diff --git a/.gitignore b/.gitignore
index 14885812..0c2c6ca1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,42 @@
-node_modules
+# Dependency directories
+node_modules/
+
+# Build output
+dist/
+build/
+
+# Environment files
 .env
-.env.funder
-*.pem
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Testing
+coverage/
+.nyc_output/
+
+# IDE specific files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Temporary files
+.DS_Store
+Thumbs.db
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Compiled TypeScript
+*.js
+*.js.map
+*.d.ts
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 7a9974d2..e0b71182 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,12 @@
         "axios": "^1.7.7",
         "crypto": "^1.0.1",
         "dotenv": "^16.4.5",
-        "express": "^4.21.0"
+        "express": "^4.21.0",
+        "express-validator": "^7.2.1"
+      },
+      "devDependencies": {
+        "@types/express": "^5.0.2",
+        "vitest": "^3.2.2"
       }
     },
     "node_modules/@_koii/create-task-cli": {
@@ -244,6 +249,431 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@esbuild/aix-ppc64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.5.tgz",
+      "integrity": "sha512-9o3TMmpmftaCMepOdA5k/yDw8SfInyzWWTjYTFCX3kPSDJMROQTb8jg+h9Cnwnmm1vOzvxN7gIfB5V2ewpjtGA==",
+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "aix"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.25.5.tgz",
+      "integrity": "sha512-AdJKSPeEHgi7/ZhuIPtcQKr5RQdo6OO2IL87JkianiMYMPbCtot9fxPbrMiBADOWWm3T2si9stAiVsGbTQFkbA==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.25.5.tgz",
+      "integrity": "sha512-VGzGhj4lJO+TVGV1v8ntCZWJktV7SGCs3Pn1GRWI1SBFtRALoomm8k5E9Pmwg3HOAal2VDc2F9+PM/rEY6oIDg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-x64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.25.5.tgz",
+      "integrity": "sha512-D2GyJT1kjvO//drbRT3Hib9XPwQeWd9vZoBJn+bu/lVsOZ13cqNdDeqIF/xQ5/VmWvMduP6AmXvylO/PIc2isw==",
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+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/darwin-arm64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.25.5.tgz",
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/darwin-x64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-x64/-/darwin-x64-0.25.5.tgz",
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+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">=18"
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+    },
+    "node_modules/@esbuild/freebsd-arm64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-arm64/-/freebsd-arm64-0.25.5.tgz",
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": ">=18"
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+    },
+    "node_modules/@esbuild/freebsd-x64": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-x64/-/freebsd-x64-0.25.5.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
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+      }
+    },
+    "node_modules/@esbuild/linux-arm": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm/-/linux-arm-0.25.5.tgz",
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+        "arm"
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+      ],
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+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
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+    },
+    "node_modules/@esbuild/linux-ia32": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-ia32/-/linux-ia32-0.25.5.tgz",
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+        "ia32"
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
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+    },
+    "node_modules/@esbuild/linux-loong64": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-loong64/-/linux-loong64-0.25.5.tgz",
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+        "loong64"
+      ],
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+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
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+      }
+    },
+    "node_modules/@esbuild/linux-mips64el": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-mips64el/-/linux-mips64el-0.25.5.tgz",
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+        "mips64el"
+      ],
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+      "optional": true,
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+        "linux"
+      ],
+      "engines": {
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+    },
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-ppc64/-/linux-ppc64-0.25.5.tgz",
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+        "ppc64"
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+      "optional": true,
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+        "linux"
+      ],
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+    },
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-riscv64/-/linux-riscv64-0.25.5.tgz",
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+        "riscv64"
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-s390x/-/linux-s390x-0.25.5.tgz",
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+        "s390x"
