> ## 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-exchange-status > Check the status of a car rental exchange Report the latest exchange attempt for the booking, whatever state it reached, `preview`, `awaiting_payment`, `processing`, `confirmed`, `rejected`, `failed`, including `refund_pending_review`, where the booking is exchanged but the refund of the difference awaits a human. Read-only, from Jinko's own record; the provider is not re-polled. A 404 means either an unknown booking\_ref + last\_name pair or that no exchange attempt exists yet for this booking, run car\_exchange\_preview first. ## OpenAPI ````yaml api-reference/public-api.yaml POST /v1/car_exchange_status 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_exchange_status: post: tags: - Cars summary: Check the status of a car rental exchange description: >- Report the latest exchange attempt for the booking, whatever state it reached — `preview`, `awaiting_payment`, `processing`, `confirmed`, `rejected`, `failed` — including `refund_pending_review`, where the booking is exchanged but the refund of the difference awaits a human. Read-only, from Jinko's own record; the provider is not re-polled. A 404 means either an unknown booking_ref + last_name pair or that no exchange attempt exists yet for this booking — run car_exchange_preview first. requestBody: content: application/json: schema: $ref: '#/components/schemas/CarExchangeStatusRequest' responses: '200': description: Latest exchange state content: application/json: schema: $ref: '#/components/schemas/CarExchangeStatusResponse' '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, or no exchange attempt exists yet for this booking. 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: CarExchangeStatusRequest: 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 CarExchangeStatusResponse: type: object properties: exchange_id: type: string example: exc_7c1e4b9a2d8f4e6b9a3c5d7e1f2a4b6c state: type: string description: >- One of `preview` (previewed, nothing committed), `awaiting_payment`, `processing`, `confirmed`, `rejected`, `failed`. example: confirmed delta: $ref: '#/components/schemas/CarExchangeDelta' new_total: allOf: - $ref: '#/components/schemas/CarAmount' - description: The replacement rental's pay-now total. paid: allOf: - $ref: '#/components/schemas/CarAmount' - description: What the customer had paid before the exchange. refund_pending_review: type: boolean description: >- true means the booking IS exchanged but the refund of the difference needs manual review before it is issued. stripe_refund_id: type: string rejected_reason: type: string description: >- Why the provider declined the exchange. The booking stands as it was. completed_at: type: string description: RFC 3339, set once the attempt is terminal. example: '2026-09-02T15:18:00Z' 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 CarExchangeDelta: type: object properties: direction: type: string description: >- Which way money moves: `add_collect` — the replacement costs more and the difference is collected; `refund` — it costs less and the difference is refunded; `even` — same price. example: add_collect amount: allOf: - $ref: '#/components/schemas/CarAmount' - description: The ABSOLUTE difference. Absent when `direction` is `even`. description: >- The price difference between a candidate and what was already paid, and which way the money moves. Compared against `paid` on the preview, never against the candidate total. 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 ````