> ## Documentation Index > Fetch the complete documentation index at: https://docs.tread.ai/llms.txt > Use this file to discover all available pages before exploring further. # Retrieve Departments that belong to a Company > Retrieve `Department`s for a `Company`. ## OpenAPI ````yaml /api-reference/openapi.json get /v1/companies/{company-id}/departments openapi: 3.0.3 info: title: Horizon API V1 version: '1.0' contact: name: Tread url: https://tread.io email: developers@tread.io description: >- This is the Version 1 implementation. When in doubt we default to the practices outlined [here](https://www.vinaysahni.com/best-practices-for-a-pragmatic-restful-api#advanced-queries) license: name: Private url: https://tread.io servers: - description: production url: https://api.tread-horizon.com security: - bearerAuth: [] tags: - name: Projects - name: Orders - name: Loads - name: Jobs - name: JobAssignments - name: ApprovalAssignments - name: Equipment - name: FuelSurcharges - name: Materials - name: Accounts - name: Tickets - name: Users - name: Sites - name: Companies - name: Departments - name: Rates - name: Services - name: EquipmentType - name: FileAttachments - name: MaterialType - name: LineItemType - name: DriverStateEvent - name: Authentication - name: IamRoles - name: Typeaheads - name: Integrations - name: Reflection - name: LoadCycles - name: AddOns - name: ServiceClass - name: Invoices - name: JobSummaries - name: LoadSummaries - name: CompanyShares - name: UserDevicePermission - name: Drivers - name: Settlements - name: LocationHistories - name: Telematics - name: OmniReports - name: DriverDays - name: Agave - name: AddOnCharges - name: ResourceUsageLogs - name: ResourceScopes - name: TravelledDistances - name: MaterialRates - name: CompanyDayJobStats - name: KMLFiles - name: AutoAddOnAssignments - name: SiteRateSchedules - name: TwilioIntegrations - name: Foremen - name: AccountExternalTruckIdentifier - name: GeofenceTriggers - name: Labels - name: Compliance - name: ComplianceDocuments paths: /v1/companies/{company-id}/departments: parameters: - schema: type: string name: company-id in: path required: true description: Company ID - $ref: '#/components/parameters/Accept-Language' get: tags: - Departments summary: Retrieve Departments that belong to a Company description: Retrieve `Department`s for a `Company`. operationId: get-v1-companies-company-id-departments parameters: - $ref: '#/components/parameters/page-limit' - $ref: '#/components/parameters/page-after' - $ref: '#/components/parameters/page-before' responses: '200': description: OK headers: Link: schema: type: string description: Contains prev and next links for pagination content: application/json: schema: type: object properties: data: type: array x-stoplight: id: yzbiyswknpfly items: $ref: '#/components/schemas/Department-Read' required: - data '401': $ref: '#/components/responses/UnauthenticatedError' '404': $ref: '#/components/responses/Error' '406': $ref: '#/components/responses/Error' components: parameters: Accept-Language: name: Accept-Language in: header schema: type: string default: en example: en description: >- The Accept-Language request HTTP header indicates the natural language and locale that the client prefers. page-limit: name: page[limit] in: query schema: type: integer format: int32 default: 25 maximum: 100 description: The maximum number of paginated results to return page-after: name: page[after] in: query required: false schema: type: string description: The cursor to start paginating after page-before: name: page[before] in: query required: false schema: type: string description: The cursor to stop paginating at schemas: Department-Read: title: Department-Read x-stoplight: id: gbl1sm5vgmgsc allOf: - $ref: '#/components/schemas/Identifier' - type: object properties: name: type: string x-stoplight: id: q2t54kc2rvabe description: Department name company: $ref: '#/components/schemas/Company-Read-Nested' required: - name - company - $ref: '#/components/schemas/Timestamps' Identifier: title: Identifier x-stoplight: id: gnd39lue5v7ol type: object required: - id properties: id: type: string x-stoplight: id: 2e38hjk4zd58m format: uuid additionalProperties: false Company-Read-Nested: title: Company-Read-Nested x-stoplight: id: cb2kn77qmf1l7 description: Compact Company model for nested reads. allOf: - $ref: '#/components/schemas/Identifier' x-stoplight: id: jwsufva4znm91 - $ref: '#/components/schemas/TreadId' - type: object properties: legal_name: type: string x-stoplight: id: yc10t8hieecwk description: The Company's name. Must be globally unique. company_type: $ref: '#/components/schemas/CompanyType' required: - legal_name - company_type Timestamps: title: Timestamps x-stoplight: id: t82ecgfu0oj00 type: object required: - created_at - updated_at properties: created_at: type: string x-stoplight: id: gjj950jpq0ga9 format: date-time description: ISO8601 timestamp with local timezone updated_at: type: string x-stoplight: id: bwcuyfwc7aj0e format: date-time description: ISO8601 timestamp with local timezone additionalProperties: false UnauthenticatedError-Response: title: UnauthenticatedError-Response x-stoplight: id: o477eph7ttbzt type: object required: - error properties: error: $ref: '#/components/schemas/UnauthenticatedError' additionalProperties: false Error-Response: title: Error-Response x-stoplight: id: 52cydhphee3qe type: object required: - error properties: error: $ref: '#/components/schemas/Error' additionalProperties: false TreadId: title: TreadId x-stoplight: id: 43k4t5tl359m4 type: object required: - tread_id properties: tread_id: type: string x-stoplight: id: zi3ld7djflw6f pattern: ^[0-9A-F]{6}$ minLength: 6 maxLength: 6 example: ABC123 description: Tread ID additionalProperties: false CompanyType: title: CompanyType x-stoplight: id: dkzo7gjbtb1b3 enum: - broker - contractor - hauler - owner_operator - producer - super example: hauler description: Company Type UnauthenticatedError: title: UnauthenticatedError x-stoplight: id: 202o69l0fs40h allOf: - $ref: '#/components/schemas/Error' - type: object x-stoplight: id: tg10dt7s0l6bw properties: error_type: type: string x-stoplight: id: wvq8c0qsym4hz required: - error_type Error: title: Error x-stoplight: id: 3g57kkik3l464 type: object description: An Error. required: - code properties: code: type: string x-stoplight: id: 7o9x1t8v0bgfo additionalProperties: false responses: UnauthenticatedError: description: Example response content: application/json: schema: $ref: '#/components/schemas/UnauthenticatedError-Response' type: object Error: description: Error response content: application/json: schema: $ref: '#/components/schemas/Error-Response' type: object securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````