diff --git a/Dockerfile b/Dockerfile
index 87fb782..4ebd247 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,5 +10,6 @@ RUN pnpm install
 COPY . .
 
 RUN pnpm run build
+EXPOSE 3000
 
 CMD [ "pnpm", "start:dev" ]
\ No newline at end of file
diff --git a/package.json b/package.json
index 7a28ad1..84c35cc 100644
--- a/package.json
+++ b/package.json
@@ -28,9 +28,12 @@
     "@nestjs/swagger": "^7.4.2",
     "@nestjs/typeorm": "^10.0.2",
     "axios": "^1.7.7",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
     "moralis": "^2.27.2",
     "nodemailer": "^6.9.15",
     "pg": "^8.13.0",
+    "rate-limiter-flexible": "^5.0.3",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.1",
     "typeorm": "^0.3.20"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6e9f3c9..922ec2e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -10,28 +10,34 @@ importers:
     dependencies:
       '@nestjs/common':
         specifier: ^10.0.0
-        version: 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
+        version: 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       '@nestjs/config':
         specifier: ^3.2.3
-        version: 3.2.3(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(rxjs@7.8.1)
+        version: 3.2.3(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(rxjs@7.8.1)
       '@nestjs/core':
         specifier: ^10.0.0
-        version: 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+        version: 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       '@nestjs/platform-express':
         specifier: ^10.0.0
-        version: 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
+        version: 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
       '@nestjs/schedule':
         specifier: ^4.1.1
-        version: 4.1.1(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))
+        version: 4.1.1(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))
       '@nestjs/swagger':
         specifier: ^7.4.2
-        version: 7.4.2(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)
+        version: 7.4.2(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)
       '@nestjs/typeorm':
         specifier: ^10.0.2
-        version: 10.0.2(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)(rxjs@7.8.1)(typeorm@0.3.20(pg@8.13.0)(ts-node@10.9.2(@types/node@20.16.11)(typescript@5.6.3)))
+        version: 10.0.2(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)(rxjs@7.8.1)(typeorm@0.3.20(pg@8.13.0)(ts-node@10.9.2(@types/node@20.16.11)(typescript@5.6.3)))
       axios:
         specifier: ^1.7.7
         version: 1.7.7
+      class-transformer:
+        specifier: ^0.5.1
+        version: 0.5.1
+      class-validator:
+        specifier: ^0.14.1
+        version: 0.14.1
       moralis:
         specifier: ^2.27.2
         version: 2.27.2
@@ -41,6 +47,9 @@ importers:
       pg:
         specifier: ^8.13.0
         version: 8.13.0
+      rate-limiter-flexible:
+        specifier: ^5.0.3
+        version: 5.0.3
       reflect-metadata:
         specifier: ^0.2.0
         version: 0.2.2
@@ -59,7 +68,7 @@ importers:
         version: 10.1.4(chokidar@3.6.0)(typescript@5.6.3)
       '@nestjs/testing':
         specifier: ^10.0.0
-        version: 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4))
+        version: 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4))
       '@types/express':
         specifier: ^4.17.17
         version: 4.17.21
@@ -848,6 +857,9 @@ packages:
   '@types/supertest@6.0.2':
     resolution: {integrity: sha512-137ypx2lk/wTQbW6An6safu9hXmajAifU/s7szAHLN/FeIm5w7yR0Wkl9fdJMRSHwOn4HLAI0DaB2TOORuhPDg==}
 
+  '@types/validator@13.12.2':
+    resolution: {integrity: sha512-6SlHBzUW8Jhf3liqrGGXyTJSIFe4nqlJ5A5KaMZ2l/vbM3Wh3KSybots/wfWVzNLK4D1NZluDlSQIbIEPx6oyA==}
+
   '@types/yargs-parser@21.0.3':
     resolution: {integrity: sha512-I4q9QU9MQv4oEOz4tAHJtNz1cwuLxn2F3xcc2iV5WdqLPpUnj30aUuxt1mAxYTG+oe8CZMV/+6rU4S4gRDzqtQ==}
 
