diff --git a/openapi.yaml b/openapi.yaml
index b7b3768..9f3d5f3 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -1,4 +1,4 @@
-openapi: 3.0.3
+openapi: 3.1.0
 info:
   title: PyPI Stats API
   version: 1.0.0
@@ -237,7 +237,7 @@ paths:
         - in: path
           name: type
           required: true
-          schema: { type: string, enum: [overall, python_major, python_minor, system] }
+          schema: { type: string, enum: [overall, python_major, python_minor, system, installer, version] }
         - in: query
           name: chart
           schema: { type: string, enum: [line, bar] }
@@ -254,17 +254,50 @@ paths:
           name: os
           schema: { type: string, enum: [Windows, Linux, Darwin, other] }
           description: Only for type=system
+        - in: query
+          name: format
+          schema: { type: string, enum: [json, data] }
+          description: Return JSON payload for interactive charts instead of a PNG image
+        - in: query
+          name: nocache
+          schema: { type: string }
+          description: Set to '1' to bypass server-side chart cache
+        - in: query
+          name: cache
+          schema: { type: string }
+          description: Set to 'false' to bypass server-side chart cache
       responses:
         '200':
-          description: PNG image
+          description: PNG image by default, or JSON when format=json
           content:
             image/png:
               schema:
                 type: string
                 format: binary
+            application/json:
+              schema:
+                type: object
+                properties:
+                  package: { type: string }
+                  type: { type: string }
+                  chartType: { type: string, enum: [line, bar] }
+                  title: { type: string }
+                  labels:
+                    type: array
+                    items: { type: string }
+                  datasets:
+                    type: array
+                    items:
+                      type: object
+                      properties:
+                        label: { type: string }
+                        data:
+                          type: array
+                          items: { type: number }
         '400': { description: Bad request }
         '404': { description: Package not found }
 
+
 components:
   securitySchemes: {}
 
diff --git a/src/routes/api/admin/cache/+server.ts b/src/routes/api/admin/cache/+server.ts
deleted file mode 100644
index a08264d..0000000
--- a/src/routes/api/admin/cache/+server.ts
+++ /dev/null
@@ -1,88 +0,0 @@
-import { json } from '@sveltejs/kit';
-import type { RequestHandler } from './$types';
-import { CacheManager } from '$lib/redis.js';
-import { clearAllCache, invalidatePackageCache, invalidateSearchCache } from '$lib/api.js';
-
-const cache = new CacheManager();
-
-export const GET: RequestHandler = async () => {
-  try {
-    // Get cache statistics
-    const stats = {
-      message: 'Cache management endpoint',
-      operations: ['GET', 'POST', 'DELETE'],
-      endpoints: {
-        'GET /api/admin/cache': 'Get cache information',
-        'POST /api/admin/cache/clear': 'Clear all cache',
-        'POST /api/admin/cache/invalidate-package': 'Invalidate package cache',
-        'POST /api/admin/cache/invalidate-search': 'Invalidate search cache'
-      }
-    };
-    
-    return json(stats);
-  } catch (error) {
-    return json({ error: 'Failed to get cache information' }, { status: 500 });
-  }
-};
-
-export const POST: RequestHandler = async ({ request }) => {
-  try {
-    const body = await request.json();
-    const { action, packageName } = body;
-    
-    switch (action) {
-      case 'clear':
-        await clearAllCache();
-        return json({ 
-          success: true, 
-          message: 'All cache cleared successfully' 
-        });
-        
-      case 'invalidate-package':
-        if (!packageName) {
-          return json({ 
-            error: 'Package name is required' 
-          }, { status: 400 });
-        }
-        await invalidatePackageCache(packageName);
-        return json({ 
-          success: true, 
-          message: `Cache invalidated for package: ${packageName}` 
-        });
-        
-      case 'invalidate-search':
-        await invalidateSearchCache();
-        return json({ 
-          success: true, 
-          message: 'Search cache invalidated successfully' 
-        });
-        
-      default:
-        return json({ 
-          error: 'Invalid action. Use: clear, invalidate-package, or invalidate-search' 
-        }, { status: 400 });
-    }
-  } catch (error) {
-    console.error('Cache management error:', error);
-    return json({ 
-      error: 'Cache management failed',
-      message: error instanceof Error ? error.message : 'Unknown error'
-    }, { status: 500 });
-  }
-};
-
-export const DELETE: RequestHandler = async () => {
-  try {
-    await clearAllCache();
-    return json({ 
-      success: true, 
-      message: 'All cache cleared successfully' 
-    });
-  } catch (error) {
-    console.error('Cache clear error:', error);
-    return json({ 
-      error: 'Failed to clear cache',
-      message: error instanceof Error ? error.message : 'Unknown error'
-    }, { status: 500 });
-  }
-}; 
\ No newline at end of file
diff --git a/src/routes/api/admin/cron/+server.ts b/src/routes/api/admin/cron/+server.ts
deleted file mode 100644
index de33b6d..0000000
--- a/src/routes/api/admin/cron/+server.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import { json } from '@sveltejs/kit';
-import type { RequestHandler } from './$types';
-
-// Cron removed; keep endpoint for compatibility
-export const GET: RequestHandler = async () => {
-  return json({ success: true, message: 'Cron removed; on-demand ingestion active.' });
-};
-
-export const POST: RequestHandler = async () => {
-  return json({ success: true, message: 'Cron removed; on-demand ingestion active.' });
-};
\ No newline at end of file
diff --git a/src/routes/api/admin/process-data/+server.ts b/src/routes/api/admin/process-data/+server.ts
deleted file mode 100644
index 2e71f7d..0000000
--- a/src/routes/api/admin/process-data/+server.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import { json } from '@sveltejs/kit';
-import type { RequestHandler } from './$types';
-import { DataProcessor } from '$lib/data-processor.js';
-
-export const POST: RequestHandler = async ({ request }) => {
-  try {
-    const body = await request.json();
-    const { date, purge = true } = body;
-
-    console.log('Starting data processing via API...');
-    
-    const processor = new DataProcessor();
-    const results = await processor.etl(date, purge);
-
-    return json({
-      success: true,
-      message: 'Data processing completed successfully',
-      results
-    });
-  } catch (error) {
-    console.error('Data processing failed:', error);
-    return json({
-      success: false,
-      message: 'Data processing failed',
-      error: error instanceof Error ? error.message : 'Unknown error'
-    }, { status: 500 });
-  }
-}; 
\ No newline at end of file