diff --git a/.github/workflows/upload-openapi-spec.yml b/.github/workflows/upload-openapi-spec.yml
index 167cc2e8..df18af00 100644
--- a/.github/workflows/upload-openapi-spec.yml
+++ b/.github/workflows/upload-openapi-spec.yml
@@ -66,5 +66,7 @@ jobs:
           CLOUDFLARE_ACCESS_KEY: ${{ secrets.CLOUDFLARE_ACCESS_KEY }}
           CLOUDFLARE_SECRET_ACCESS_KEY: ${{ secrets.CLOUDFLARE_SECRET_ACCESS_KEY }}
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          CLOUDFLARE_ZONE_ID: ${{ secrets.CLOUDFLARE_ZONE_ID }}
           PUBLIC_SUPABASE_URL: ${{ secrets.PUBLIC_SUPABASE_URL }}
           PUBLIC_SUPABASE_ANON_KEY: ${{ secrets.PUBLIC_SUPABASE_ANON_KEY }}
diff --git a/apps/api/scripts/README.md b/apps/api/scripts/README.md
index e6076d7a..80f391b8 100644
--- a/apps/api/scripts/README.md
+++ b/apps/api/scripts/README.md
@@ -33,6 +33,14 @@ CLOUDFLARE_SECRET_ACCESS_KEY=your_secret_key
 CLOUDFLARE_ACCOUNT_ID=your_account_id
 ```
 
+Optional — purge Cloudflare CDN cache for `api.cdn.clsrio.com` (after R2 upload):
+
+```bash
+CLOUDFLARE_API_TOKEN=your_api_token   # Zone → Cache Purge → Purge
+CLOUDFLARE_ZONE_ID=your_zone_id
+OPENAPI_SKIP_CDN_PURGE=1              # skip purge when set
+```
+
 ## Output
 
 The script will:
@@ -43,6 +51,7 @@ The script will:
 4. **Upload to R2** (if credentials provided):
    - `openapi/public-api/openapi-YYYY-MM-DD.json` (dated version)
    - `openapi/public-api/openapi-latest.json` (latest version)
+5. **Purge Cloudflare CDN** (if `CLOUDFLARE_API_TOKEN` and `CLOUDFLARE_ZONE_ID` are set) for both public URLs, after upload
 
 ## GitHub Action Integration
 
@@ -63,11 +72,16 @@ The GitHub Action runs on:
    - `CLOUDFLARE_SECRET_ACCESS_KEY`
    - `CLOUDFLARE_ACCOUNT_ID`
 
+2. **Optional secrets** (CDN cache purge for `api.cdn.clsrio.com`):
+   - `CLOUDFLARE_API_TOKEN`
+   - `CLOUDFLARE_ZONE_ID`
+
 ## Features
 
 - ✅ Automatic OpenAPI spec generation from Hono routes
 - ✅ Local file generation for development
 - ✅ Cloudflare R2 upload with versioning
+- ✅ Optional Cloudflare CDN cache purge (after upload)
 - ✅ GitHub Action integration
 - ✅ Environment-specific deployments
 - ✅ PR previews and artifacts
diff --git a/apps/api/scripts/upload-openapi-spec.ts b/apps/api/scripts/upload-openapi-spec.ts
index f51e7594..6b9718fe 100644
--- a/apps/api/scripts/upload-openapi-spec.ts
+++ b/apps/api/scripts/upload-openapi-spec.ts
@@ -9,7 +9,65 @@ import { app } from '../src/app';
 import { env } from '@cio/core/config/env';
 import { generateSpecs } from 'hono-openapi';
 import { join } from 'path';
-import { enrichPublicApiOpenApiSpec } from '@cio/utils/openapi/public-api';
+import { enrichPublicApiOpenApiSpec, PUBLIC_API_OPENAPI_URL } from '@cio/utils/openapi/public-api';
+
+const OPENAPI_CDN_BASE_URL = PUBLIC_API_OPENAPI_URL.replace(/\/openapi-latest\.json$/, '');
+
+/** Cloudflare allows a limited number of URLs per purge request. */
+const PURGE_URL_BATCH = 30;
+
+/**
+ * Purge Cloudflare edge cache for public OpenAPI spec URLs.
+ * R2 is origin storage; purging fixes stale responses when the hostname is proxied through Cloudflare.
+ */
+async function purgeCloudflareCdnForUrls(urls: string[]): Promise<void> {
+  if (process.env.OPENAPI_SKIP_CDN_PURGE === '1' || process.env.OPENAPI_SKIP_CDN_PURGE === 'true') {
+    console.log('Skipping Cloudflare CDN purge (OPENAPI_SKIP_CDN_PURGE is set).');
+    return;
+  }
+
+  const token = process.env.CLOUDFLARE_API_TOKEN;
+  const zoneId = process.env.CLOUDFLARE_ZONE_ID;
+
+  if (!token || !zoneId) {
+    console.log(
+      'Skipping Cloudflare CDN cache purge. Set CLOUDFLARE_API_TOKEN and CLOUDFLARE_ZONE_ID to purge after upload.'
+    );
+    return;
+  }
+
+  if (urls.length === 0) {
+    return;
+  }
+
+  const uniqueUrls = [...new Set(urls)];
+
+  for (let index = 0; index < uniqueUrls.length; index += PURGE_URL_BATCH) {
+    const batch = uniqueUrls.slice(index, index + PURGE_URL_BATCH);
+    const response = await fetch(`https://api.cloudflare.com/client/v4/zones/${zoneId}/purge_cache`, {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${token}`,
+        'Content-Type': 'application/json'
+      },
+      body: JSON.stringify({ files: batch })
+    });
+
+    const payload: unknown = await response.json().catch(() => ({}));
+
+    if (!response.ok) {
+      throw new Error(`Cloudflare CDN purge failed: ${response.status} ${JSON.stringify(payload)}`);
+    }
+
+    console.log(`Purged Cloudflare CDN cache for ${batch.length} URL(s).`);
+  }
+}
+
+function getOpenApiCdnUrls(uploadKey: string): string[] {
+  const datedFileName = uploadKey.split('/').pop()!;
+
+  return [PUBLIC_API_OPENAPI_URL, `${OPENAPI_CDN_BASE_URL}/${datedFileName}`];
+}
 
 interface UploadOptions {
   key: string;
@@ -152,18 +210,21 @@ class OpenAPISpecGenerator {
 
       if (this.s3Client) {
         const uploadKey = `openapi/public-api/openapi-${new Date().toISOString().split('T')[0]}.json`;
+        const cdnUrls = getOpenApiCdnUrls(uploadKey);
+
         await this.uploadToR2({
           key: uploadKey,
           content: spec,
           contentType: 'application/json'
         });
 
-        // Also upload as latest version
         await this.uploadToR2({
           key: 'openapi/public-api/openapi-latest.json',
           content: spec,
           contentType: 'application/json'
         });
+
+        await purgeCloudflareCdnForUrls(cdnUrls);
       }
 
       console.log('🎉 OpenAPI spec generation and upload completed successfully!');
@@ -189,6 +250,11 @@ Environment Variables Required for R2 Upload:
   CLOUDFLARE_ACCESS_KEY
   CLOUDFLARE_SECRET_ACCESS_KEY
   CLOUDFLARE_ACCOUNT_ID
+
+Optional — purge Cloudflare CDN cache for api.cdn.clsrio.com (after upload):
+  CLOUDFLARE_API_TOKEN   (Zone → Cache Purge → Purge)
+  CLOUDFLARE_ZONE_ID
+  OPENAPI_SKIP_CDN_PURGE=1 to skip purge
     `);
     return;
   }