@@ -1258,6 +1270,12 @@ packages:
   cjs-module-lexer@1.4.1:
     resolution: {integrity: sha512-cuSVIHi9/9E/+821Qjdvngor+xpnlwnuwIyZOaLmHBVdXL+gP+I6QQB9VkO7RI77YIcTV+S1W9AreJ5eN63JBA==}
 
+  class-transformer@0.5.1:
+    resolution: {integrity: sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw==}
+
+  class-validator@0.14.1:
+    resolution: {integrity: sha512-2VEG9JICxIqTpoK1eMzZqaV+u/EiwEJkMGzTrZf6sU/fwsnOITVgYJ8yojSy6CaXtO9V0Cc6ZQZ8h8m4UBuLwQ==}
+
   cli-cursor@3.1.0:
     resolution: {integrity: sha512-I/zHAwsKf9FqGoXM4WWRACob9+SNukZTd94DWF57E4toouRulbCxcUh6RKUEOQlYTHJnzkPMySvPNaaSLNfLZw==}
     engines: {node: '>=8'}
@@ -2239,6 +2257,9 @@ packages:
     resolution: {integrity: sha512-+bT2uH4E5LGE7h/n3evcS/sQlJXCpIp6ym8OWJ5eV6+67Dsql/LaaT7qJBAt2rzfoa/5QBGBhxDix1dMt2kQKQ==}
     engines: {node: '>= 0.8.0'}
 
+  libphonenumber-js@1.11.11:
+    resolution: {integrity: sha512-mF3KaORjJQR6JBNcOkluDcJKhtoQT4VTLRMrX1v/wlBayL4M8ybwEDeryyPcrSEJmD0rVwHUbBarpZwN5NfPFQ==}
+
   lines-and-columns@1.2.4:
     resolution: {integrity: sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg==}
 
@@ -2692,6 +2713,9 @@ packages:
     resolution: {integrity: sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==}
     engines: {node: '>= 0.6'}
 
+  rate-limiter-flexible@5.0.3:
+    resolution: {integrity: sha512-lWx2y8NBVlTOLPyqs+6y7dxfEpT6YFqKy3MzWbCy95sTTOhOuxufP2QvRyOHpfXpB9OUJPbVLybw3z3AVAS5fA==}
+
   raw-body@2.5.2:
     resolution: {integrity: sha512-8zGqypfENjCIqGhgXToC8aB2r7YrBX+AQAfIPs/Mlk+BtPTztOvTS01NRW/3Eh60J+a48lt8qsCzirQ6loCVfA==}
     engines: {node: '>= 0.8'}
@@ -3244,6 +3268,10 @@ packages:
     resolution: {integrity: sha512-kiGUalWN+rgBJ/1OHZsBtU4rXZOfj/7rKQxULKlIzwzQSvMJUUNgPwJEEh7gU6xEVxC0ahoOBvN2YI8GH6FNgA==}
     engines: {node: '>=10.12.0'}
 
+  validator@13.12.0:
+    resolution: {integrity: sha512-c1Q0mCiPlgdTVVVIJIrBuxNicYE+t/7oKeI9MWLj3fh/uq2Pxh/3eeWbVZ4OcGW1TUf53At0njHw5SMdA3tmMg==}
+    engines: {node: '>= 0.10'}
+
   vary@1.1.2:
     resolution: {integrity: sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==}
     engines: {node: '>= 0.8'}
@@ -4127,25 +4155,28 @@ snapshots:
       - uglify-js
       - webpack-cli
 
-  '@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)':
+  '@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)':
     dependencies:
       iterare: 1.2.1
       reflect-metadata: 0.2.2
       rxjs: 7.8.1
       tslib: 2.7.0
       uid: 2.0.2
+    optionalDependencies:
+      class-transformer: 0.5.1
+      class-validator: 0.14.1
 
-  '@nestjs/config@3.2.3(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(rxjs@7.8.1)':
+  '@nestjs/config@3.2.3(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(rxjs@7.8.1)':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       dotenv: 16.4.5
       dotenv-expand: 10.0.0
       lodash: 4.17.21
       rxjs: 7.8.1
 
