diff --git a/README.md b/README.md
index c610dd4..95a8265 100644
--- a/README.md
+++ b/README.md
@@ -135,15 +135,16 @@ and ready to be invoked.
 
 #### `OpenAPIRouter(options = {})`
 
-| Name          | Type(s)                           | Description                                                             | Examples                                                                   |
-| ------------- | --------------------------------- | ----------------------------------------------------------------------- | -------------------------------------------------------------------------- |
-| `base`        | `string`                          | prefixes all routes with this string                                    | `Router({ base: '/api' })`                                                 |
-| `routes`      | `array of routes`                 | array of manual routes for preloading                                   | [see documentation](https://github.com/kwhitley/itty-router#manual-routes) |
-| `schema`      | `object`                          | Object of the common OpenAPI customizations                             | [see documentation](#4-core-openapi-schema-customizations)                 |
-| `docs_url`    | `string` or `null` or `undefined` | Path for swagger docs, `null`: disabled, `undefined`: `/docs`           | `/docs`                                                                    |
-| `redoc_url`   | `string` or `null` or `undefined` | Path for redoc docs, `null`: disabled, `undefined`: `/redocs`           | `/redocs`                                                                  |
-| `openapi_url` | `string` or `null` or `undefined` | Path for openapi schema, `null`: disabled, `undefined`: `/openapi.json` | `/openapi.json`                                                            |
-| `aiPlugin`    | `object` or `undefined`           | Object that will be used to generate the `ai-plugin.json` schema        | [see schema bellow](#aiplugin)                                             |
+| Name                     | Type(s)                           | Description                                                                            | Examples                                                                   |
+| ------------------------ | --------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------- |
+| `base`                   | `string`                          | prefixes all routes with this string                                                   | `Router({ base: '/api' })`                                                 |
+| `routes`                 | `array of routes`                 | array of manual routes for preloading                                                  | [see documentation](https://github.com/kwhitley/itty-router#manual-routes) |
+| `schema`                 | `object`                          | Object of the common OpenAPI customizations                                            | [see documentation](#4-core-openapi-schema-customizations)                 |
+| `docs_url`               | `string` or `null` or `undefined` | Path for swagger docs, `null`: disabled, `undefined`: `/docs`                          | `/docs`                                                                    |
+| `redoc_url`              | `string` or `null` or `undefined` | Path for redoc docs, `null`: disabled, `undefined`: `/redocs`                          | `/redocs`                                                                  |
+| `openapi_url`            | `string` or `null` or `undefined` | Path for openapi schema, `null`: disabled, `undefined`: `/openapi.json`                | `/openapi.json`                                                            |
+| `raiseUnknownParameters` | `boolean`                         | This will raise validation errors when an endpoint received an unknown query parameter | true                                                                       |
+| `aiPlugin`               | `object` or `undefined`           | Object that will be used to generate the `ai-plugin.json` schema                       | [see schema bellow](#aiplugin)                                             |
 
 #### `aiPlugin`
 
diff --git a/src/openapi.ts b/src/openapi.ts
index 64ea6ba..64af871 100644
--- a/src/openapi.ts
+++ b/src/openapi.ts
@@ -14,6 +14,7 @@ export function OpenAPIRouter(options?: RouterOptions): OpenAPIRouterSchema {
       title: options?.schema?.info?.title || 'OpenAPI',
       version: options?.schema?.info?.version || '1.0',
     },
+    raiseUnknownParameters: options?.raiseUnknownParameters, // TODO: turn this true by default in the future
     ...options?.schema,
   }
 
@@ -104,7 +105,10 @@ export function OpenAPIRouter(options?: RouterOptions): OpenAPIRouterSchema {
             }
 
             if (handler.isRoute) {
-              return (...params: any[]) => new handler().execute(...params)
+              return (...params: any[]) =>
+                new handler({
+                  raiseUnknownParameters: openapiConfig.raiseUnknownParameters,
+                }).execute(...params)
             }
 
             return handler
diff --git a/src/route.ts b/src/route.ts
index 62dc930..d2d8996 100644
--- a/src/route.ts
+++ b/src/route.ts
@@ -1,11 +1,24 @@
-import { OpenAPIRouteSchema, OpenAPISchema, RouteValidated } from './types'
+import { OpenAPIRouteSchema, OpenAPISchema, RouteOptions, RouteValidated } from './types'
 import { ApiException } from './exceptions'
-import { Body, extractParameter, extractQueryParameters, getFormatedParameters, Parameter, Resp } from './parameters'
+import {
+  Arr,
+  Body,
+  extractParameter,
+  extractQueryParameters,
+  getFormatedParameters,
+  Parameter,
+  Resp,
+} from './parameters'
 
 export class OpenAPIRoute implements OpenAPIRouteSchema {
   static isRoute = true
 
   static schema: OpenAPISchema
+  params: RouteOptions
+
+  constructor(params: RouteOptions) {
+    this.params = params
+  }
 
   static getSchema(): OpenAPISchema {
     return this.schema
@@ -94,6 +107,29 @@ export class OpenAPIRoute implements OpenAPIRouteSchema {
     const validatedObj: Record<string, any> = {}
     const validationErrors: Record<string, any> = {}
 
+    // check for query unknown parameters
+    if (this.params?.raiseUnknownParameters) {
+      for (const key of Object.keys(queryParams)) {
+        if (Array.isArray(params)) {
+          let exists = false
+          for (const param of params) {
+            if (param.params.name === key) {
+              exists = true
+              break
+            }
+          }
+
+          if (!exists) {
+            validationErrors[key] = `is an unknown parameter`
+          }
+        } else {
+          if (params[key] === undefined) {
+            validationErrors[key] = `is an unknown parameter`
+          }
+        }
+      }
+    }
+
     for (const [key, value] of Object.entries(params)) {
       // @ts-ignore
       const param: Parameter = value
diff --git a/src/types.ts b/src/types.ts
index 72d5345..5b48eea 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -30,6 +30,11 @@ export interface RouterOptions {
   redoc_url?: string
   openapi_url?: string
   aiPlugin?: AIPlugin
+  raiseUnknownParameters?: boolean
+}
+
+export interface RouteOptions {
+  raiseUnknownParameters: boolean
 }
 
 export interface OpenAPISchema {