> ## Documentation Index > Fetch the complete documentation index at: https://docs.dev.gojinko.com/llms.txt > Use this file to discover all available pages before exploring further. # car-cancel-preview > Preview the cost of cancelling a car rental booking Quote what cancelling would cost right now: the fee in force and the refund it would leave. Nothing is cancelled. `fee_known: false` means the fee could not be established, render it as "we will confirm the fee", never as free cancellation. The returned `cancellation_id` is required by car\_cancel\_commit. Guest-authenticated: booking\_ref + last\_name; a wrong pair returns 404 rather than confirming the booking's existence. ## OpenAPI ````yaml api-reference/public-api.yaml POST /v1/car_cancel_preview openapi: 3.0.0 info: title: Jinko Public API version: 0.5.0 description: >- Curated public REST surface for Jinko. Authenticated with jnk_ API keys. See https://docs.gojinko.com for guides. ### Per-end-user attribution On booking calls you may send an optional `X-End-User-Id` request header to attribute the booking to one of your own end users (for per-end-user attribution and rate-limiting). The value is an **opaque, tenant-scoped** identifier that you choose — not a Jinko account id. Omit it to book as the tenant. WorkOS-shaped values (prefixed `user_` or `org_`) are rejected. servers: [] security: [] paths: /v1/car_cancel_preview: post: tags: - Cars summary: Preview the cost of cancelling a car rental booking description: >- Quote what cancelling would cost right now: the fee in force and the refund it would leave. Nothing is cancelled. `fee_known: false` means the fee could not be established — render it as "we will confirm the fee", never as free cancellation. The returned `cancellation_id` is required by car_cancel_commit. Guest-authenticated: booking_ref + last_name; a wrong pair returns 404 rather than confirming the booking's existence. requestBody: content: application/json: schema: $ref: '#/components/schemas/CarCancelPreviewRequest' responses: '200': description: Cancellation quote content: application/json: schema: $ref: '#/components/schemas/CarCancelPreviewResponse' '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: BAD_REQUEST message: Malformed JSON in request body. doc_url: https://docs.gojinko.com/concepts/errors '401': description: Authentication required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: AUTH_REQUIRED message: Invalid or expired API key. doc_url: https://docs.gojinko.com/api-reference/authentication '402': description: Payment required — organization balance exhausted content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: PAYMENT_REQUIRED message: >- Insufficient balance — this call costs $0.0150 and your organization has $0.0000 available. Top up at https://dashboard.gojinko.com/developers/billing/topup doc_url: https://docs.gojinko.com/concepts/errors '404': description: Unknown booking_ref + last_name pair. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: NOT_FOUND message: booking not found '409': description: The operation conflicts with the current state of the resource content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: CONFLICT message: an exchange is already in progress for this booking doc_url: https://docs.gojinko.com/concepts/errors '422': description: Validation error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: BAD_REQUEST message: >- origins: origins is required; trip_type: trip_type is required doc_url: https://docs.gojinko.com/concepts/errors '429': description: Rate limit or quota exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: RATE_LIMITED message: Rate limit or quota exceeded. doc_url: https://docs.gojinko.com/concepts/errors '502': description: The travel provider rejected the request, or an upstream call failed content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: UPSTREAM_REJECTED message: >- sabre-rest BargainFinderMaxRQ failed with status 400: 27131 - Number of connection locations exceeds maximum allowed doc_url: https://docs.gojinko.com/concepts/errors '503': description: No travel provider can serve the request right now headers: Retry-After: description: >- Seconds to wait before retrying, forwarded verbatim from the upstream service. Absent when the upstream named no interval. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: UPSTREAM_UNAVAILABLE message: >- All flight providers are temporarily unable to serve this search. Please retry later. Provider reasons: sabre-rest: provider temporarily closed; travelfusion: quota exhausted doc_url: https://docs.gojinko.com/concepts/errors '504': description: The travel provider did not answer in time content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: UPSTREAM_TIMEOUT message: sabre-rest BargainFinderMaxRQ timed out after 30s doc_url: https://docs.gojinko.com/concepts/errors security: - ApiKeyAuth: [] - BearerAuth: [] components: schemas: CarCancelPreviewRequest: type: object properties: booking_ref: type: string minLength: 1 description: Jinko booking reference from the confirmation email. example: JNK-8PT9VS last_name: type: string minLength: 1 description: Lead traveler's last name, exactly as on the booking. example: Carrard intent: $ref: '#/components/schemas/IntentInput' required: - booking_ref - last_name example: booking_ref: JNK-8PT9VS last_name: Carrard CarCancelPreviewResponse: type: object properties: cancellation_id: type: string description: >- Opaque reference of this preview ("ccl_…"). Pass to car_cancel_commit — it binds the commit to the fee quoted here. Treat as an opaque string; the format may evolve. example: ccl_2f7c9a4e8b1d4c6f9e3a5b7d1c2e4f6a cancellable: type: boolean example: true fee_known: type: boolean description: >- false means the fee could not be established — UNKNOWN, not free. Render as "we will confirm the fee". example: true fee_type: type: string example: cancellation fee: $ref: '#/components/schemas/CarAmount' paid: allOf: - $ref: '#/components/schemas/CarAmount' - description: What the customer originally paid. refund_amount: allOf: - $ref: '#/components/schemas/CarAmount' - description: >- paid minus fee. Absent whenever the fee is unknown — absent is not zero. currency: type: string example: EUR non_refundable: type: boolean ErrorResponse: type: object properties: error: type: object properties: code: type: string enum: - AUTH_REQUIRED - PAYMENT_REQUIRED - RATE_LIMITED - BAD_REQUEST - FORBIDDEN - NOT_FOUND - CONFLICT - PRICE_CHANGED - QUOTE_EXPIRED - TRIP_EXPIRED - TRIP_STATE_CONFLICT - OFFER_EXPIRED - OFFER_UNAVAILABLE - MISSING_CUSTOMER_DETAILS - CURRENCY_UNSUPPORTED - UPSTREAM_REJECTED - UPSTREAM_UNAVAILABLE - UPSTREAM_TIMEOUT - UPSTREAM_ERROR - INTERNAL description: >- What went wrong, as a stable machine-readable code. This is a closed set — branch on it rather than on `message`, which is prose and may change. Codes are only ever ADDED, in a minor version, so treat an unknown one as its HTTP status. example: BAD_REQUEST message: type: string doc_url: type: string required: - code - message required: - error IntentInput: type: object properties: user_intent: type: string nullable: true description: >- The user's natural-language intent: the Alpic PII-stripped paraphrase when available, else a best-effort fallback to the client-provided NL query. example: find a cheap flight to Tokyo CarAmount: type: object properties: value: type: integer description: >- Integer amount in MINOR units, always paired with decimal_places — divide by 10 ** decimal_places to display. Example: value 15977 with decimal_places 2 is 159.77 USD. Rendering this field directly shows prices 100x too high for 2-decimal currencies. example: 41250 currency: type: string description: ISO 4217 currency code. example: EUR decimal_places: type: integer description: >- Scale of the integer value/amount: display = integer / 10 ** decimal_places. Always sent alongside minor-unit amounts. Usually the ISO 4217 digits of the currency (2 for USD/EUR/GBP, 0 for JPY/KRW, 3 for BHD/JOD/KWD) but currency-converted prices can carry a different scale — ALWAYS use the decimal_places sent with the amount, never a hardcoded 2. Only if the field is genuinely absent on a value-shaped object, fall back to the ISO digits for the currency. example: 2 description: The only amount Jinko charges at checkout. securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key BearerAuth: type: http scheme: bearer ````