-  '@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)':
+  '@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       '@nuxtjs/opencollective': 0.3.2
       fast-safe-stringify: 2.1.1
       iterare: 1.2.1
@@ -4155,19 +4186,22 @@ snapshots:
       tslib: 2.7.0
       uid: 2.0.2
     optionalDependencies:
-      '@nestjs/platform-express': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
+      '@nestjs/platform-express': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
     transitivePeerDependencies:
       - encoding
 
-  '@nestjs/mapped-types@2.0.5(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)':
+  '@nestjs/mapped-types@2.0.5(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       reflect-metadata: 0.2.2
+    optionalDependencies:
+      class-transformer: 0.5.1
+      class-validator: 0.14.1
 
-  '@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)':
+  '@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       body-parser: 1.20.3
       cors: 2.8.5
       express: 4.21.0
@@ -4176,10 +4210,10 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@nestjs/schedule@4.1.1(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))':
+  '@nestjs/schedule@4.1.1(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       cron: 3.1.7
       uuid: 10.0.0
 
@@ -4205,30 +4239,33 @@ snapshots:
     transitivePeerDependencies:
       - chokidar
 
-  '@nestjs/swagger@7.4.2(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)':
+  '@nestjs/swagger@7.4.2(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)':
     dependencies:
       '@microsoft/tsdoc': 0.15.0
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/mapped-types': 2.0.5(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/mapped-types': 2.0.5(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)
       js-yaml: 4.1.0
       lodash: 4.17.21
       path-to-regexp: 3.3.0
       reflect-metadata: 0.2.2
       swagger-ui-dist: 5.17.14
+    optionalDependencies:
+      class-transformer: 0.5.1
+      class-validator: 0.14.1
 
-  '@nestjs/testing@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4))':
+  '@nestjs/testing@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4))':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       tslib: 2.7.0
     optionalDependencies:
-      '@nestjs/platform-express': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
+      '@nestjs/platform-express': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4)
 
-  '@nestjs/typeorm@10.0.2(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)(rxjs@7.8.1)(typeorm@0.3.20(pg@8.13.0)(ts-node@10.9.2(@types/node@20.16.11)(typescript@5.6.3)))':
+  '@nestjs/typeorm@10.0.2(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/core@10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1))(reflect-metadata@0.2.2)(rxjs@7.8.1)(typeorm@0.3.20(pg@8.13.0)(ts-node@10.9.2(@types/node@20.16.11)(typescript@5.6.3)))':
     dependencies:
-      '@nestjs/common': 10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1)
-      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/common': 10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1)
+      '@nestjs/core': 10.4.4(@nestjs/common@10.4.4(class-transformer@0.5.1)(class-validator@0.14.1)(reflect-metadata@0.2.2)(rxjs@7.8.1))(@nestjs/platform-express@10.4.4)(reflect-metadata@0.2.2)(rxjs@7.8.1)
       reflect-metadata: 0.2.2
       rxjs: 7.8.1
       typeorm: 0.3.20(pg@8.13.0)(ts-node@10.9.2(@types/node@20.16.11)(typescript@5.6.3))
@@ -4424,6 +4461,8 @@ snapshots:
       '@types/methods': 1.1.4
       '@types/superagent': 8.1.9
 
+  '@types/validator@13.12.2': {}
+
   '@types/yargs-parser@21.0.3': {}
 
   '@types/yargs@17.0.33':
@@ -4927,6 +4966,14 @@ snapshots:
 
   cjs-module-lexer@1.4.1: {}
 
+  class-transformer@0.5.1: {}
+
+  class-validator@0.14.1:
+    dependencies:
+      '@types/validator': 13.12.2
+      libphonenumber-js: 1.11.11
+      validator: 13.12.0
+
   cli-cursor@3.1.0:
     dependencies:
       restore-cursor: 3.1.0
@@ -6187,6 +6234,8 @@ snapshots:
       prelude-ls: 1.2.1
       type-check: 0.4.0
 
