Salsa Onboarding & Sessions API

openapi: 3.0.1
info:
  title: Salsa Payroll API
  description: >-
    Representative OpenAPI description of the Salsa embedded payroll REST API.
    Salsa is partner-gated payroll infrastructure - approved platform partners
    receive separate sandbox and production Bearer API keys and use these
    endpoints to provision employers and workers, run payroll, disburse worker
    payments, configure tax, and manage webhooks for US and Canada. This is a
    faithful, representative subset of the surface documented at
    https://docs.salsa.dev/reference and is not the vendor's official machine
    specification.
  termsOfService: https://www.salsa.dev/legal
  contact:
    name: Salsa Support
    url: https://docs.salsa.dev/
  version: rest-v1
servers:
  - url: https://api.salsa.dev/api/rest/v1
    description: Production (partner production API key)
  - url: https://api.sandbox.salsa.dev/api/rest/v1
    description: Sandbox (partner sandbox API key)
security:
  - bearerAuth: []
tags:
  - name: Companies
    description: Employer (company) entities and configuration.
  - name: Workers
    description: Employees and contractors.
  - name: Pay Schedules
    description: Worker pay groups and work weeks.
  - name: Payrolls
    description: Payroll runs and reports.
  - name: Payments
    description: Individual worker payments and disbursements.
  - name: Onboarding & Sessions
    description: User tokens, hosted onboarding, and mock onboarding.
  - name: Tax
    description: Employer and worker tax setup.
  - name: Webhooks
    description: Webhook endpoint management.
paths:
  /employers:
    post:
      operationId: createEmployer
      tags: [Companies]
      summary: Create an employer (company).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EmployerCreate'
      responses:
        '201':
          description: Employer created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Employer'
    get:
      operationId: listEmployers
      tags: [Companies]
      summary: Retrieve employers.
      responses:
        '200':
          description: A list of employers.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Employer'
  /employers/{employerId}:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: getEmployer
      tags: [Companies]
      summary: Retrieve an employer.
      responses:
        '200':
          description: The employer.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Employer'
    patch:
      operationId: updateEmployer
      tags: [Companies]
      summary: Update an employer.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/EmployerCreate'
      responses:
        '200':
          description: The updated employer.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Employer'
    delete:
      operationId: deleteEmployer
      tags: [Companies]
      summary: Delete an employer.
      responses:
        '204':
          description: Deleted.
  /employers/{employerId}/pay-types:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: listPayTypes
      tags: [Companies]
      summary: List an employer's pay types.
      responses:
        '200':
          description: A list of pay types.
    post:
      operationId: createPayType
      tags: [Companies]
      summary: Create a pay type for an employer.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Pay type created.
  /employers/{employerId}/bank-accounts:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: listEmployerBankAccounts
      tags: [Companies]
      summary: List an employer's bank accounts.
      responses:
        '200':
          description: A list of bank accounts.
    post:
      operationId: createEmployerBankAccount
      tags: [Companies]
      summary: Create a bank account for an employer.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Bank account created.
  /employers/{employerId}/workers:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    post:
      operationId: createWorker
      tags: [Workers]
      summary: Create a worker.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WorkerCreate'
      responses:
        '201':
          description: Worker created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Worker'
    get:
      operationId: listWorkers
      tags: [Workers]
      summary: Retrieve an employer's workers.
      responses:
        '200':
          description: A list of workers.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Worker'
  /employers/{employerId}/workers/{workerId}:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
    get:
      operationId: getWorker
      tags: [Workers]
      summary: Retrieve a worker.
      responses:
        '200':
          description: The worker.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Worker'
    patch:
      operationId: updateWorker
      tags: [Workers]
      summary: Update a worker.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WorkerCreate'
      responses:
        '200':
          description: The updated worker.
    delete:
      operationId: deleteWorker
      tags: [Workers]
      summary: Delete a worker.
      responses:
        '204':
          description: Deleted.
  /employers/{employerId}/workers/{workerId}/contracts:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
    get:
      operationId: listWorkerContracts
      tags: [Workers]
      summary: List a worker's contracts.
      responses:
        '200':
          description: A list of contracts.
    post:
      operationId: createWorkerContract
      tags: [Workers]
      summary: Create a worker contract (W-2 employee or 1099 contractor terms).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Contract created.
  /employers/{employerId}/workers/{workerId}/bank-accounts:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
    get:
      operationId: listWorkerBankAccounts
      tags: [Workers]
      summary: List a worker's bank accounts.
      responses:
        '200':
          description: A list of bank accounts.
    post:
      operationId: createWorkerBankAccount
      tags: [Workers]
      summary: Create a bank account for a worker.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Bank account created.
