Slash Transfers API

openapi: 3.1.0
info:
  title: Slash Public Account Transfers API
  description: API description
  version: 0.0.1
  contact: {}
servers:
- url: https://api.slash.com
  description: production
security:
- api_key: []
- partner_api_key: []
- bearer: []
- developer_application: []
tags:
- name: Transfers
paths:
  /transfers/book-transfer:
    x-reference-path: paths/transfers/book-transfer/route.yaml
    post:
      description: "Initiate a *book transfer* — an instant, intra‐Slash money movement\nbetween two accounts the caller has access to.\n\n`from` and `to` accept any Slash account id the caller can address:\n  - `sa_group_*` — a Slash account group's primary cash account\n  - `sub_*`      — a virtual account inside a Slash account group\n\nThe legal entity owning `from` must equal the request's `x-legal-entity`\nheader (the source-scope guard for user-scoped API keys), and the caller\nmust be a member of both `from` and `to`'s legal entities. Cross-legal-\nentity transfers between entities you own are supported; sending to a\nthird party is not (see closed-loop-payment, coming soon).\n\nPayment is settled instantly on Slash's ledger — no banking-network rail\nis touched. For ACH/wire/RTP, use the rail-specific endpoint.\n"
      parameters:
      - name: X-Idempotency-Key
        in: header
        required: true
        schema:
          type: string
        description: Unique key to ensure idempotency of the transfer.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                from:
                  type: string
                  description: The Slash account id to debit.
                to:
                  type: string
                  description: The Slash account id to credit.
                amountCents:
                  type: number
                  description: The amount of money to send in cents.
                memo:
                  type: string
                  description: Optional memo/description for the transfer to help differentiate transactions.
                  maxLength: 255
              required:
              - from
              - to
              - amountCents
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  transferId:
                    type: string
                    description: The ID of the transfer that was created.
                required:
                - transferId
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '409':
          description: 'The provided `X-Idempotency-Key` was already used for a different

            request body. Idempotency keys must be unique per request body —

            replaying a previous key with mismatched parameters is rejected.

            '
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
                x-entrypoint:
                  origin: ./src/publicApi
                  sourcePath: src/publicApi/paths/transfers/book-transfer/route.yaml
                  title: Error
                  virtualPath: components/Error
                  globalImport: true
        '429':
          description: TooManyRequests
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Internal Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
      - api_key: []
      - bearer: []
      tags:
      - Transfers
components:
  schemas:
    Error:
      type: object
      properties:
        message:
          type: string
        name:
          type: string
        identifier:
          type: string
        rawStatus:
          type: number
        meta:
          type: object
          additionalProperties: true
      required:
      - message
      - name
      - identifier
      - rawStatus
      x-entrypoint:
        origin: ./src/publicApi
        sourcePath: ./src/publicApi/main.yaml
        title: Error
        virtualPath: components/Error
      title: Error
  securitySchemes:
    api_key:
      type: apiKey
      description: "API key authentication for public API requests.\n\nKeys come in two flavors:\n\n- *Legal-entity-scoped keys* are pinned to a single legal entity.\n  Minted via the dashboard under a specific entity; every request\n  acts on that entity.\n- *User-scoped keys* are pinned to a user and span every legal\n  entity that user has access to. Every request made with a\n  user-scoped key (except `GET /legal-entity`, which lists the\n  legal entities the user can access) must include an\n  `x-legal-entity` header naming the legal entity the request is\n  operating on. Requests without the header are rejected with\n  `400`. The authenticated user must have an active permission\n  role on the supplied legal entity, otherwise the request is\n  rejected with `403`.\n"
      name: X-API-Key
      in: header
    partner_api_key:
      type: apiKey
      description: 'Partner-program API key authentication.


        Keys are minted in the partner dashboard (Developers → API Keys),

        are scoped to a single partner program, and are prefixed with

        `sk_partner_`. Partner keys are only accepted by routes that

        declare this scheme; they are rejected by `api_key` routes and

        vice versa.

        '
      name: X-API-Key
      in: header
    bearer:
      type: http
      scheme: bearer
    developer_application:
      type: http
      scheme: basic