+  libphonenumber-js@1.11.11: {}
+
   lines-and-columns@1.2.4: {}
 
   loader-runner@4.3.0: {}
@@ -6590,6 +6639,8 @@ snapshots:
 
   range-parser@1.2.1: {}
 
+  rate-limiter-flexible@5.0.3: {}
+
   raw-body@2.5.2:
     dependencies:
       bytes: 3.1.2
@@ -7086,6 +7137,8 @@ snapshots:
       '@types/istanbul-lib-coverage': 2.0.6
       convert-source-map: 2.0.0
 
+  validator@13.12.0: {}
+
   vary@1.1.2: {}
 
   walker@1.0.8:
diff --git a/src/alert/alert.controller.ts b/src/alert/alert.controller.ts
index 27e3b8b..2d3ed31 100644
--- a/src/alert/alert.controller.ts
+++ b/src/alert/alert.controller.ts
@@ -1,6 +1,13 @@
-import { Controller, Post, Body } from '@nestjs/common';
+import {
+  Controller,
+  Post,
+  Body,
+  ValidationPipe,
+  UsePipes,
+} from '@nestjs/common';
 import { AlertService } from './alert.service';
-import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { CreateAlertDto } from './dto/create-alert.dto';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
 
 @ApiTags('alerts')
 @Controller('alerts')
@@ -9,13 +16,17 @@ export class AlertController {
 
   @Post()
   @ApiOperation({ summary: 'Create a new price alert' })
-  async createAlert(
-    @Body() alertData: { chain: string; targetPrice: number; email: string },
-  ) {
+  @ApiResponse({
+    status: 201,
+    description: 'The alert has been successfully created.',
+  })
+  @ApiResponse({ status: 400, description: 'Invalid input data.' })
+  @UsePipes(new ValidationPipe({ transform: true }))
+  async createAlert(@Body() createAlertDto: CreateAlertDto) {
     return this.alertService.createAlert(
-      alertData.chain,
-      alertData.targetPrice,
-      alertData.email,
+      createAlertDto.chain,
+      createAlertDto.targetPrice,
+      createAlertDto.email,
     );
   }
 }
diff --git a/src/alert/alert.service.ts b/src/alert/alert.service.ts
index 9746a2c..0ab0d13 100644
--- a/src/alert/alert.service.ts
+++ b/src/alert/alert.service.ts
@@ -1,4 +1,4 @@
-import { Injectable, Logger } from '@nestjs/common';
+import { Injectable, Logger, HttpException, HttpStatus } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
 import { Alert } from './entities/alert.entity';
@@ -32,8 +32,16 @@ export class AlertService {
     targetPrice: number,
     email: string,
   ): Promise<Alert> {
-    const alert = this.alertRepository.create({ chain, targetPrice, email });
-    return this.alertRepository.save(alert);
+    try {
+      const alert = this.alertRepository.create({ chain, targetPrice, email });
+      return await this.alertRepository.save(alert);
+    } catch (error) {
+      this.logger.error(`Error creating alert: ${error.message}`, error.stack);
+      throw new HttpException(
+        'Failed to create alert',
+        HttpStatus.INTERNAL_SERVER_ERROR,
+      );
+    }
   }
 
   async checkAlerts() {
@@ -50,7 +58,7 @@ export class AlertService {
         }
       }
     } catch (error) {
-      this.logger.error('Error checking alerts', error.stack);
+      this.logger.error(`Error checking alerts: ${error.message}`, error.stack);
     }
   }
 