  /employers/{employerId}/worker-pay-groups:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: listWorkerPayGroups
      tags: [Pay Schedules]
      summary: List an employer's worker pay groups (pay schedules).
      responses:
        '200':
          description: A list of pay groups.
    post:
      operationId: createWorkerPayGroup
      tags: [Pay Schedules]
      summary: Create a worker pay group defining pay frequency and cadence.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Pay group created.
  /employers/{employerId}/work-weeks:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: listWorkWeeks
      tags: [Pay Schedules]
      summary: List an employer's work weeks.
      responses:
        '200':
          description: A list of work weeks.
    post:
      operationId: createWorkWeek
      tags: [Pay Schedules]
      summary: Create a work week for an employer.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Work week created.
  /employers/{employerId}/payroll-runs:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    post:
      operationId: createPayrollRun
      tags: [Payrolls]
      summary: Create a payroll run.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PayrollRunCreate'
      responses:
        '201':
          description: Payroll run created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PayrollRun'
    get:
      operationId: listPayrollRuns
      tags: [Payrolls]
      summary: Retrieve payroll runs.
      responses:
        '200':
          description: A list of payroll runs.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/PayrollRun'
  /employers/{employerId}/payroll-runs/{payrollRunId}:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/PayrollRunId'
    get:
      operationId: getPayrollRun
      tags: [Payrolls]
      summary: Retrieve a payroll run.
      responses:
        '200':
          description: The payroll run.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PayrollRun'
    delete:
      operationId: deletePayrollRun
      tags: [Payrolls]
      summary: Delete a payroll run.
      responses:
        '204':
          description: Deleted.
  /employers/{employerId}/payroll-runs/{payrollRunId}/preview:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/PayrollRunId'
    post:
      operationId: previewPayrollRun
      tags: [Payrolls]
      summary: Preview a payroll run (calculated gross-to-net before confirmation).
      responses:
        '200':
          description: Payroll run preview.
  /employers/{employerId}/payroll-runs/{payrollRunId}/confirm:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/PayrollRunId'
    post:
      operationId: confirmPayrollRun
      tags: [Payrolls]
      summary: Confirm a payroll run and initiate funding and disbursement.
      responses:
        '200':
          description: Payroll run confirmed.
  /employers/{employerId}/reports/payroll-journal:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: getPayrollJournalReport
      tags: [Payrolls]
      summary: Retrieve the payroll journal report.
      responses:
        '200':
          description: The payroll journal report.
  /employers/{employerId}/workers/{workerId}/payments:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
    post:
      operationId: createWorkerPayment
      tags: [Payments]
      summary: Create a worker payment.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Worker payment created.
    get:
      operationId: listWorkerPayments
      tags: [Payments]
      summary: Retrieve a worker's payments.
      responses:
        '200':
          description: A list of worker payments.
  /employers/{employerId}/workers/{workerId}/payments/{paymentId}/confirm:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
      - name: paymentId
        in: path
        required: true
        schema:
          type: string
    post:
      operationId: confirmWorkerPayment
      tags: [Payments]
      summary: Confirm a worker payment for disbursement.
      responses:
        '200':
          description: Payment confirmed.
  /employers/{employerId}/workers/{workerId}/payments/{paymentId}/deductions:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
      - $ref: '#/components/parameters/WorkerId'
      - name: paymentId
        in: path
        required: true
        schema:
          type: string
    post:
      operationId: createPaymentDeduction
      tags: [Payments]
      summary: Add a deduction to a worker payment.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '201':
          description: Deduction created.
  /user-tokens:
    post:
      operationId: createUserToken
      tags: [Onboarding & Sessions]
      summary: Create a scoped user API token (e.g. EMPLOYER_ADMIN) for the embeddable UI.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UserTokenCreate'
      responses:
        '201':
          description: A user token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UserToken'
  /employers/{employerId}/hosted-onboardings:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    post:
      operationId: createHostedEmployerOnboarding
      tags: [Onboarding & Sessions]
      summary: Create a hosted onboarding flow for an employer.
      responses:
        '201':
          description: Hosted onboarding created.
  /employers/{employerId}/mock-onboard:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    post:
      operationId: mockOnboardEmployer
      tags: [Onboarding & Sessions]
      summary: Simulate employer onboarding (sandbox only).
      responses:
        '200':
          description: Employer mock-onboarded.
