Pricing and billing

API usage is paid with units. Units are purchased as packages in the dashboard; a package has a volume (number of units) and a validity period.

Method costs

Method	Cost, units
`CatalogsListGet`	0 (free)
`ModelsListGet2`	0 (free)
`VehicleParamsSet`	0 (free)
`VehicleModificationsGet`	0 (free)
`PartGroupsGet`	1
`PartsGet`	1
`VinFind`	1
`ApplicabilityCars`	1
`ApplicabilityNodes`	1
`MaintenanceParts`	1
`OrderCheck`	2
`OrderCheckResult`	0 (free)

Charging rules

Units are deducted only for successful responses (HTTP 200). Authorization failures and internal errors are not billed.
VIN deduplication: repeated requests with the same VIN under the same api_key within 24 hours are not charged again. This applies to VinFind and to subsequent chain methods called with the same VIN.
SSD deduplication: PartGroupsGet and PartsGet charge 1 unit per selection session (ssd). While you work within one paid ssd, repeated calls of these methods are free.

In practice this means: a full "VIN → groups → parts" chain costs 1 unit, and navigating the group tree and units within a single selection consumes no extra units.

When you run out of units

Once the unit balance is exhausted or the package expires, paid methods return HTTP 403 with {"error": "Client disabled. not enough money"}. Your current balance and usage statistics are available in the dashboard.