diff --git a/openspec/changes/user-accounts/tasks.md b/openspec/changes/user-accounts/tasks.md
index 126be59..de7466d 100644
--- a/openspec/changes/user-accounts/tasks.md
+++ b/openspec/changes/user-accounts/tasks.md
@@ -37,7 +37,7 @@
 
 ## 7. Update Existing API Routes
 
-- [ ] 7.1 `[sonnet]` Add `getAuthUser()` check to all data API routes: `/api/upload`, `/api/candles`, `/api/charts`, `/api/annotations`, `/api/annotation-types`, `/api/span-annotations`, `/api/span-label-types`, `/api/export`
+- [x] 7.1 `[sonnet]` Add `getAuthUser()` check to all data API routes: `/api/upload`, `/api/candles`, `/api/charts`, `/api/annotations`, `/api/annotation-types`, `/api/span-annotations`, `/api/span-label-types`, `/api/export`
 - [ ] 7.2 `[opus]` Update all Drizzle queries to filter by `user_id` from authenticated session (SELECT, INSERT, DELETE)
 - [ ] 7.3 `[sonnet]` Add `getAuthUser()` check to all proxy API routes: `/api/predict`, `/api/predict/batch`, `/api/model/info`, `/api/model/load`, `/api/patterns/detect`, `/api/patterns/available`, `/api/training/start`, `/api/training/runs`
 - [ ] 7.4 `[haiku]` Add `X-User-ID` header to all fetch calls from proxy routes to the FastAPI ML service
diff --git a/src/app/api/annotation-types/[id]/route.ts b/src/app/api/annotation-types/[id]/route.ts
index 73fbb1e..f40524c 100644
--- a/src/app/api/annotation-types/[id]/route.ts
+++ b/src/app/api/annotation-types/[id]/route.ts
@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { annotationTypes } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 type RouteContext = {
   params: Promise<{ id: string }>;
@@ -12,6 +13,11 @@ export async function PATCH(
   request: NextRequest,
   context: RouteContext
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id } = await context.params;
     const idNum = parseInt(id, 10);
diff --git a/src/app/api/annotation-types/route.ts b/src/app/api/annotation-types/route.ts
index 7fa0c7d..396391e 100644
--- a/src/app/api/annotation-types/route.ts
+++ b/src/app/api/annotation-types/route.ts
@@ -2,9 +2,15 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { annotationTypes, annotations } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // GET - List all annotation types
 export async function GET() {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const types = await db.select().from(annotationTypes);
     return NextResponse.json(types);
@@ -19,6 +25,11 @@ export async function GET() {
 
 // POST - Create new annotation type or seed defaults
 export async function POST(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const body = await request.json();
 
@@ -103,6 +114,11 @@ export async function POST(request: NextRequest) {
 
 // DELETE - Delete annotation type (only if no annotations use it)
 export async function DELETE(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     const id = searchParams.get('id');
diff --git a/src/app/api/annotations/[id]/route.ts b/src/app/api/annotations/[id]/route.ts
index f2274c7..5db144b 100644
--- a/src/app/api/annotations/[id]/route.ts
+++ b/src/app/api/annotations/[id]/route.ts
@@ -2,11 +2,17 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { annotations } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 export async function PATCH(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id: idParam } = await params;
     const id = parseInt(idParam, 10);
@@ -55,6 +61,11 @@ export async function DELETE(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id: idParam } = await params;
     const id = parseInt(idParam, 10);
diff --git a/src/app/api/annotations/route.ts b/src/app/api/annotations/route.ts
index e50abcb..514abc7 100644
--- a/src/app/api/annotations/route.ts
+++ b/src/app/api/annotations/route.ts
@@ -2,9 +2,15 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { annotations, charts } from '@/lib/db/schema';
 import { eq, inArray, and, desc } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // GET annotations scoped by chartId
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     let chartId = searchParams.get('chartId');
@@ -48,6 +54,11 @@ export async function GET(request: NextRequest) {
 
 // POST create new annotation (requires chart_id)
 export async function POST(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const body = await request.json();
     const { timestamp, label_type, chart_id, geometry, color } = body;
@@ -101,6 +112,11 @@ export async function POST(request: NextRequest) {
 
 // DELETE annotations with bulk operations (scoped by chartId)
 export async function DELETE(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     const type = searchParams.get('type');
diff --git a/src/app/api/candles/route.ts b/src/app/api/candles/route.ts
index ee2d3b6..34be8b0 100644
--- a/src/app/api/candles/route.ts
+++ b/src/app/api/candles/route.ts
@@ -2,8 +2,14 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { candles, charts } from '@/lib/db/schema';
 import { asc, desc, eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     let chartId = searchParams.get('chartId');
diff --git a/src/app/api/charts/[id]/route.ts b/src/app/api/charts/[id]/route.ts
index 6be9952..8e24982 100644
--- a/src/app/api/charts/[id]/route.ts
+++ b/src/app/api/charts/[id]/route.ts
@@ -2,11 +2,17 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { charts, candles, annotations, spanAnnotations } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 export async function GET(
   _request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   const { id } = await params;
   const chartId = parseInt(id, 10);
 
