diff --git a/apps/econ/src/econ.app.ts b/apps/econ/src/econ.app.ts
index 8b4397f..00c6f1d 100644
--- a/apps/econ/src/econ.app.ts
+++ b/apps/econ/src/econ.app.ts
@@ -18,6 +18,7 @@ import weeklyChallenge from '../static/weekly-challenge.json'
 import { getAvatar, setAvatar } from './avatar-db'
 import {
 	ALL_PLATFORMS,
+	CurrencyType,
 	DEFAULT_STARTING_TOKENS,
 	getBalance,
 	isSpendable,
@@ -40,7 +41,9 @@ import {
 	BuyItemResponse,
 	ChallengeProgressRequest,
 	ChallengeProgressResponse,
+	ChecklistCompleteResponse,
 	ChecklistEntry,
+	CompleteChecklistRequest,
 	ConsumeConsumableRequest,
 	ConsumeEnvelope,
 	ConsumeGiftRequest,
@@ -363,6 +366,9 @@ const DEFAULT_CHECKLIST = [
 	{ Order: 4, Objective: 6, Count: 1, CreditAmount: 25 }, // CheerAPlayer
 ]
 
+/** The `UpdateResponse` context a checklist reward is reported under. */
+const CHECKLIST_REWARD_CONTEXT = 303
+
 /**
  * A concise `describeRoute` spec for a route that serves an opaque JSON array — either
  * a static catalog served verbatim or an empty-list stub. `auth` adds the bearer
@@ -579,6 +585,44 @@ const app = new Hono<App>({ strict: false })
 		}
 	)
 
+	// Mark a checklist row done. [Authorize]. Stubbed: there is no objective-progress
+	// table to record the completion in, and no reward ledger to make the 25-token grant
+	// once-only — without one, re-posting the same row would mint tokens indefinitely, so
+	// we grant nothing and report a change of 0. The envelope is still the balance-update
+	// shape the client parses, so the flow completes instead of erroring.
+	.on(
+		'POST',
+		['/api/checklist/v1/complete', '/api/checklist/v2/complete'],
+		describeRoute({
+			tags: ['Econ'],
+			summary: 'Complete a checklist row (stub)',
+			description:
+				'Marks a NUX checklist row done. Stubbed: nothing records the completion (no ' +
+				'objective-progress table) and nothing is granted — a reward is worth 25 XP and 25 ' +
+				'tokens, but making that once-only needs a ledger we do not have, and without one ' +
+				're-posting the same row would mint tokens indefinitely. The response is still the ' +
+				'balance-update envelope, with `Balance` (the change) 0. v1 and v2 behave alike.',
+			security: AUTHED,
+			requestBody: jsonBody(CompleteChecklistRequest, 'Which row was completed — `{ ItemIndex }`'),
+			responses: {
+				200: json(ChecklistCompleteResponse, 'The balance-update envelope, granting nothing'),
+				401: UNAUTHORIZED_RESPONSE,
+			},
+		}),
+		async (c) => {
+			const id = await authedId(c)
+			if (id === null) return unauthorized(c)
+			// The body names the row (`{ ItemIndex: 1 }`, or `Id` as a fallback) — read only
+			// once there is somewhere to record it.
+			return c.json({
+				BalanceUpdates: [{ UpdateResponse: CHECKLIST_REWARD_CONTEXT, Data: [] }],
+				Balance: 0,
+				CurrencyType: CurrencyType.RecCenterTokens,
+				BalanceType: -2,
+			})
+		}
+	)
+
 	// The player's item wishlist. [Authorize]; empty without a DB binding.
 	.get(
 		'/api/itemWishlists/v1/wishlist/me',
diff --git a/apps/econ/src/openapi.ts b/apps/econ/src/openapi.ts
index d60d284..6beb3ea 100644
--- a/apps/econ/src/openapi.ts
+++ b/apps/econ/src/openapi.ts
@@ -115,6 +115,28 @@ export const AvatarItemV4Dto = z.object({
 	isBaseAvatarItem: z.boolean(),
 })
 
