diff --git a/apps/econ/README.md b/apps/econ/README.md
index 1ab5e7d..3f586a3 100644
--- a/apps/econ/README.md
+++ b/apps/econ/README.md
@@ -53,7 +53,7 @@ missing/invalid). `~` = optional auth: served to anyone, personalised for a vali
 | POST     | `/api/challenge/v2/updateProgress`                   | ✓    | Report challenge progress               |
 | GET      | `/api/gamerewards/v1/pending`                        |      | Pending game rewards (stub `[]`)        |
 | POST     | `/api/gamerewards/v1/request`                        | ✓    | Claim a game reward → 10 XP + gift box  |
-| GET      | `/api/roomkeys/v1/mine`                              |      | The player's room keys (stub `[]`)      |
+| GET      | `/api/roomkeys/v1/mine`                              | ✓    | The player's held room keys             |
 | GET      | `/api/roomkeys/v1/room`                              |      | The keys a room has listed              |
 | POST     | `/api/roomkeys/v1/create`                            | ✓    | List a key for a room (owner/co-owner)  |
 | PUT      | `/api/roomkeys/v1/updateAll`                         | ✓    | Edit one key (owner/co-owner)           |
diff --git a/apps/econ/src/econ.app.ts b/apps/econ/src/econ.app.ts
index 26561d3..f3bc11f 100644
--- a/apps/econ/src/econ.app.ts
+++ b/apps/econ/src/econ.app.ts
@@ -147,6 +147,7 @@ import {
 	RoomCurrencyPurchaseOfferEnvelope,
 	RoomCurrencyPurchaseOffersDto,
 	RoomEconConfig,
+	HeldRoomKeyDto,
 	RoomKeyDto,
 	RoomKeyEnvelope,
 	RoomPurchasableList,
@@ -195,6 +196,7 @@ import {
 	claimRoomKey,
 	createRoomKey,
 	getRoomKey,
+	getHeldRoomKeys,
 	getRoomKeys,
 	getRoomOwnerId,
 	ownsRoomKeys,
@@ -6391,9 +6393,31 @@ const app = new Hono<App>({ strict: false })
 		}
 	)
 
-	// The player's room keys. Returns "[]": nothing sells a key yet, so nobody holds one.
-	.get('/api/roomkeys/v1/mine', listRoute('The player’s room keys', 'Empty for now'), (c) =>
-		c.json([])
+	// The caller's room keys: every key they hold (`room_key_player`), across all rooms.
+	.get(
+		'/api/roomkeys/v1/mine',
+		describeRoute({
+			tags: ['Econ'],
+			summary: 'The player’s room keys',
+			description: [
+				'Every key the caller holds — bought, awarded, or taken free as a room manager —',
+				'across every room, oldest key first. No parameters.',
+				'',
+				'Each entry is the room key plus `IsGiftable` (false) and `Visibility` (0), with',
+				'`ImageName` as "" rather than null when the key has no art — the shape observed',
+				'from the live client, which differs from `/api/roomkeys/v1/room`’s.',
+			].join('\n'),
+			security: AUTHED,
+			responses: {
+				200: json(HeldRoomKeyDto.array(), 'The caller’s keys, oldest first'),
+				401: UNAUTHORIZED_RESPONSE,
+			},
+		}),
+		async (c) => {
+			const id = await authedId(c)
+			if (id === null) return unauthorized(c)
+			return c.json(await getHeldRoomKeys(c.env.DB, id))
+		}
 	)
 	// The keys a room has listed. Public, like the room's currencies: a key is offered to
 	// whoever walks up to the door it opens. A room with none, an unknown room and a missing
diff --git a/apps/econ/src/openapi.ts b/apps/econ/src/openapi.ts
index 308a14e..0b21737 100644
--- a/apps/econ/src/openapi.ts
+++ b/apps/econ/src/openapi.ts
@@ -779,6 +779,13 @@ export const RoomKeyDto = z.object({
 	Type: z.int().describe('The key type’s ordinal: 0 `Key`, the only one seen'),
 })
 
+/** A held key as `GET /api/roomkeys/v1/mine` serves it — the room key plus two fields. */
+export const HeldRoomKeyDto = RoomKeyDto.extend({
+	ImageName: z.string().describe('The key’s art; "" when it has none (NOT null, unlike the list)'),
+	IsGiftable: z.boolean().describe('Always false — gifting keys is not modelled'),
+	Visibility: z.int().describe('Always 0 — not modelled'),
+})
+
 /**
  * The envelope `POST /api/roomkeys/v1/create` answers in: `{ Status, RoomKey }`, observed from
  * the live client — NOT the `{ Value, Success, Error, error_id }` the room-currency and
diff --git a/apps/econ/src/room-key-db.ts b/apps/econ/src/room-key-db.ts
index 230b746..93eaf0a 100644
--- a/apps/econ/src/room-key-db.ts
+++ b/apps/econ/src/room-key-db.ts
@@ -213,6 +213,38 @@ export async function getRoomKeys(db: D1Database, roomId: number): Promise<RoomK
 	return results.map(toRoomKey)
 }
 
