diff --git a/src/lib/api/adapters/__tests__/party.adapter.test.ts b/src/lib/api/adapters/__tests__/party.adapter.test.ts
index a7c7bb8e..d792ab93 100644
--- a/src/lib/api/adapters/__tests__/party.adapter.test.ts
+++ b/src/lib/api/adapters/__tests__/party.adapter.test.ts
@@ -18,7 +18,7 @@ describe('PartyAdapter', () => {
 		shortcode: 'ABC123',
 		name: 'Test Party',
 		description: 'Test description',
-		visibility: 0,
+		visibility: 'public',
 		user: {
 			id: 'user-1',
 			username: 'testuser'
diff --git a/src/lib/api/adapters/__tests__/user.adapter.test.ts b/src/lib/api/adapters/__tests__/user.adapter.test.ts
index 0a5e62d6..e691992e 100644
--- a/src/lib/api/adapters/__tests__/user.adapter.test.ts
+++ b/src/lib/api/adapters/__tests__/user.adapter.test.ts
@@ -52,7 +52,7 @@ describe('UserAdapter', () => {
     shortcode: 'abc123',
     name: 'Fire Team',
     user: mockUser,
-    visibility: 0,
+    visibility: 'public',
     element: 1,
     characters: [],
     weapons: [],
diff --git a/src/lib/api/schemas/party.ts b/src/lib/api/schemas/party.ts
index 6999626d..75700a6d 100644
--- a/src/lib/api/schemas/party.ts
+++ b/src/lib/api/schemas/party.ts
@@ -120,7 +120,7 @@ const MinimalScalarsSchema = z
     buttonCount: z.number().nullish().optional(),
     chainCount: z.number().nullish().optional(),
     turnCount: z.number().nullish().optional(),
-    visibility: z.number().nullish().optional()
+    visibility: z.enum(['public', 'private', 'unlisted']).nullish().optional()
   })
   .partial()
 
@@ -344,7 +344,7 @@ export const PartySchemaRaw = z.object({
   name: z.string().nullish(),
   description: z.string().nullish(),
   shortcode: z.string(),
-  visibility: z.number().nullish().default(1),
+  visibility: z.enum(['public', 'private', 'unlisted']).nullish().default('private'),
   element: z.number().nullish(),
   
   // Battle settings
diff --git a/src/lib/services/party.service.ts b/src/lib/services/party.service.ts
index 82a3911d..ba362ccf 100644
--- a/src/lib/services/party.service.ts
+++ b/src/lib/services/party.service.ts
@@ -35,7 +35,7 @@ export interface PartyUpdatePayload {
   chainCount?: number | null
   turnCount?: number | null
   jobId?: string
-  visibility?: number
+  visibility?: import('$lib/types/visibility').PartyVisibility
   localId?: string
 }
 
@@ -295,15 +295,7 @@ export class PartyService {
     if (payload.chainCount !== undefined) mapped.chainCount = payload.chainCount
     if (payload.turnCount !== undefined) mapped.turnCount = payload.turnCount
     if (payload.jobId !== undefined) mapped.jobId = payload.jobId
-    if (payload.visibility !== undefined) {
-      // Convert number visibility to string
-      const visibilityMap: Record<number, 'public' | 'private' | 'unlisted'> = {
-        0: 'public',
-        1: 'private',
-        2: 'unlisted'
-      }
-      mapped.visibility = visibilityMap[payload.visibility] || 'public'
-    }
+    if (payload.visibility !== undefined) mapped.visibility = payload.visibility
     if (payload.localId !== undefined) mapped.localId = payload.localId
 
     return mapped
diff --git a/src/lib/types/api/party.ts b/src/lib/types/api/party.ts
index 627323f8..7a70d442 100644
--- a/src/lib/types/api/party.ts
+++ b/src/lib/types/api/party.ts
@@ -92,7 +92,7 @@ export interface Party {
   buttonCount?: number
   turnCount?: number
   chainCount?: number
-  visibility?: number
+  visibility?: import('$lib/types/visibility').PartyVisibility
   element?: number
   favorited?: boolean
   extra?: boolean
@@ -125,7 +125,7 @@ export interface PartyPreview {
   shortcode: string
   name?: string
   favorited?: boolean
-  visibility?: number
+  visibility?: import('$lib/types/visibility').PartyVisibility
   raid?: {
     name: { en: string; ja: string }
     group?: {
diff --git a/src/lib/types/visibility.ts b/src/lib/types/visibility.ts
new file mode 100644
index 00000000..fe8a511a
--- /dev/null
+++ b/src/lib/types/visibility.ts
@@ -0,0 +1,44 @@
+/**
+ * Party visibility values
+ *
+ * These determine who can view a party:
+ * - public: Anyone can see it
+ * - private: Only the owner can see it
+ * - unlisted: Anyone with the link can see it (not in public listings)
+ */
+export const PartyVisibility = {
+	PUBLIC: 'public',
+	PRIVATE: 'private',
+	UNLISTED: 'unlisted'
+} as const
+
+export type PartyVisibility = (typeof PartyVisibility)[keyof typeof PartyVisibility]
+
+/**
+ * Legacy mapping from numeric visibility values to string literals
+ * Used for backward compatibility when reading from API
+ *
+ * @deprecated New code should use string literals directly
+ */
+export function numericToVisibility(value: number): PartyVisibility {
+	const map: Record<number, PartyVisibility> = {
+		0: PartyVisibility.PUBLIC,
+		1: PartyVisibility.PRIVATE,
+		2: PartyVisibility.UNLISTED
+	}
+	return map[value] ?? PartyVisibility.PUBLIC
+}
+
+/**
+ * Convert visibility string to numeric value for API compatibility
+ *
+ * @deprecated Should be removed once API accepts string literals
+ */
+export function visibilityToNumeric(value: PartyVisibility): number {
+	const map: Record<PartyVisibility, number> = {
+		[PartyVisibility.PUBLIC]: 0,
+		[PartyVisibility.PRIVATE]: 1,
+		[PartyVisibility.UNLISTED]: 2
+	}
+	return map[value]
+}