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=18"
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+      "resolved": "https://registry.npmjs.org/@esbuild/linux-x64/-/linux-x64-0.25.5.tgz",
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+      "optional": true,
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+        "linux"
+      ],
+      "engines": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/netbsd-arm64/-/netbsd-arm64-0.25.5.tgz",
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+      "optional": true,
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+      ],
+      "engines": {
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+      "optional": true,
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+      ],
+      "engines": {
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "openbsd"
+      ],
+      "engines": {
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+    },
+    "node_modules/@esbuild/sunos-x64": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/sunos-x64/-/sunos-x64-0.25.5.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "sunos"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-arm64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.25.5.tgz",
+      "integrity": "sha512-O2S7SNZzdcFG7eFKgvwUEZ2VG9D/sn/eIiz8XRZ1Q/DO5a3s76Xv0mdBzVM5j5R639lXQmPmSo0iRpHqUUrsxw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-ia32": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.25.5.tgz",
+      "integrity": "sha512-onOJ02pqs9h1iMJ1PQphR+VZv8qBMQ77Klcsqv9CNW2w6yLqoURLcgERAIurY6QE63bbLuqgP9ATqajFLK5AMQ==",
+      "cpu": [
+        "ia32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-x64": {
+      "version": "0.25.5",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-x64/-/win32-x64-0.25.5.tgz",
+      "integrity": "sha512-TXv6YnJ8ZMVdX+SXWVBo/0p8LTcrUYngpWjvm91TMjjBQii7Oz11Lw5lbDV5Y0TzuhSJHwiH4hEtC1I42mMS0g==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@ethersproject/bytes": {
       "version": "5.7.0",
       "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.7.0.tgz",
@@ -337,6 +767,13 @@
         "multiformats": "^9.5.4"
       }
     },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+      "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@multiformats/murmur3": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@multiformats/murmur3/-/murmur3-1.1.3.tgz",
@@ -447,6 +884,286 @@
       "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.0.tgz",
       "integrity": "sha512-Vvn3zZrhQZkkBE8LSuW3em98c0FwgO4nxzv6OdSxPKJIEKY2bGbHn+mhGIPerzI4twdxaP8/0+06HBpwf345Lw=="
     },
+    "node_modules/@rollup/rollup-android-arm-eabi": {
+      "version": "4.41.1",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.41.1.tgz",
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+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-android-arm64": {
+      "version": "4.41.1",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.41.1.tgz",
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+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-darwin-arm64": {
+      "version": "4.41.1",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-arm64/-/rollup-darwin-arm64-4.41.1.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
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+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-x64/-/rollup-darwin-x64-4.41.1.tgz",
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+        "esbuild": "^0.25.0",
+        "fdir": "^6.4.4",
+        "picomatch": "^4.0.2",
+        "postcss": "^8.5.3",
+        "rollup": "^4.34.9",
+        "tinyglobby": "^0.2.13"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
+        "jiti": ">=1.21.0",
+        "less": "*",
+        "lightningcss": "^1.21.0",
+        "sass": "*",
+        "sass-embedded": "*",
+        "stylus": "*",
+        "sugarss": "*",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "lightningcss": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/yaml": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.0.tgz",
+      "integrity": "sha512-4lLa/EcQCB0cJkyts+FpIRx5G/llPxfP6VQU5KByHEhLxY3IJCH0f0Hy1MHI8sClTvsIb8qwRJ6R/ZdlDJ/leQ==",
+      "dev": true,
+      "license": "ISC",
+      "optional": true,
+      "peer": true,
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14.6"
+      }
+    },
     "node_modules/w3name": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/w3name/-/w3name-1.0.8.tgz",
@@ -4659,6 +6323,23 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/ws": {
       "version": "7.5.10",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.10.tgz",
diff --git a/package.json b/package.json
index 88840d66..d292ca74 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,11 @@
     "axios": "^1.7.7",
     "crypto": "^1.0.1",
     "dotenv": "^16.4.5",
-    "express": "^4.21.0"
+    "express": "^4.21.0",
+    "express-validator": "^7.2.1"
+  },
+  "devDependencies": {
+    "@types/express": "^5.0.2",
+    "vitest": "^3.2.2"
   }
 }
diff --git a/src/middleware/searchValidation.ts b/src/middleware/searchValidation.ts
new file mode 100644
index 00000000..088171a5
--- /dev/null
+++ b/src/middleware/searchValidation.ts