+/**
+ * A key as `GET /api/roomkeys/v1/mine` serves it — observed from the live client: the
+ * {@link RoomKey} plus `IsGiftable` and `Visibility`, and `ImageName` as '' (not null) on a
+ * key without art. Neither extra field is modelled here, so both are served as their 0/false.
+ */
+export interface HeldRoomKey extends Omit<RoomKey, 'ImageName'> {
+	ImageName: string
+	IsGiftable: boolean
+	Visibility: number
+}
+
+/** Every key `accountId` holds, across all rooms, in creation order. */
+export async function getHeldRoomKeys(db: D1Database, accountId: number): Promise<HeldRoomKey[]> {
+	const { results } = await db
+		.prepare(
+			`SELECT ${SELECT_COLUMNS.split(', ')
+				.map((col) => `k.${col}`)
+				.join(', ')}
+			 FROM room_key_player p JOIN room_key k ON k.room_key_id = p.room_key_id
+			 WHERE p.account_id = ?1 ORDER BY k.room_key_id`
+		)
+		.bind(accountId)
+		.all<RoomKeyRow>()
+
+	return results.map((row) => ({
+		...toRoomKey(row),
+		ImageName: row.image_name,
+		IsGiftable: false,
+		Visibility: 0,
+	}))
+}
+
 /**
  * Award a player a room key, answering when they came to hold it — now, or the first award's
  * time when they already did (a key is held once; re-awarding is a no-op). Null when
diff --git a/apps/econ/src/test/integration/api.test.ts b/apps/econ/src/test/integration/api.test.ts
index ea8872e..79d0108 100644
--- a/apps/econ/src/test/integration/api.test.ts
+++ b/apps/econ/src/test/integration/api.test.ts
@@ -7211,10 +7211,77 @@ describe('econ endpoints', () => {
 		expect(rows?.count).toBe(0)
 	})
 
-	test('GET /api/roomkeys/v1/mine returns []', async () => {
-		const res = await exports.default.fetch(`${ORIGIN}/api/roomkeys/v1/mine`)
+	test('GET /api/roomkeys/v1/mine lists the keys the caller holds, across rooms', async () => {
+		const mine = async (sub: string | null) =>
+			exports.default.fetch(
+				`${ORIGIN}/api/roomkeys/v1/mine`,
+				sub === null ? undefined : { headers: await bearer(sub) }
+			)
+		expect((await mine(null)).status).toBe(401)
+		expect(await (await mine('7601')).json()).toEqual([])
+
+		const insert = async (roomId: number, name: string, imageName: string) =>
+			(await env.DB.prepare(
+				`INSERT INTO room_key
+					(replication_id, room_id, key_type, name, description, price, purchase_currency_id, image_name, created_at)
+				 VALUES ('0f8c3a7e-1d42-4b90-9c11-7a6e5d2b8f03', ?1, 'Key', ?2, '', 0, NULL, ?3, '2026-10-14T12:00:00Z')
+				 RETURNING room_key_id`
+			)
+				.bind(roomId, name, imageName)
+				.first<{ room_key_id: number }>())!.room_key_id
+		const a = await insert(12, 'VIP Key', '')
+		const b = await insert(2511, 'Art Key', 'key.png')
+		const notHeld = await insert(12, 'Other', '')
+		for (const [key, account] of [
+			[b, 7601],
+			[a, 7601],
+			[notHeld, 7602],
+		]) {
+			await env.DB.prepare(
+				"INSERT INTO room_key_player (room_key_id, account_id, awarded_at) VALUES (?1, ?2, '')"
+			)
+				.bind(key, account)
+				.run()
+		}
+
+		const res = await mine('7601')
 		expect(res.status).toBe(200)
-		expect(await res.json()).toEqual([])
+		const keys = (await res.json()) as Array<Record<string, unknown>>
+		expect(keys).toEqual([
+			{
+				RoomKeyId: a,
+				ReplicationId: '0f8c3a7e-1d42-4b90-9c11-7a6e5d2b8f03',
+				RoomId: 12,
+				Name: 'VIP Key',
+				Description: '',
+				Price: 0,
+				PurchaseCurrencyId: null,
+				CreatedAt: '2026-10-14T12:00:00Z',
+				ImageName: '',
+				Type: 0,
+				IsGiftable: false,
+				Visibility: 0,
+			},
+			expect.objectContaining({ RoomKeyId: b, RoomId: 2511, ImageName: 'key.png' }),
+		])
+		// Member order as the client was observed receiving it.
+		expect(Object.keys(keys[0]!)).toEqual([
+			'RoomKeyId',
+			'ReplicationId',
+			'RoomId',
+			'Name',
+			'Description',
+			'Price',
+			'PurchaseCurrencyId',
+			'CreatedAt',
+			'ImageName',
+			'Type',
+			'IsGiftable',
+			'Visibility',
+		])
+
+		await env.DB.prepare('DELETE FROM room_key_player').run()
+		await env.DB.prepare('DELETE FROM room_key').run()
 	})
 
 	test('GET /api/subscriptionseasons/v1/seasons/current returns []', async () => {