> ## Documentation Index
> Fetch the complete documentation index at: https://smartcar.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Compatibility API overview

> Vehicle compatibility data by make, model, region, and powertrain, updated daily from the Smartcar platform.

The Compatibility API tells you which signals and commands each vehicle supports. The data comes from real connections on the Smartcar platform and updates daily.

## Base URL

```
https://compatibility.api.smartcar.com/v3/compatible-vehicles
```

## Quick reference

* **No authentication required.** The endpoint is public — no credentials or headers needed.
* **Filter with JSON:API bracket syntax:** `?filter[make]=TESLA`, `?filter[region]=US`, `?filter[powertrainType]=PHEV`. Flat parameters (e.g. `?make=TESLA`) are silently ignored.
* **Returns the full matched dataset in a single response.** Pagination parameters are not honored — cache results locally and refresh daily.

See [Compatible Vehicles](/api-reference/compatible-vehicles) for the full parameter list, response schema, and examples.

## Browse on the web

If you'd rather not hit the API, you can browse the full dataset and download it as a CSV:

<Card title="Compatible Vehicles on smartcar.com" icon="globe" href="https://smartcar.com/product/compatible-vehicles">
  Filter by make or region and export the full compatibility matrix.
</Card>

If you need the previous Compatibility Matrix experience, use the [legacy matrix](https://compatibility.smartcar.com/legacy).