@@ -27,6 +33,11 @@ export async function DELETE(
   _request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   const { id } = await params;
   const chartId = parseInt(id, 10);
 
diff --git a/src/app/api/charts/route.ts b/src/app/api/charts/route.ts
index 50b1990..65bed5d 100644
--- a/src/app/api/charts/route.ts
+++ b/src/app/api/charts/route.ts
@@ -2,8 +2,14 @@ import { NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { charts } from '@/lib/db/schema';
 import { desc } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 export async function GET() {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   const allCharts = await db.select().from(charts).orderBy(desc(charts.created_at));
   return NextResponse.json(allCharts);
 }
diff --git a/src/app/api/export/route.ts b/src/app/api/export/route.ts
index d39ba09..d00387c 100644
--- a/src/app/api/export/route.ts
+++ b/src/app/api/export/route.ts
@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { annotations, candles, charts } from '@/lib/db/schema';
 import { eq, and, desc } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 function sanitizeCsvCell(value: string): string {
   if (/^[=+@\-]/.test(value)) {
@@ -11,6 +12,11 @@ function sanitizeCsvCell(value: string): string {
 }
 
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     let chartId = searchParams.get('chartId');
diff --git a/src/app/api/export/spans/route.ts b/src/app/api/export/spans/route.ts
index a008814..6d66c39 100644
--- a/src/app/api/export/spans/route.ts
+++ b/src/app/api/export/spans/route.ts
@@ -2,12 +2,18 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanAnnotations, candles } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 function toUnix(d: Date): number {
   return Math.floor(d.getTime() / 1000);
 }
 
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const searchParams = request.nextUrl.searchParams;
     const chartId = searchParams.get('chartId');
diff --git a/src/app/api/span-annotations/[id]/route.ts b/src/app/api/span-annotations/[id]/route.ts
index 8ce9baa..e77201a 100644
--- a/src/app/api/span-annotations/[id]/route.ts
+++ b/src/app/api/span-annotations/[id]/route.ts
@@ -2,12 +2,18 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanAnnotations } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // PATCH - Update span annotation
 export async function PATCH(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id } = await params;
     const idNum = parseInt(id, 10);
@@ -72,6 +78,11 @@ export async function DELETE(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id } = await params;
     const idNum = parseInt(id, 10);
diff --git a/src/app/api/span-annotations/export/route.ts b/src/app/api/span-annotations/export/route.ts
index a3e964e..2b6b5ae 100644
--- a/src/app/api/span-annotations/export/route.ts
+++ b/src/app/api/span-annotations/export/route.ts
@@ -2,6 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanAnnotations, charts } from '@/lib/db/schema';
 import { eq, desc } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 function sanitizeCsvCell(value: string): string {
   if (/^[=+@\-]/.test(value)) {
@@ -37,6 +38,11 @@ function sanitizeCsvCell(value: string): string {
  * }
  */
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     let chartId = searchParams.get('chartId');
diff --git a/src/app/api/span-annotations/route.ts b/src/app/api/span-annotations/route.ts
index b1ec261..2faf191 100644
--- a/src/app/api/span-annotations/route.ts
+++ b/src/app/api/span-annotations/route.ts
@@ -2,9 +2,15 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanAnnotations } from '@/lib/db/schema';
 import { eq, desc, and } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // GET - List all span annotations for a chart
 export async function GET(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     const chartId = searchParams.get('chartId');
@@ -49,6 +55,11 @@ export async function GET(request: NextRequest) {
 
 // POST - Create new span annotation
 export async function POST(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const body = await request.json();
     const {
@@ -111,6 +122,11 @@ export async function POST(request: NextRequest) {
 
 // DELETE - Bulk delete span annotations by chartId + optional source/label filters
 export async function DELETE(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { searchParams } = request.nextUrl;
     const chartId = searchParams.get('chartId');
diff --git a/src/app/api/span-label-types/[id]/route.ts b/src/app/api/span-label-types/[id]/route.ts
index 09b0893..2f1bd78 100644
--- a/src/app/api/span-label-types/[id]/route.ts
+++ b/src/app/api/span-label-types/[id]/route.ts
@@ -2,12 +2,18 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanLabelTypes, spanAnnotations } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // PATCH - Update span label type
 export async function PATCH(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id } = await params;
     const idNum = parseInt(id, 10);
@@ -75,6 +81,11 @@ export async function DELETE(
   request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const { id } = await params;
     const idNum = parseInt(id, 10);
diff --git a/src/app/api/span-label-types/route.ts b/src/app/api/span-label-types/route.ts
index f6563b6..96b9483 100644
--- a/src/app/api/span-label-types/route.ts
+++ b/src/app/api/span-label-types/route.ts
@@ -2,9 +2,15 @@ import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/lib/db';
 import { spanLabelTypes } from '@/lib/db/schema';
 import { eq } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 // GET - List all span label types (active only, sorted by sort_order)
 export async function GET() {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const types = await db
       .select()
@@ -24,6 +30,11 @@ export async function GET() {
 
 // POST - Create new span label type
 export async function POST(request: NextRequest) {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const body = await request.json();
     const { name, display_name, color, hotkey, sort_order } = body;
diff --git a/src/app/api/upload/route.ts b/src/app/api/upload/route.ts
index 10d57a9..4990fde 100644
--- a/src/app/api/upload/route.ts
+++ b/src/app/api/upload/route.ts
@@ -3,6 +3,7 @@ import Papa from 'papaparse';
 import { db } from '@/lib/db';
 import { candles, charts } from '@/lib/db/schema';
 import { eq, like } from 'drizzle-orm';
+import { getAuthUser } from '@/lib/auth';
 
 async function getUniqueChartName(baseName: string): Promise<string> {
   // Check if the base name is already taken
@@ -25,6 +26,11 @@ async function getUniqueChartName(baseName: string): Promise<string> {
 }
 
 export async function POST(request: NextRequest): Promise<NextResponse> {
+  const user = await getAuthUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+
   try {
     const formData = await request.formData();
     const file = formData.get('file') as File;