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

# Midaz and plugin compatibility

> Which capabilities the unified Ledger serves as modules, and which ones deploy as separate plugin Helm releases.

## Midaz application v4

***

| Capability            | Deployment model                  | API surface                  |
| :-------------------- | :-------------------------------- | :--------------------------- |
| CRM                   | Unified Ledger module             | `/v2` only                   |
| Fees                  | Unified Ledger module             | `/v2` only                   |
| Pix and Bank Transfer | Separately released plugin charts | See each chart and API guide |

In Midaz application v4, the unified Ledger contains CRM and Fees as modules. The Helm chart has its own version line. Use their `/v2` API through the Ledger. They are not separate services, ports, plugins, or Helm releases. The `/v1` compatibility surface does not run Fees or Tracer.

## Chart surfaces

***

CRM is a module inside the `midaz-helm` chart. You enable it with the `crm` values block. No CRM chart exists.

The `plugin-fees-helm` chart remains published for releases that predate the unified Ledger. Its versions do not define Midaz application v4 compatibility.