diff --git a/src/content/docs/en/reference/modules/astro-actions.mdx b/src/content/docs/en/reference/modules/astro-actions.mdx
index c32ad91899e8a..7d85ab5af3a03 100644
--- a/src/content/docs/en/reference/modules/astro-actions.mdx
+++ b/src/content/docs/en/reference/modules/astro-actions.mdx
@@ -443,6 +443,7 @@ import type {
   ActionAPIContext,
   ActionClient,
   ActionErrorCode,
+  ActionInputSchema,
   ActionReturnType,
   SafeResult,
  } from 'astro:actions';
@@ -546,6 +547,32 @@ button?.addEventListener('click', async () => {
 
 A union type of standard HTTP status codes [defined by IANA](https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml) using the human-readable versions as uppercase strings separated by an underscore (e.g. `BAD_REQUEST` or `PAYLOAD_TOO_LARGE`).
 
+### `ActionInputSchema`
+
+<p>
+
+**Type:** `ZodType`
+<Since v="5.16.0" />
+</p>
+
+A utility type that automatically infers the TypeScript type of an action's input based on its Zod schema. This can be useful to reference an action's [`input` validator type](#input-validator) as an object in your own type definitions.
+
+Returns `never` when [`input` validator](#input-validator) is omitted.
+
+The following example uses `ActionInputSchema` on an action named `contact` to:
+* Retrieve the Zod schema type for the input of the action.
+* Retrieve the expected input type of the action's validator.
+
+```astro title="src/components/Form.astro" {5}
+---
+import { actions, ActionInputSchema } from 'astro:actions';
+import { z } from 'astro/zod';
+
+type ContactSchema = ActionInputSchema<typeof actions.contact>;
+type ContactInput = z.input<ContactSchema>;
+---
+```
+
 ### `ActionReturnType`
 
 <p>