diff --git a/apps/e2e/src/__snapshots__/e2e.test.ts.snap b/apps/e2e/src/__snapshots__/e2e.test.ts.snap
index 756fbbea..50e54fb6 100644
--- a/apps/e2e/src/__snapshots__/e2e.test.ts.snap
+++ b/apps/e2e/src/__snapshots__/e2e.test.ts.snap
@@ -1,5 +1,41 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
+exports[`Basic GET caching > 3.0: GET dev/test-basic-openapi@b6e21206/getPost 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
+exports[`Basic GET caching > 3.1: GET dev/test-basic-openapi@b6e21206/getPost?postId=9 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
+exports[`Basic GET caching > 3.2: GET dev/test-basic-openapi@b6e21206/get_post?postId=9 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
 exports[`Basic OpenAPI getPost(1) > 0.0: GET dev/test-basic-openapi/getPost 1`] = `
 {
   "body": "quia et suscipit
@@ -71,3 +107,51 @@ nostrum rerum est autem sunt rem eveniet architecto",
   "userId": 1,
 }
 `;
+
+exports[`Bypass caching > 2.0: GET dev/test-basic-openapi@b6e21206/getPost 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
+exports[`Bypass caching > 2.1: GET dev/test-basic-openapi@b6e21206/getPost?postId=9 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
+exports[`Bypass caching > 2.2: GET dev/test-basic-openapi@b6e21206/get_post?postId=9 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
+
+exports[`Bypass caching > 2.3: GET dev/test-basic-openapi@b6e21206/get_post?postId=9 1`] = `
+{
+  "body": "consectetur animi nesciunt iure dolore
+enim quia ad
+veniam autem ut quam aut nobis
+et est aut quod aut provident voluptas autem voluptas",
+  "id": 9,
+  "title": "nesciunt iure omnis dolorem tempora et accusantium",
+  "userId": 1,
+}
+`;
diff --git a/apps/e2e/src/fixtures.ts b/apps/e2e/src/fixtures.ts
index bac0fbc8..f6b70cd1 100644
--- a/apps/e2e/src/fixtures.ts
+++ b/apps/e2e/src/fixtures.ts
@@ -125,5 +125,94 @@ export const fixtureSuites: E2ETestFixtureSuite[] = [
         }
       }
     ]
+  },
+  {
+    title: 'Bypass caching',
+    fixtures: [
+      {
+        path: 'dev/test-basic-openapi@b6e21206/getPost',
+        request: {
+          headers: {
+            pragma: 'no-cache'
+          },
+          searchParams: {
+            postId: 9
+          }
+        },
+        response: {
+          headers: {
+            'cf-cache-status': 'BYPASS'
+          }
+        }
+      },
+      {
+        path: 'dev/test-basic-openapi@b6e21206/getPost?postId=9',
+        request: {
+          headers: {
+            'cache-control': 'no-cache'
+          }
+        },
+        response: {
+          headers: {
+            'cf-cache-status': 'BYPASS'
+          }
+        }
+      },
+      {
+        path: 'dev/test-basic-openapi@b6e21206/get_post?postId=9',
+        request: {
+          headers: {
+            'cache-control': 'no-store'
+          }
+        },
+        response: {
+          headers: {
+            'cf-cache-status': 'BYPASS'
+          }
+        }
+      },
+      {
+        path: 'dev/test-basic-openapi@b6e21206/get_post?postId=9',
+        request: {
+          headers: {
+            'cache-control': 'max-age=0, must-revalidate, no-cache'
+          }
+        },
+        response: {
+          headers: {
+            'cf-cache-status': 'BYPASS'
+          }
+        }
+      }
+    ]
+  },
+  {
+    title: 'Basic GET caching',
+    fixtures: [
+      {
+        path: 'dev/test-basic-openapi@b6e21206/getPost',
+        request: {
+          searchParams: {
+            postId: 9
+          }
+        }
+      },
+      {
+        path: 'dev/test-basic-openapi@b6e21206/getPost?postId=9',
+        response: {
+          headers: {
+            'cf-cache-status': 'HIT'
+          }
+        }
+      },
+      {
+        path: 'dev/test-basic-openapi@b6e21206/get_post?postId=9',
+        response: {
+          headers: {
+            'cf-cache-status': 'HIT'
+          }
+        }
+      }
+    ]
   }
 ]
diff --git a/apps/gateway/src/worker.ts b/apps/gateway/src/worker.ts
index 2db3ad54..7658df96 100644
--- a/apps/gateway/src/worker.ts
+++ b/apps/gateway/src/worker.ts
@@ -137,15 +137,12 @@ export default {
     try {
       parsedEnv = parseEnv(env)
     } catch (err: any) {
-      // TODO: Better error handling
-      return new Response(
-        JSON.stringify({
-          error: err.message,
-          type: err.type,
-          code: err.code
-        }),
-        { status: 500 }
-      )
+      return new Response(JSON.stringify({ error: err.message }), {
+        status: 500,
+        headers: {
+          'content-type': 'application/json'
+        }
+      })
     }
 