  /employers/{employerId}/workers/mock-onboard:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    post:
      operationId: mockOnboardWorker
      tags: [Onboarding & Sessions]
      summary: Simulate worker onboarding (sandbox only).
      responses:
        '200':
          description: Worker mock-onboarded.
  /employers/{employerId}/taxes-setup:
    parameters:
      - $ref: '#/components/parameters/EmployerId'
    get:
      operationId: getEmployerTaxSetup
      tags: [Tax]
      summary: Retrieve an employer's tax setup and withholding configuration.
      responses:
        '200':
          description: Employer tax setup.
  /webhook-endpoints:
    post:
      operationId: createWebhookEndpoint
      tags: [Webhooks]
      summary: Register a webhook endpoint.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WebhookEndpointCreate'
      responses:
        '201':
          description: Webhook endpoint created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/WebhookEndpoint'
    get:
      operationId: listWebhookEndpoints
      tags: [Webhooks]
      summary: Retrieve all webhook endpoints.
      responses:
        '200':
          description: A list of webhook endpoints.
  /webhook-endpoints/{webhookEndpointId}:
    parameters:
      - name: webhookEndpointId
        in: path
        required: true
        schema:
          type: string
    get:
      operationId: getWebhookEndpoint
      tags: [Webhooks]
      summary: Retrieve a webhook endpoint.
      responses:
        '200':
          description: The webhook endpoint.
    patch:
      operationId: updateWebhookEndpoint
      tags: [Webhooks]
      summary: Update a webhook endpoint.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/WebhookEndpointCreate'
      responses:
        '200':
          description: The updated webhook endpoint.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Partner Bearer API key. Approved Salsa platform partners receive
        separate sandbox and production keys. Send as
        `Authorization: Bearer ${YOUR_API_TOKEN}`.
  parameters:
    EmployerId:
      name: employerId
      in: path
      required: true
      description: The employer (company) identifier.
      schema:
        type: string
    WorkerId:
      name: workerId
      in: path
      required: true
      description: The worker identifier.
      schema:
        type: string
    PayrollRunId:
      name: payrollRunId
      in: path
      required: true
      description: The payroll run identifier.
      schema:
        type: string
  schemas:
    Employer:
      type: object
      properties:
        id:
          type: string
        businessName:
          type: string
        country:
          type: string
          enum: [US, CA]
        onboardingStatus:
          type: string
        createdAt:
          type: string
          format: date-time
    EmployerCreate:
      type: object
      required: [businessName, country]
      properties:
        businessName:
          type: string
        country:
          type: string
          enum: [US, CA]
        address:
          type: object
        ein:
          type: string
          description: US Employer Identification Number (or CA business number).
    Worker:
      type: object
      properties:
        id:
          type: string
        employerId:
          type: string
        firstName:
          type: string
        lastName:
          type: string
        workerType:
          type: string
          enum: [EMPLOYEE, CONTRACTOR]
        onboardingStatus:
          type: string
    WorkerCreate:
      type: object
      required: [firstName, lastName, workerType]
      properties:
        firstName:
          type: string
        lastName:
          type: string
        email:
          type: string
          format: email
        workerType:
          type: string
          enum: [EMPLOYEE, CONTRACTOR]
    PayrollRun:
      type: object
      properties:
        id:
          type: string
        employerId:
          type: string
        workerPayGroupId:
          type: string
        payPeriodStart:
          type: string
          format: date
        payPeriodEnd:
          type: string
          format: date
        payDate:
          type: string
          format: date
        status:
          type: string
    PayrollRunCreate:
      type: object
      required: [workerPayGroupId, payPeriodStart, payPeriodEnd, payDate]
      properties:
        workerPayGroupId:
          type: string
        payPeriodStart:
          type: string
          format: date
        payPeriodEnd:
          type: string
          format: date
        payDate:
          type: string
          format: date
    UserTokenCreate:
      type: object
      required: [employerId, role]
      properties:
        employerId:
          type: string
        role:
          type: string
          enum: [EMPLOYER_ADMIN, WORKER]
    UserToken:
      type: object
      properties:
        token:
          type: string
        role:
          type: string
        expiresAt:
          type: string
          format: date-time
    WebhookEndpointCreate:
      type: object
      required: [url]
      properties:
        url:
          type: string
          format: uri
        eventTypes:
          type: array
          items:
            type: string
          example:
            - Employer.created
            - Worker.created
            - PayrollRun.statusChanged
            - Transmission.completed
    WebhookEndpoint:
      type: object
      properties:
        id:
          type: string
        url:
          type: string
          format: uri
        eventTypes:
          type: array
          items:
            type: string
        secret:
          type: string
          description: Signing secret used to verify webhook payloads.