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

# ABI Metadata & Capability Discovery

# ABI Metadata & Capability Discovery

<mintly-toc>
  The ABI exposes metadata entrypoints so tools, gateways, and language bindings
  can discover the loaded ABI version and supported transports/vendors/features
  at runtime.
</mintly-toc>

## Entry Points

| Layer  | Version                      | Capabilities                           |
| ------ | ---------------------------- | -------------------------------------- |
| C ABI  | `motor_abi_version()`        | `motor_abi_capabilities_json()`        |
| Python | `motorbridge.abi_version()`  | `motorbridge.abi_capabilities()`       |
| C++    | `motorbridge::abi_version()` | `motorbridge::abi_capabilities_json()` |

## Python Example

```python theme={null}
import motorbridge

print(motorbridge.abi_version())
caps = motorbridge.abi_capabilities()
# caps exposes supported transports, vendors, modes, and ops
```

## Use Cases

* Gateways (e.g. `ws_gateway`) report `gateway_version` and capability flags
  via the `{"op":"capabilities"}` operation.
* Language bindings and tools detect transport/vendor/mode support without
  hard-coding matrices.

## See Also

* [ABI Guide](/source/project/abi)
* [API: Controller](/api/controller)
* [WebSocket Gateway](/source/integrations/ws-gateway/overview)