> ## Documentation Index > Fetch the complete documentation index at: https://docs.aiinsurance.io/llms.txt > Use this file to discover all available pages before exploring further. # Get Policy Version > Returns a specific version of a policy with all its derived segments. Each segment contains the full policy state (policy-level fields and nested exposures) for a contiguous date range. The `fullTermPolicyInfo` and `fullTermPolicyBilling` fields are extracted from the segments for convenience — these are full-term invariant fields that are identical across all segments in a version. **Required permission:** `company.policy:read` ## OpenAPI ````yaml /openapi/generated-external-api.yaml get /api/v1/external/companies/{companyId}/policies/{policyId}/versions/{version} openapi: 3.0.3 info: title: AI Insurance External API description: External API for AI Insurance platform version: 1.0.0 contact: email: support@aiinsurance.io servers: - url: https://app.aiinsurance.io description: Production security: - ApiKeyAuth: [] paths: /api/v1/external/companies/{companyId}/policies/{policyId}/versions/{version}: get: tags: - Field Model Policy Transactions summary: Get Policy Version description: > Returns a specific version of a policy with all its derived segments. Each segment contains the full policy state (policy-level fields and nested exposures) for a contiguous date range. The `fullTermPolicyInfo` and `fullTermPolicyBilling` fields are extracted from the segments for convenience — these are full-term invariant fields that are identical across all segments in a version. **Required permission:** `company.policy:read` operationId: getPolicyVersion parameters: - $ref: '#/components/parameters/companyId' - $ref: '#/components/parameters/policyIdPath' - $ref: '#/components/parameters/policyVersion' responses: '200': description: Policy version with segments content: application/json: schema: $ref: '#/components/schemas/PolicyTransactionVersionResponse' examples: success: summary: Policy version response value: policyId: 550e8400-e29b-41d4-a716-446655440001 policyVersion: 1 transactionId: 550e8400-e29b-41d4-a716-446655440002 startDate: '2025-01-01' endDate: '2026-01-01' createdAt: '2025-01-15T10:30:00.000Z' fullTermPolicyInfo: policyStatus: Active policyStartDate: year: 2025 month: 1 day: 1 timezone: America/New_York policyEndDate: year: 2026 month: 1 day: 1 timezone: America/New_York primaryInsuredId: 550e8400-e29b-41d4-a716-446655440010 fullTermPolicyBilling: policyPremium: 85000 policyTaxes: 0 policyFees: 500 policyGrandTotal: 85500 segments: - startDate: '2025-01-01' endDate: '2026-01-01' fieldModelV1Data: policy: annualPremium: 85000 fullTermPolicyInfo: policyStatus: Active policyStartDate: year: 2025 month: 1 day: 1 timezone: America/New_York policyEndDate: year: 2026 month: 1 day: 1 timezone: America/New_York primaryInsuredId: 550e8400-e29b-41d4-a716-446655440010 fullTermPolicyBilling: policyPremium: 85000 policyTaxes: 0 policyFees: 500 policyGrandTotal: 85500 exposures: - id: 550e8400-e29b-41d4-a716-446655440010 exposureType: MedicalFacility bedCount: 120 '400': description: Invalid version parameter content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: invalidVersion: summary: Version is not a valid integer value: error: code: VALIDATION_ERROR message: 'version: The value is not an integer' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': description: Policy or version not found content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: policyNotFound: summary: Policy does not exist value: error: code: NOT_FOUND message: Policy 550e8400-e29b-41d4-a716-446655440001 not found versionNotFound: summary: Version does not exist for this policy value: error: code: NOT_FOUND message: >- Policy 550e8400-e29b-41d4-a716-446655440001 version 5 not found '500': $ref: '#/components/responses/InternalServerError' components: parameters: companyId: name: companyId in: path required: true schema: type: string format: uuid description: Company identifier policyIdPath: name: policyId in: path required: true schema: type: string format: uuid description: Policy identifier policyVersion: name: version in: path required: true schema: type: integer minimum: 1 description: Policy version number (sequential, starting at 1) schemas: PolicyTransactionVersionResponse: type: object description: > Response returned by policy transaction endpoints. Contains the policy version produced by the transaction, including all derived segments. required: - policyId - policyVersion - transactionId - startDate - endDate - createdAt - segments properties: policyId: type: string format: uuid description: Policy identifier policyVersion: type: integer description: Sequential version number produced by this transaction transactionId: type: string format: uuid description: Identifier of the transaction that produced this version startDate: type: string format: date description: Policy term start date (ISO 8601) endDate: type: string format: date description: Policy term end date (ISO 8601) createdAt: type: string format: date-time description: When the transaction was created (ISO 8601) fullTermPolicyInfo: type: object nullable: true description: > Full-term policy information. Contains policy status, term dates, and primary insured reference. additionalProperties: true fullTermPolicyBilling: type: object nullable: true description: > Full-term billing aggregates. Contains premium, taxes, fees, and grand total for the full policy term. additionalProperties: true segments: type: array description: > Derived segments for this policy version. Each segment represents a maximal contiguous date range where policy state is identical. Adjacent segments with identical data are automatically merged. items: $ref: '#/components/schemas/PolicyTransactionSegmentResponse' ErrorResponse: type: object description: Standard error response for all external API endpoints required: - error properties: error: type: object required: - code - message properties: code: type: string description: Machine-readable error code example: VALIDATION_ERROR message: type: string description: Human-readable error message example: 'submissionId: Required field is missing' details: type: array description: Additional details for validation errors (field-level errors) items: type: object properties: field: type: string description: The field that caused the error example: submissionId message: type: string description: Description of the field error example: Required field is missing PolicyTransactionSegmentResponse: type: object description: > A derived policy segment representing a date range where policy state is identical. Contains the full policy data (policy-level fields and nested exposures) for this period. required: - startDate - endDate - fieldModelV1Data properties: startDate: type: string format: date description: Segment start date (ISO 8601) endDate: type: string format: date description: Segment end date (ISO 8601) fieldModelV1Data: type: object description: > Policy state for this segment. Contains a `policy` key with policy-level fields and a nested `exposures` array. properties: policy: type: object description: Policy-level fields and nested exposures for this segment. additionalProperties: true additionalProperties: true responses: Unauthorized: description: Unauthorized - Invalid or missing API key content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: missingApiKey: summary: Missing API key value: error: code: UNAUTHORIZED message: Authorization header is required bearerTokenNotAllowed: summary: Bearer token used instead of API key value: error: code: UNAUTHORIZED message: External API endpoints require API key authentication Forbidden: description: Forbidden - Insufficient permissions content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: insufficientPermissions: summary: Insufficient permissions value: error: code: FORBIDDEN message: Insufficient permissions to perform this action InternalServerError: description: Internal Server Error - Unexpected error occurred content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: internalError: summary: Unexpected server error value: error: code: INTERNAL_ERROR message: An unexpected error occurred. Please try again later. securitySchemes: ApiKeyAuth: type: apiKey in: header name: Authorization description: >- API key authentication. Include your API key in the Authorization header. ````