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

# Installation

> Install the Effect v4 prerelease line of effect-orpc and its peers.

Install the `effect-v4` prerelease dist tag with Effect v4.

<CodeGroup>
  ```bash npm theme={null}
  npm install effect-orpc@effect-v4 effect@^4.0.0-beta.83
  ```

  ```bash pnpm theme={null}
  pnpm add effect-orpc@effect-v4 effect@^4.0.0-beta.83
  ```

  ```bash bun theme={null}
  bun add effect-orpc@effect-v4 effect@^4.0.0-beta.83
  ```
</CodeGroup>

`effect-orpc@effect-v4` has peer dependencies on `effect`, `@orpc/server`, `@orpc/client`, `@orpc/contract` and `@orpc/shared`.

<Note>
  The Effect v4 package line is prerelease. Use the Effect V3 docs for the
  stable Effect 3 package line.
</Note>

***

## TypeScript

`effect-orpc` is published as an ESM TypeScript package and expects TypeScript 5 or newer.