@@ -76,7 +84,7 @@ export class AlertService {
         }
       } catch (error) {
         this.logger.error(
-          `Error checking price increase for ${chain}`,
+          `Error checking price increase for ${chain}: ${error.message}`,
           error.stack,
         );
       }
@@ -85,7 +93,10 @@ export class AlertService {
 
   private async getCurrentPrice(chain: string): Promise<number> {
     const prices = await this.priceService.getPricesLastHour(chain);
-    return prices[0]?.price || 0;
+    if (prices.length === 0) {
+      throw new Error(`No recent prices found for ${chain}`);
+    }
+    return prices[0].price;
   }
 
   private async sendAlertEmail(alert: Alert, currentPrice: number) {
@@ -115,7 +126,8 @@ export class AlertService {
       });
       this.logger.log(`Email sent to ${to}: ${subject}`);
     } catch (error) {
-      this.logger.error('Error sending email', error.stack);
+      this.logger.error(`Error sending email: ${error.message}`, error.stack);
+      throw new Error('Failed to send email');
     }
   }
 }
diff --git a/src/alert/dto/create-alert.dto.ts b/src/alert/dto/create-alert.dto.ts
index e379fd7..975f506 100644
--- a/src/alert/dto/create-alert.dto.ts
+++ b/src/alert/dto/create-alert.dto.ts
@@ -1 +1,20 @@
-export class CreateAlertDto {}
+import { IsString, IsNumber, IsEmail, IsIn } from 'class-validator';
+import { ApiProperty } from '@nestjs/swagger';
+
+export class CreateAlertDto {
+  @ApiProperty({
+    description: 'The blockchain to monitor',
+    enum: ['ethereum', 'polygon'],
+  })
+  @IsString()
+  @IsIn(['ethereum', 'polygon'])
+  chain: string;
+
+  @ApiProperty({ description: 'The target price to trigger the alert' })
+  @IsNumber()
+  targetPrice: number;
+
+  @ApiProperty({ description: 'The email address to send the alert to' })
+  @IsEmail()
+  email: string;
+}
diff --git a/src/app.module.ts b/src/app.module.ts
index 3677724..72f57e3 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -5,6 +5,8 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { ScheduleModule } from '@nestjs/schedule';
 import { PriceModule } from './price/price.module';
 import { AlertModule } from './alert/alert.module';
+import { HealthController } from './health/health.controller';
+import { ScheduledTasksService } from './scheduled-tasks.service';
 import configuration from './config/configuration';
 
 @Module({
@@ -31,5 +33,7 @@ import configuration from './config/configuration';
     PriceModule,
     AlertModule,
   ],
+  controllers: [HealthController],
+  providers: [ScheduledTasksService],
 })
 export class AppModule {}
diff --git a/src/common/http-exception.filter.ts b/src/common/http-exception.filter.ts
new file mode 100644
index 0000000..30b58c4
--- /dev/null
+++ b/src/common/http-exception.filter.ts
@@ -0,0 +1,42 @@
+import {
+  ExceptionFilter,
+  Catch,
+  ArgumentsHost,
+  HttpException,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Request, Response } from 'express';
+
+@Catch()
+export class HttpExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(HttpExceptionFilter.name);
+
+  catch(exception: unknown, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+    const status =
+      exception instanceof HttpException
+        ? exception.getStatus()
+        : HttpStatus.INTERNAL_SERVER_ERROR;
+
+    const message =
+      exception instanceof HttpException
+        ? exception.getResponse()
+        : 'Internal server error';
+
+    this.logger.error(
+      `Http Status: ${status} Error Message: ${JSON.stringify(message)}`,
+      exception instanceof Error ? exception.stack : undefined,
+      `${request.method} ${request.url}`,
+    );
+
+    response.status(status).json({
+      statusCode: status,
+      timestamp: new Date().toISOString(),
+      path: request.url,
+      message: message,
+    });
+  }
+}
diff --git a/src/common/rate-limiting.guard.ts b/src/common/rate-limiting.guard.ts
new file mode 100644
index 0000000..7582a51
--- /dev/null
+++ b/src/common/rate-limiting.guard.ts
@@ -0,0 +1,38 @@
+import {
+  Injectable,
+  CanActivate,
+  ExecutionContext,
+  HttpException,
+  HttpStatus,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { RateLimiterMemory } from 'rate-limiter-flexible';
+
+@Injectable()
+export class RateLimitingGuard implements CanActivate {
+  private rateLimiter: RateLimiterMemory;
+
+  constructor() {
+    this.rateLimiter = new RateLimiterMemory({
+      points: 10, // Number of points
+      duration: 1, // Per second
+    });
+  }
+
+  canActivate(
+    context: ExecutionContext,
+  ): boolean | Promise<boolean> | Observable<boolean> {
+    const request = context.switchToHttp().getRequest();
+    const key = request.ip;
+
+    return this.rateLimiter
+      .consume(key)
+      .then(() => true)
+      .catch(() => {
+        throw new HttpException(
+          'Too Many Requests',
+          HttpStatus.TOO_MANY_REQUESTS,
+        );
+      });
+  }
+}
diff --git a/src/health/health.controller.ts b/src/health/health.controller.ts
new file mode 100644
index 0000000..9dceaa1
--- /dev/null
+++ b/src/health/health.controller.ts
@@ -0,0 +1,13 @@
+import { Controller, Get } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
+
+@ApiTags('health')
+@Controller('health')
+export class HealthController {
+  @Get()
+  @ApiOperation({ summary: 'Check application health' })
+  @ApiResponse({ status: 200, description: 'Application is healthy' })
+  check() {
+    return { status: 'ok' };
+  }
+}
diff --git a/src/main.ts b/src/main.ts
index e2a554f..bcfbf70 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,14 +1,24 @@
+import { RateLimitingGuard } from './common/rate-limiting.guard';
 import { NestFactory } from '@nestjs/core';
-import { AppModule } from './app.module';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { ValidationPipe } from '@nestjs/common';
+import { AppModule } from './app.module';
+import { HttpExceptionFilter } from './common/http-exception.filter';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
 
