type: string
          enum:
          - IBAN
          - EMAIL
          - PHONE_NUMBER
        value:
          type: string
        name:
          type: string
          description: Required when type is IBAN.
    Amount:
      type: object
      required:
      - value
      - currency
      properties:
        value:
          type: string
          description: Decimal amount as a string, for example "12.50".
        currency:
          type: string
          description: ISO 4217 currency code, for example EUR.
  responses:
    Unauthorized:
      description: Missing/invalid session token or signature.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Error:
      description: A bunq error response envelope.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  parameters:
    UserID:
      name: userID
      in: path
      required: true
      description: The numeric ID of the user.
      schema:
        type: integer
    MonetaryAccountID:
      name: monetaryAccountID
      in: path
      required: true
      description: The numeric ID of the monetary account.
      schema:
        type: integer
  securitySchemes:
    sessionToken:
      type: apiKey
      in: header
      name: X-Bunq-Client-Authentication
      description: Session token obtained from POST /session-server, sent on every business call. In addition, each request body must be signed with your private key and the signature sent in the X-Bunq-Client-Signature header (see the ClientSignature parameter). bunq is not a simple bearer-token API.
    installationToken:
      type: apiKey
      in: header
      name: X-Bunq-Client-Authentication
      description: Installation token from POST /installation, used only for the device-server and session-server handshake calls.