diff --git a/web-player/src/lib/server/mappers.test.ts b/web-player/src/lib/server/mappers.test.ts
index b33e468..0c2a789 100644
--- a/web-player/src/lib/server/mappers.test.ts
+++ b/web-player/src/lib/server/mappers.test.ts
@@ -5,6 +5,8 @@ import {
 	toCount,
 	toDatedTrack,
 	toLikedTrack,
+	toCoauthorInvitation,
+	toLibraryTrack,
 	toListeningStats,
 	toMix,
 	toPage,
@@ -25,7 +27,7 @@ const trackDto: components['schemas']['TrackApplicationResponse'] = {
 	tags: [],
 	isExplicit: true,
 	isPublished: true,
-	coauthors: []
+	coauthors: [{ id: 'u2', name: 'Guest' }]
 };
 
 describe('toTrack', () => {
@@ -37,7 +39,8 @@ describe('toTrack', () => {
 			ownerUserId: '42',
 			explicit: true,
 			duration: 183.5,
-			listensCount: 12
+			listensCount: 12,
+			coauthors: [{ id: 'u2', name: 'Guest' }]
 		});
 	});
 	it('falls back to 0 for invalid numbers', () => {
@@ -71,7 +74,8 @@ describe('toMix', () => {
 				ownerUserId: null,
 				explicit: false,
 				duration: 60,
-				listensCount: 3
+				listensCount: 3,
+				coauthors: []
 			}
 		]);
 	});
@@ -168,3 +172,35 @@ describe('toListeningStats', () => {
 		});
 	});
 });
+
+describe('toLibraryTrack', () => {
+	it('keeps the coauthor invites with their status', () => {
+		const track = toLibraryTrack({
+			...trackDto,
+			albums: [],
+			coauthorInvites: [
+				{ userId: 'u2', name: 'Guest', status: 'Accepted' },
+				{ userId: 'u3', name: 'Other', status: 'Pending' }
+			]
+		});
+		expect(track.coauthorInvites).toEqual([
+			{ userId: 'u2', name: 'Guest', status: 'Accepted' },
+			{ userId: 'u3', name: 'Other', status: 'Pending' }
+		]);
+		expect(track.coauthors).toEqual([{ id: 'u2', name: 'Guest' }]);
+	});
+});
+
+describe('toCoauthorInvitation', () => {
+	it('copies the invitation fields', () => {
+		const dto = {
+			id: 'i1',
+			trackId: 't1',
+			trackTitle: 'Song',
+			artist: null,
+			ownerUserId: '42',
+			invitedAt: '2026-01-02T00:00:00Z'
+		};
+		expect(toCoauthorInvitation(dto)).toEqual(dto);
+	});
+});
diff --git a/web-player/src/lib/server/mappers.ts b/web-player/src/lib/server/mappers.ts
index 0146fbb..69ed4fe 100644
--- a/web-player/src/lib/server/mappers.ts
+++ b/web-player/src/lib/server/mappers.ts
@@ -1,6 +1,8 @@
 import type { components } from '$lib/api/schema';
 import type {
 	Album,
+	CoauthorInvitation,
+	CoauthorInvite,
 	LibraryTrack,
 	TrackStatusCounts,
 	LikedTrack,
@@ -13,6 +15,8 @@ import type {
 
 type TrackDto = components['schemas']['TrackApplicationResponse'];
 type UserTrackDto = components['schemas']['UserTrackApplicationResponse'];
+type CoauthorInviteDto = components['schemas']['TrackCoauthorInviteReference'];
+type CoauthorInvitationDto = components['schemas']['CoauthorInvitationResponse'];
 type StatusCountsDto = components['schemas']['TrackStatusCountsResponse'];
 type AlbumDto = components['schemas']['AlbumApplicationResponse'];
 type PlaylistDto = components['schemas']['PlayListApplicationResponse'];
@@ -34,7 +38,8 @@ export function toTrack(dto: TrackDto): Track {
 		ownerUserId: dto.ownerUserId,
 		explicit: dto.isExplicit,
 		duration: Number(dto.duration) || 0,
-		listensCount: Number(dto.listensCount) || 0
+		listensCount: Number(dto.listensCount) || 0,
+		coauthors: dto.coauthors.map(({ id, name }) => ({ id, name }))
 	};
 }
 
@@ -42,6 +47,21 @@ export function toDatedTrack(dto: TrackDto): Track & { date: string } {
 	return { ...toTrack(dto), date: dto.createdAt };
 }
 
+export function toCoauthorInvite({ userId, name, status }: CoauthorInviteDto): CoauthorInvite {
+	return { userId, name, status };
+}
+
+export function toCoauthorInvitation(dto: CoauthorInvitationDto): CoauthorInvitation {
+	return {
+		id: dto.id,
+		trackId: dto.trackId,
+		trackTitle: dto.trackTitle,
+		artist: dto.artist,
+		ownerUserId: dto.ownerUserId,
+		invitedAt: dto.invitedAt
+	};
+}
+
 export function toLibraryTrack(dto: UserTrackDto): LibraryTrack {
 	return {
 		...toDatedTrack(dto),
@@ -49,7 +69,8 @@ export function toLibraryTrack(dto: UserTrackDto): LibraryTrack {
 		genres: dto.tags,
 		albums: dto.albums,
 		albumTitle: dto.albums.length > 0 ? dto.albums.map((album) => album.title).join(', ') : null,
-		published: dto.isPublished
+		published: dto.isPublished,
+		coauthorInvites: dto.coauthorInvites.map(toCoauthorInvite)
 	};
 }
 
@@ -75,7 +96,8 @@ export function toMixTrack(item: MixItemDto): Track {
 		ownerUserId: null,
 		explicit: false,
 		duration: Number(item.durationSeconds) || 0,
-		listensCount: Number(item.listensCount) || 0
+		listensCount: Number(item.listensCount) || 0,
+		coauthors: []
 	};
 }
 
diff --git a/web-player/src/lib/types.ts b/web-player/src/lib/types.ts
index df54b79..ffa136e 100644
--- a/web-player/src/lib/types.ts
+++ b/web-player/src/lib/types.ts
@@ -7,6 +7,28 @@ export interface SessionUser {
 
 export type FollowList = 'followers' | 'following';
 
+export interface TrackCoauthor {
+	id: string;
+	name: string;
+}
+
+export type CoauthorStatus = 'Pending' | 'Accepted' | 'Rejected';
+
+export interface CoauthorInvite {
+	userId: string;
+	name: string;
+	status: CoauthorStatus;
+}
+
+export interface CoauthorInvitation {
+	id: string;
+	trackId: string;
+	trackTitle: string;
+	artist: string | null;
+	ownerUserId: string;
+	invitedAt: string;
+}
+
 export interface Track {
 	id: string;
 	title: string;
@@ -15,6 +37,7 @@ export interface Track {
 	explicit: boolean;
 	duration: number;
 	listensCount: number;
+	coauthors: TrackCoauthor[];
 }
 
 export interface GenreOption {
@@ -31,6 +54,7 @@ export interface LibraryTrack extends Track {
 	albumTitle: string | null;
 	albums: { id: string; title: string }[];
 	published: boolean;
+	coauthorInvites: CoauthorInvite[];
 }
 
 export interface TrackStatusCounts {