@@ -0,0 +1,86 @@
+import { Request, Response, NextFunction } from 'express';
+import { query, validationResult } from 'express-validator';
+
+/**
+ * Sanitization and validation rules for search queries
+ */
+export const searchValidationRules = [
+  // Validate and sanitize search query
+  query('q')
+    .optional()
+    .trim()
+    .escape()
+    .isLength({ min: 1, max: 100 })
+    .withMessage('Search query must be between 1 and 100 characters'),
+
+  // Validate category (if provided)
+  query('category')
+    .optional()
+    .trim()
+    .escape()
+    .custom((value) => {
+      const validCategories = ['makeup', 'skincare', 'haircare', 'fragrance'];
+      if (value && !validCategories.includes(value.toLowerCase())) {
+        throw new Error('Invalid category');
+      }
+      return true;
+    }),
+
+  // Validate price range 
+  query('minPrice')
+    .optional()
+    .isFloat({ min: 0 })
+    .withMessage('Minimum price must be a non-negative number'),
+
+  query('maxPrice')
+    .optional()
+    .isFloat({ min: 0 })
+    .withMessage('Maximum price must be a non-negative number')
+    .custom((value, { req }) => {
+      const minPrice = req.query.minPrice ? parseFloat(req.query.minPrice) : null;
+      const maxPrice = parseFloat(value);
+      
+      if (minPrice !== null && maxPrice < minPrice) {
+        throw new Error('Maximum price must be greater than or equal to minimum price');
+      }
+      return true;
+    }),
+
+  // Validate pagination parameters
+  query('page')
+    .optional()
+    .isInt({ min: 1 })
+    .withMessage('Page must be a positive integer'),
+
+  query('limit')
+    .optional()
+    .isInt({ min: 1, max: 100 })
+    .withMessage('Limit must be between 1 and 100')
+];
+
+/**
+ * Middleware to handle validation errors
+ * @param req Express request object
+ * @param res Express response object
+ * @param next Express next middleware function
+ */
+export const validateSearchQuery = (req: Request, res: Response, next: NextFunction) => {
+  const errors = validationResult(req);
+  
+  if (!errors.isEmpty()) {
+    return res.status(400).json({
+      errors: errors.array().map(err => ({
+        field: err.param || err.path,
+        message: err.msg
+      }))
+    });
+  }
+  
+  next();
+};
+
+// Combine validation rules and error handler
+export const searchQueryValidation = [
+  ...searchValidationRules,
+  validateSearchQuery
+];
\ No newline at end of file
diff --git a/tests/searchValidation.test.ts b/tests/searchValidation.test.ts
new file mode 100644
index 00000000..9f140a22
--- /dev/null
+++ b/tests/searchValidation.test.ts
@@ -0,0 +1,79 @@
+import { describe, it, expect } from 'vitest';
+import { validationResult } from 'express-validator';
+import { searchValidationRules } from '../src/middleware/searchValidation';
+
+describe('Search Query Validation', () => {
+  // Custom validation function
+  const validateQuery = async (query: any) => {
+    const req = { query } as any;
+    
+    for (const rule of searchValidationRules) {
+      await rule.run(req);
+    }
+    
+    return validationResult(req);
+  };
+
+  it('should pass validation for valid search query', async () => {
+    const result = await validateQuery({
+      q: 'lipstick',
+      category: 'makeup',
+      minPrice: '10.00',
+      maxPrice: '50.00',
+      page: '1',
+      limit: '20'
+    });
+    expect(result.isEmpty()).toBe(true);
+  });
+
+  it('should reject search query with invalid category', async () => {
+    const result = await validateQuery({
+      category: 'invalid-category'
+    });
+    expect(result.isEmpty()).toBe(false);
+    const errors = result.array();
+    expect(errors[0].msg).toBe('Invalid category');
+  });
+
+  it('should reject search query with negative prices', async () => {
+    const result = await validateQuery({
+      minPrice: '-10',
+      maxPrice: '-5'
+    });
+    expect(result.isEmpty()).toBe(false);
+    const errors = result.array();
+    expect(errors.some(e => e.msg === 'Minimum price must be a non-negative number')).toBe(true);
+  });
+
+  it('should reject search query with max price less than min price', async () => {
+    const result = await validateQuery({
+      minPrice: '50',
+      maxPrice: '20'
+    });
+    expect(result.isEmpty()).toBe(false);
+    const errors = result.array();
+    expect(errors[0].msg).toBe('Maximum price must be greater than or equal to minimum price');
+  });
+
+  it('should reject search query with overly long search term', async () => {
+    const result = await validateQuery({
+      q: 'a'.repeat(101)
+    });
+    expect(result.isEmpty()).toBe(false);
+    const errors = result.array();
+    expect(errors[0].msg).toBe('Search query must be between 1 and 100 characters');
+  });
+
+  it('should reject search query with invalid page or limit', async () => {
+    const result = await validateQuery({
+      page: '-1',
+      limit: '0'
+    });
+    expect(result.isEmpty()).toBe(false);
+    const errors = result.array();
+    expect(errors.some(e => 
+      e.msg === 'Page must be a positive integer' || 
+      e.msg === 'Limit must be between 1 and 100'
+    )).toBe(true);
+  });
+});
\ No newline at end of file