Justworks

Justworks Payroll API

Read payroll runs, fees, and paystubs. Each payroll record summarizes gross pay, net pay, employee and employer taxes, and debit information; paystubs break down per-member earnings, employee deductions, and employer contributions. Monetary fields are zero-decimal integers.

Justworks Payroll API is one of 7 APIs that Justworks publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 1 machine-runnable capability that can be deployed as REST, MCP, or Agent Skill surfaces via Naftiko and 2 JSON Schema definitions.

Tagged areas include Payroll, PEO, and Paystubs. The published artifact set on APIs.io includes API documentation, an OpenAPI specification, 1 Naftiko capability spec, and 2 JSON Schemas.

Documentation GitHub OpenAPI

OpenAPI Specification

openapi: 3.1.0
info:
  title: Justworks Payroll API
  description: |
    Read payroll runs, fees, and paystubs from the Justworks Partner API.
    Each payroll record summarizes a run's gross pay, net pay, taxes, and
    debit information; paystubs break down per-member earnings, employee
    deductions, and employer contributions.
  version: '2026-05-25'
  contact:
    name: Justworks Partner Support
    url: https://public-api.justworks.com/v1/docs

servers:
  - url: https://public-api.justworks.com
    description: Production Server

security:
  - OAuth2: []

tags:
  - name: Payrolls
    description: Read access to payroll runs and per-payroll fees
  - name: Paystubs
    description: Read access to per-member paystubs

paths:
  /v1/payrolls:
    get:
      summary: Justworks List Payrolls
      description: List payroll runs within a date range.
      operationId: listPayrolls
      tags:
        - Payrolls
      parameters:
        - name: start_date
          in: query
          required: true
          schema:
            type: string
            format: date
        - name: end_date
          in: query
          required: true
          schema:
            type: string
            format: date
        - $ref: '#/components/parameters/Cursor'
        - $ref: '#/components/parameters/Limit'
      responses:
        '200':
          description: A paginated list of payroll runs
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PayrollList'

  /v1/payrolls/{payroll_id}/fees:
    get:
      summary: Justworks List Payroll Fees
      description: List per-member fees applied to a payroll run.
      operationId: listPayrollFees
      tags:
        - Payrolls
      parameters:
        - $ref: '#/components/parameters/PayrollId'
        - $ref: '#/components/parameters/Cursor'
        - $ref: '#/components/parameters/Limit'
      responses:
        '200':
          description: A paginated list of payroll fees
          content:
            application/json:
              schema:
                type: object
                properties:
                  items:
                    type: array
                    items:
                      $ref: '#/components/schemas/PayrollFee'
                  next_cursor:
                    type: string
                    nullable: true

  /v1/payrolls/{payroll_id}/paystubs:
    get:
      summary: Justworks List Paystubs For Payroll
      description: List per-member paystub summaries for a payroll run.
      operationId: listPaystubsForPayroll
      tags:
        - Paystubs
      parameters:
        - $ref: '#/components/parameters/PayrollId'
        - $ref: '#/components/parameters/Cursor'
        - $ref: '#/components/parameters/Limit'
      responses:
        '200':
          description: A paginated list of paystub summaries
          content:
            application/json:
              schema:
                type: object
                properties:
                  items:
                    type: array
                    items:
                      $ref: '#/components/schemas/PaystubSummary'
                  next_cursor:
                    type: string
                    nullable: true

  /v1/paystubs/{paystub_id}:
    get:
      summary: Justworks Get Paystub
      description: Retrieve a single paystub including earnings, employee deductions, and employer contributions.
      operationId: getPaystub
      tags:
        - Paystubs
      parameters:
        - name: paystub_id
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: A paystub with detail
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Paystub'

components:
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://secure.justworks.com/oauth/authorize
          tokenUrl: https://public-api.justworks.com/oauth/token
          refreshUrl: https://public-api.justworks.com/oauth/token
          scopes:
            payroll:read: Read payroll runs and fees
            paystub:read: Read paystub detail

  parameters:
    PayrollId:
      name: payroll_id
      in: path
      required: true
      schema:
        type: string
    Cursor:
      name: cursor
      in: query
      schema:
        type: string
    Limit:
      name: limit
      in: query
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 100

  schemas:
    PayrollList:
      type: object
      properties:
        items:
          type: array
          items:
            $ref: '#/components/schemas/Payroll'
        next_cursor:
          type: string
          nullable: true

    Payroll:
      type: object
      description: |
        A payroll run. Monetary amounts use zero-decimal currency units —
        $45.00 is represented as the integer 4500.
      properties:
        id:
          type: string
        company_debit:
          type: integer
        employee_taxes:
          type: integer
        employer_taxes:
          type: integer
        gross_pay:
          type: integer
        net_pay:
          type: integer
        currency:
          type: string
        debit_date:
          type: string
          format: date
        pay_date:
          type: string
          format: date
        payment_method:
          type: string

    PayrollFee:
      type: object
      properties:
        member_id:
          type: string
        reference_id:
          type: string
        name:
          type: string
        reference_type:
          type: string
        type:
          type: string
        amount:
          type: integer
        currency:
          type: string

    PaystubSummary:
      type: object
      properties:
        member_id:
          type: string
        paystub_id:
          type: string
        gross_pay:
          type: integer
        net_pay:
          type: integer
        currency:
          type: string
        pay_date:
          type: string
          format: date
        pay_group:
          type: string
        pay_period_end:
          type: string
          format: date
        pay_period_start:
          type: string
          format: date

    Paystub:
      type: object
      properties:
        member_id:
          type: string
        paystub_id:
          type: string
        gross_pay:
          type: integer
        net_pay:
          type: integer
        currency:
          type: string
        pay_date:
          type: string
          format: date
        pay_group:
          type: string
        pay_period_end:
          type: string
          format: date
        pay_period_start:
          type: string
          format: date
        earnings:
          type: array
          items:
            $ref: '#/components/schemas/LineItem'
        employee_deductions:
          type: array
          items:
            $ref: '#/components/schemas/LineItem'
        employer_contributions:
          type: array
          items:
            $ref: '#/components/schemas/LineItem'

    LineItem:
      type: object
      properties:
        name:
          type: string
        type:
          type: string
        amount:
          type: integer
        category:
          type: string
        currency:
          type: string

Justworks Payroll API

Documentation

Specifications

Schemas & Data

Other Resources

OpenAPI Specification