openapi: 3.1.0
info:
  title: Increase Account Numbers API
  description: Increase is a bank-grade payments and financial infrastructure platform that exposes a single REST API for moving and holding money in the United States. This document models the primary resources of the Increase API - Accounts, Account Numbers, Cards, Card Payments, ACH / Wire / Real-Time Payments / Check transfers, Transactions, Entities, Events and webhooks, Bookkeeping, Card Profiles and Digital Wallets, Lockboxes, and Simulations. It is grounded in Increase's public OpenAPI 3.1 spec (https://api.increase.com/openapi.json) and the Stainless-generated SDKs. Authentication is a Bearer API key. All endpoints are HTTPS REST; state changes are delivered as Events over HTTP webhooks (no WebSocket surface). Requests support idempotency via the `Idempotency-Key` header. This is a representative, not exhaustive, subset of the full API.
  version: 0.0.1
  contact:
    name: Increase
    url: https://increase.com
  license:
    name: Increase Documentation
    url: https://increase.com/documentation
servers:
- url: https://api.increase.com
  description: Production
- url: https://sandbox.increase.com
  description: Sandbox
security:
- bearerAuth: []
tags:
- name: Account Numbers
  description: Routing and account number pairs that can receive funds.
paths:
  /account_numbers:
    get:
      operationId: listAccountNumbers
      tags:
      - Account Numbers
      summary: List Account Numbers
      parameters:
      - $ref: '#/components/parameters/Cursor'
      - $ref: '#/components/parameters/Limit'
      responses:
        '200':
          description: A list of Account Numbers.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccountNumberList'
    post:
      operationId: createAccountNumber
      tags:
      - Account Numbers
      summary: Create an Account Number
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - account_id
              - name
              properties:
                account_id:
                  type: string
                name:
                  type: string
      responses:
        '200':
          description: The created Account Number.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccountNumber'
  /account_numbers/{account_number_id}:
    parameters:
    - name: account_number_id
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: retrieveAccountNumber
      tags:
      - Account Numbers
      summary: Retrieve an Account Number
      responses:
        '200':
          description: The Account Number.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccountNumber'
    patch:
      operationId: updateAccountNumber
      tags:
      - Account Numbers
      summary: Update an Account Number
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                name:
                  type: string
                status:
                  type: string
                  enum:
                  - active
                  - disabled
                  - canceled
      responses:
        '200':
          description: The updated Account Number.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccountNumber'
components:
  parameters:
    Limit:
      name: limit
      in: query
      required: false
      description: Number of results to return per page (1-100, default 100).
      schema:
        type: integer
        default: 100
        minimum: 1
        maximum: 100
    Cursor:
      name: cursor
      in: query
      required: false
      description: Return the page of results starting after this cursor.
      schema:
        type: string
  schemas:
    AccountNumber:
      type: object
      properties:
        id:
          type: string
        account_id:
          type: string
        account_number:
          type: string
        routing_number:
          type: string
        name:
          type: string
        status:
          type: string
          enum:
          - active
          - disabled
          - canceled
        type:
          type: string
          example: account_number
    AccountNumberList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/AccountNumber'
        next_cursor:
          type: string
          nullable: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Increase API key passed as `Authorization: Bearer YOUR_API_KEY`. Keys are environment-scoped (production vs sandbox). OAuth is also supported for platform / Increase-for-platforms integrations.'