+  app.useGlobalPipes(new ValidationPipe());
+  app.useGlobalFilters(new HttpExceptionFilter());
+  app.useGlobalGuards(new RateLimitingGuard());
+
   const config = new DocumentBuilder()
     .setTitle('Blockchain Price Tracker')
     .setDescription('API for tracking Ethereum and Polygon prices')
     .setVersion('1.0')
+    .addTag('prices')
+    .addTag('alerts')
+    .addTag('health')
     .build();
   const document = SwaggerModule.createDocument(app, config);
   SwaggerModule.setup('api', app, document);
diff --git a/src/price/price.service.ts b/src/price/price.service.ts
index 39d53d6..e5947f6 100644
--- a/src/price/price.service.ts
+++ b/src/price/price.service.ts
@@ -1,6 +1,6 @@
-import { Injectable, Logger } from '@nestjs/common';
+import { Injectable, Logger, HttpException, HttpStatus } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
-import { MoreThan, Repository } from 'typeorm';
+import { Repository, MoreThan } from 'typeorm';
 import { Price } from './entities/price.entity';
 import { ConfigService } from '@nestjs/config';
 import axios from 'axios';
@@ -28,7 +28,11 @@ export class PriceService {
         this.logger.log(`Saved ${chain} price: $${price}`);
       }
     } catch (error) {
-      this.logger.error('Error saving prices', error.stack);
+      this.logger.error(`Error saving prices: ${error.message}`, error.stack);
+      throw new HttpException(
+        'Failed to save prices',
+        HttpStatus.INTERNAL_SERVER_ERROR,
+      );
     }
   }
 
@@ -44,18 +48,23 @@ export class PriceService {
       });
       return parseFloat(response.data.usdPrice);
     } catch (error) {
-      this.logger.error(`Error fetching ${chain} price`, error.stack);
-      throw error;
+      this.logger.error(
+        `Error fetching ${chain} price: ${error.message}`,
+        error.stack,
+      );
+      throw new HttpException(
+        `Failed to fetch ${chain} price`,
+        HttpStatus.INTERNAL_SERVER_ERROR,
+      );
     }
   }
 
   private getAddress(chain: string): string {
-    // You might want to store these in a configuration file
     const addresses = {
       ethereum: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2', // WETH
       polygon: '0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270', // WMATIC
     };
-    return addresses[chain];
+    return addresses[chain] || '';
   }
 
   async getPricesLastHour(chain: string): Promise<Price[]> {