+/**
+ * `POST /api/checklist/v1|v2/complete` JSON body — which checklist row was finished.
+ * The client posts just `{ "ItemIndex": 1 }`; `Id` is the fallback key read when
+ * `ItemIndex` is absent or 0.
+ */
+export const CompleteChecklistRequest = z.object({
+	ItemIndex: z.int().describe('The row’s index — what the client actually sends'),
+	Id: z.int().optional().describe('Fallback row id, read when ItemIndex is absent or 0'),
+})
+
+/**
+ * `POST /api/checklist/v1|v2/complete` — the balance-update envelope, the same shape
+ * buyItem answers with. `Balance` is the CHANGE applied, so a stubbed (ungranted)
+ * completion reports 0. `UpdateResponse` 303 is the checklist-reward context.
+ */
+export const ChecklistCompleteResponse = z.object({
+	BalanceUpdates: z.array(z.object({ UpdateResponse: z.int(), Data: z.array(JsonObject) })),
+	Balance: z.int().describe('The change applied — 0 while completion is stubbed'),
+	CurrencyType: z.int(),
+	BalanceType: z.int().describe('-2 = account-wide'),
+})
+
 /**
  * One row of the new-user checklist (`GET /api/checklist/v1|v2/current`). `Objective` is
  * an `ObjectiveType` ordinal the client matches its own progress events against.
diff --git a/apps/econ/src/test/integration/api.test.ts b/apps/econ/src/test/integration/api.test.ts
index 4744190..7b5df64 100644
--- a/apps/econ/src/test/integration/api.test.ts
+++ b/apps/econ/src/test/integration/api.test.ts
@@ -311,6 +311,37 @@ describe('econ endpoints', () => {
 		}
 	})
 
+	test('POST /api/checklist/v1|v2/complete 401s without a token, grants nothing with one', async () => {
+		for (const path of ['/api/checklist/v1/complete', '/api/checklist/v2/complete']) {
+			const anon = await exports.default.fetch(`${ORIGIN}${path}`, {
+				method: 'POST',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({ ItemIndex: 1 }),
+			})
+			expect(anon.status).toBe(401)
+
+			const res = await exports.default.fetch(`${ORIGIN}${path}`, {
+				method: 'POST',
+				headers: { ...(await bearer('33')), 'Content-Type': 'application/json' },
+				body: JSON.stringify({ ItemIndex: 1 }),
+			})
+			expect(res.status).toBe(200)
+			expect(await res.json()).toEqual({
+				BalanceUpdates: [{ UpdateResponse: 303, Data: [] }],
+				Balance: 0,
+				CurrencyType: 2,
+				BalanceType: -2,
+			})
+		}
+
+		// Stubbed, so completing rows does not move the balance — re-posting cannot farm
+		// tokens, and the checklist still lists every row.
+		const bal = await exports.default.fetch(`${ORIGIN}/api/storefronts/v4/balance/2`, {
+			headers: await bearer('33'),
+		})
+		expect(await bal.json()).toEqual([{ CurrencyType: 2, Platform: -2, Balance: 10000 }])
+	})
+
 	test('GET /api/itemWishlists/v1/wishlist/me 401s without a token, returns [] with one', async () => {
 		const anon = await exports.default.fetch(`${ORIGIN}/api/itemWishlists/v1/wishlist/me`)
 		expect(anon.status).toBe(401)
@@ -1223,6 +1254,8 @@ describe('econ endpoints', () => {
 			'POST /api/avatar/v3/saved/set',
 			'POST /api/avatar/v4/saved/set',
 			'POST /api/challenge/v2/updateProgress',
+			'POST /api/checklist/v1/complete',
+			'POST /api/checklist/v2/complete',
 			'POST /api/consumables/v1/consume',
 			'POST /api/gamerewards/v1/request',
 			'POST /api/objectives/v1/cleargroup',