> ## Documentation Index > Fetch the complete documentation index at: https://docs.nmbr.co/llms.txt > Use this file to discover all available pages before exploring further. # Update a contractor ## OpenAPI ````yaml /spec/openapi.json put /contractors/{contractor} openapi: 3.0.0 info: title: Nmbr API description: API to interact with Nmbr Payroll version: 1.0.0 servers: - url: https://sandbox.nmbr.co/services/payroll security: - CompanyToken: [] tags: - name: Accounting Codes - name: Accounting Code Rules - name: Adjustments - name: Allowances - name: Allowance Line Items - name: Allowance Types - name: Async Tasks - name: Bank Accounts - name: Business Entities - name: Business Entity Verifications - name: Business Entity ROE Authorizations - name: Business Presets - name: Calculations - name: Companies - name: Contractors - name: Deductions - name: Deduction Line Items - name: Deduction Types - name: Earnings - name: Earning Line Items - name: Earning Types - name: Effective Tax Properties - name: Employees - name: Employee Benefits - name: Employee Benefit Line Items - name: Employee Benefit Types - name: Employer Benefits - name: Employer Benefit Line Items - name: Employer Benefit Types - name: Employer Statutory Withholding Line Items - name: Employer Statutory Withholding Types - name: Forms - name: Form Batches - name: Form Types - name: Holidays - name: Integrations - name: Journal Entries - name: Overtime Rates - name: Partners - name: Pay Rates - name: Pay Schedules - name: Pay Splits - name: Pay Stubs - name: Payments - name: Payrolls - name: Reimbursements - name: Reimbursement Line Items - name: Reimbursement Types - name: Remittance Accounts - name: Remittance Account Enrollments - name: Reports - name: Statutory Withholding Line Items - name: Statutory Withholding Types - name: Tags - name: Tag Groups - name: Tax Properties - name: Tax Property Templates - name: Tokens - name: Usage Records - name: Usage Summaries - name: Vacation Pay - name: Vacation Pay Settings - name: Webhooks - name: Work Assignments paths: /contractors/{contractor}: put: tags: - Contractors summary: Update a contractor operationId: contractors-update parameters: - name: contractor in: path schema: type: string required: true requestBody: content: application/json: schema: type: object properties: business_name: type: string description: >- The contractor's business or corporation name. `null` for individual contractors. nullable: true maxLength: 255 first_name: type: string description: >- The contractor's first name. `null` for corporation contractors. nullable: true maxLength: 50 last_name: type: string description: >- The contractor's last name. `null` for corporation contractors. nullable: true maxLength: 50 middle_initial: type: string description: >- The contractor's middle initial. `null` for corporation contractors. nullable: true maxLength: 1 email: type: string description: >- The contractor's email address, used for payroll communications. business_number: type: string description: >- The contractor's 15-character (BN15) Canada Revenue Agency (CRA) program account number, consisting of a 9-digit Business Number (BN), a 2-letter program identifier, and a 4-digit reference number. `null` for individual contractors. sin: type: string description: >- The contractor's Social Insurance Number (SIN). `null` for corporation contractors. external_ref: type: string maxLength: 255 preferred_locale: type: string description: >- The locale used for payroll communications sent to this contractor, such as Pay Stub emails. If not set, the Business Entity's locale is used. enum: - en - fr archived_at: type: string description: >- The date the contractor was archived. Archiving a contractor also archives all Work Assignments that are not already archived. Archived contractors do not appear in active listings. format: date example: business_name: Contractor Co first_name: John last_name: Smith email: john@smith.com external_ref: responses: '200': description: OK content: application/json: schema: type: object properties: id: type: string description: The unique identifier of the object in Nmbr. readOnly: true object: type: string description: The type of the object in Nmbr (`"contractor"`). readOnly: true data: $ref: '#/components/schemas/Contractor' example: id: object: contractor data: business_name: Contractor Co first_name: John last_name: Smith middle_initial: null email: john@smith.com business_number: null sin_last_3: null external_ref: preferred_locale: null archived_at: null created_at: '2026-01-01T00:00:00.000000Z' updated_at: '2026-01-01T00:00:00.000000Z' links: self: /contractors/ components: schemas: Contractor: type: object title: Contractor properties: business_name: type: string description: >- The contractor's business or corporation name. `null` for individual contractors. nullable: true maxLength: 255 first_name: type: string description: The contractor's first name. `null` for corporation contractors. nullable: true maxLength: 50 last_name: type: string description: The contractor's last name. `null` for corporation contractors. nullable: true maxLength: 50 middle_initial: type: string description: The contractor's middle initial. `null` for corporation contractors. nullable: true maxLength: 1 email: type: string description: The contractor's email address, used for payroll communications. nullable: true maxLength: 255 business_number: type: string description: >- The contractor's 15-character (BN15) Canada Revenue Agency (CRA) program account number, consisting of a 9-digit Business Number (BN), a 2-letter program identifier, and a 4-digit reference number. `null` for individual contractors. nullable: true maxLength: 15 sin_last_3: description: >- The last 3 digits of the contractor's Social Insurance Number (SIN). `null` if no SIN has been provided. external_ref: type: string description: >- A reference to the object in an external system, e.g. the primary key of the object in your application's database. Nmbr doesn't use, validate, parse, or require this value to be unique - it simply stores it for your reference. nullable: true maxLength: 255 preferred_locale: type: string description: >- The locale used for payroll communications sent to this contractor, such as Pay Stub emails. If not set, the Business Entity's locale is used. nullable: true enum: - en - fr archived_at: type: string description: >- The date the contractor was archived. Archiving a contractor also archives all Work Assignments that are not already archived. Archived contractors do not appear in active listings. readOnly: true nullable: true format: dateTime created_at: type: string description: The date and time the object was created in Nmbr. readOnly: true format: dateTime updated_at: type: string description: The date and time the object was last updated in Nmbr. readOnly: true format: dateTime securitySchemes: CompanyToken: type: http scheme: bearer ````