---
title: Levam OEM API — Overview
description: REST API for original (OEM) auto parts catalogs — VIN decoding, vehicle selection, part diagrams, applicability lookups.
---

# Levam OEM API

Levam OEM API is a REST API for original (OEM) auto parts catalogs. The API provides:

- the list of OEM catalogs (brands) and vehicle models;
- vehicle identification by VIN or by parameters (family, model, year, market, etc.);
- unit groups, parts, and diagrams with part coordinates;
- part applicability (which vehicles and units contain a given part number);
- order validation (do part numbers fit a VIN) and maintenance parts.

## Base URL

```
https://api.levam.net
```

All methods are called with **GET** requests to paths of the form `/oem/v1/{Method}` and return JSON (UTF-8).

## Quick start

```bash
curl "https://api.levam.net/oem/v1/CatalogsListGet?api_key=YOUR_KEY"
```

The API key is issued in your [dashboard](https://levam.net/cabinet) after registration. See [Authentication](/docs/en/authentication).

## Conventions

- `api_key` — required in every method.
- `lang` — optional response language (e.g. `en`, `de`, `ru`). If data is unavailable in the requested language, English is returned. Defaults to `en`.
- `ssd` (Server Side Data) — vehicle-selection session identifier. Returned by vehicle selection methods; pass it to the next method in the chain. See [vehicle selection](/docs/en/vehicle-selection).
- Every successful response contains an `error` field; an empty string means no error. See [Error codes](/docs/en/errors).

## Typical call chain

1. [`CatalogsListGet`](/docs/en/catalogs) — the list of catalogs (brands).
2. [`ModelsListGet2`](/docs/en/catalogs) — families and models of a catalog, **or** [`VinFind`](/docs/en/vin-search) — straight from a VIN.
3. [`VehicleParamsSet`](/docs/en/vehicle-selection) → [`VehicleModificationsGet`](/docs/en/vehicle-selection) — narrow down the modification.
4. [`PartGroupsGet`](/docs/en/parts) — unit group tree, then [`PartsGet`](/docs/en/parts) — parts and the unit diagram.
5. Also: [part applicability](/docs/en/applicability), [order check](/docs/en/order-check), [maintenance parts](/docs/en/maintenance).

## Documentation sections

- [Authentication](/docs/en/authentication)
- [Pricing and billing](/docs/en/billing)
- [Catalogs and models](/docs/en/catalogs)
- [Vehicle selection by parameters](/docs/en/vehicle-selection)
- [VIN search](/docs/en/vin-search)
- [Unit groups and parts](/docs/en/parts)
- [Part applicability](/docs/en/applicability)
- [Order check](/docs/en/order-check)
- [Maintenance parts](/docs/en/maintenance)
- [Error codes](/docs/en/errors)

Every page is also available as raw Markdown — append `.md` to the URL (e.g. `/docs/en/authentication.md`). Full link list for LLM agents: [/llms.txt](/llms.txt), all content in one file: [/llms-full.txt](/llms-full.txt).