diff --git a/packages/plugin-rsc/src/react/ssr.ts b/packages/plugin-rsc/src/react/ssr.ts
index 906ed3aac..b5184d854 100644
--- a/packages/plugin-rsc/src/react/ssr.ts
+++ b/packages/plugin-rsc/src/react/ssr.ts
@@ -1,7 +1,10 @@
 // @ts-ignore
 import * as ReactClient from '@vitejs/plugin-rsc/vendor/react-server-dom/client.edge'
 import { createServerConsumerManifest } from '../core/ssr'
-import type { CreateFromReadableStreamEdgeOptions } from '../types'
+import type {
+  CreateFromReadableStreamEdgeOptions,
+  EncodeReplyFunction,
+} from '../types'
 
 export { setRequireModule } from '../core/ssr'
 
@@ -19,5 +22,7 @@ export function createServerReference(id: string): unknown {
   return ReactClient.createServerReference(id)
 }
 
+export const encodeReply: EncodeReplyFunction = ReactClient.encodeReply
+
 export const callServer = null
 export const findSourceMapURL = null
diff --git a/packages/plugin-rsc/src/types/index.ts b/packages/plugin-rsc/src/types/index.ts
index bb827a7b4..62488e3b2 100644
--- a/packages/plugin-rsc/src/types/index.ts
+++ b/packages/plugin-rsc/src/types/index.ts
@@ -48,6 +48,7 @@ export interface RenderToReadableStreamOptions {
 export interface CreateFromReadableStreamBrowserOptions {
   callServer?: CallServerCallback
   debugChannel?: DebugChannel
+  encodeFormAction?: EncodeFormActionCallback
   endTime?: number
   environmentName?: string
   replayConsoleLogs?: boolean
@@ -58,6 +59,7 @@ export interface CreateFromReadableStreamBrowserOptions {
 // https://github.com/facebook/react/blob/8b2e903a7447d370eb77bb117bc4c0ae240ce831/packages/react-server-dom-webpack/src/client/ReactFlightDOMClientEdge.js#L74-L87
 export interface CreateFromReadableStreamEdgeOptions {
   debugChannel?: DebugChannel
+  encodeFormAction?: EncodeFormActionCallback
   endTime?: number
   environmentName?: string
   nonce?: string
@@ -78,6 +80,22 @@ export interface EncodeReplyOptions {
   signal?: AbortSignal
 }
 
+// https://github.com/facebook/react/blob/8b2e903a7447d370eb77bb117bc4c0ae240ce831/packages/react-client/src/ReactFlightReplyClient.js#L59-L62
+export type EncodeFormActionCallback = (
+  id: string,
+  args: Promise<unknown[]>,
+) => ReactCustomFormAction
+
+// https://github.com/facebook/react/blob/8b2e903a7447d370eb77bb117bc4c0ae240ce831/packages/shared/ReactTypes.js#L153-L160
+export type ReactCustomFormAction = {
+  name?: string
+  action?: string
+  encType?: string
+  method?: string
+  target?: string
+  data?: FormData | null
+}
+
 // TODO: technically encode/decodeReply can serialize non-array values
 export type EncodeReplyFunction = (
   value: unknown[],