     return app.fetch(request, parsedEnv, ctx)
diff --git a/packages/core/src/errors.ts b/packages/core/src/errors.ts
index d19d1ab7..8e7a3da3 100644
--- a/packages/core/src/errors.ts
+++ b/packages/core/src/errors.ts
@@ -33,9 +33,17 @@ export class HttpError extends BaseError {
   }
 }
 
-export class ZodValidationError extends BaseError {
-  constructor({ prefix, cause }: { prefix?: string; cause: unknown }) {
+export class ZodValidationError extends HttpError {
+  constructor({
+    statusCode,
+    prefix,
+    cause
+  }: {
+    statusCode?: ContentfulStatusCode
+    prefix?: string
+    cause: unknown
+  }) {
     const error = fromError(cause, { prefix })
-    super({ message: error.message, cause })
+    super({ message: error.message, cause, statusCode })
   }
 }
diff --git a/packages/core/src/utils.ts b/packages/core/src/utils.ts
index acb0aaea..1260606a 100644
--- a/packages/core/src/utils.ts
+++ b/packages/core/src/utils.ts
@@ -82,9 +82,11 @@ export function parseZodSchema<TSchema extends ZodType<any, any, any>>(
   schema: TSchema,
   input: unknown,
   {
-    error
+    error,
+    statusCode = 500
   }: {
     error?: string
+    statusCode?: ContentfulStatusCode
   } = {}
 ): z.infer<TSchema> {
   try {
@@ -92,7 +94,8 @@ export function parseZodSchema<TSchema extends ZodType<any, any, any>>(
   } catch (err) {
     throw new ZodValidationError({
       prefix: error,
-      cause: err
+      cause: err,
+      statusCode
     })
   }
 }
diff --git a/packages/openapi-utils/src/get-tools-from-openapi-spec.ts b/packages/openapi-utils/src/get-tools-from-openapi-spec.ts
index d9296792..8cfda9e5 100644
--- a/packages/openapi-utils/src/get-tools-from-openapi-spec.ts
+++ b/packages/openapi-utils/src/get-tools-from-openapi-spec.ts
@@ -191,12 +191,18 @@ export async function getToolsFromOpenAPISpec(
       const { tags } = operation
 
       tools.push(
-        parseZodSchema(toolSchema, {
-          name: operationNameSnakeCase,
-          description,
-          inputSchema: operationParamsJsonSchema,
-          outputSchema: operationResponseJsonSchema
-        })
+        parseZodSchema(
+          toolSchema,
+          {
+            name: operationNameSnakeCase,
+            description,
+            inputSchema: operationParamsJsonSchema,
+            outputSchema: operationResponseJsonSchema
+          },
+          {
+            statusCode: 400
+          }
+        )
       )
 
       toolToOperationMap[operationNameSnakeCase] = parseZodSchema(
@@ -207,6 +213,9 @@ export async function getToolsFromOpenAPISpec(
           path,
           parameterSources: operationParamsSources,
           tags
+        },
+        {
+          statusCode: 400
         }
       )
     }
diff --git a/packages/platform/src/parse-agentic-project-config.ts b/packages/platform/src/parse-agentic-project-config.ts
index cbbdccc3..2d8fb2dc 100644
--- a/packages/platform/src/parse-agentic-project-config.ts
+++ b/packages/platform/src/parse-agentic-project-config.ts
@@ -24,7 +24,10 @@ export function parseAgenticProjectConfig(
       : strict
         ? agenticProjectConfigSchema.strict()
         : agenticProjectConfigSchema,
-    inputConfig
+    inputConfig,
+    {
+      statusCode: 400
+    }
   ) as AgenticProjectConfig
 }
 
@@ -41,6 +44,9 @@ export function parseResolvedAgenticProjectConfig(
       : strict
         ? resolvedAgenticProjectConfigSchema.strict()
         : resolvedAgenticProjectConfigSchema,
-    inputConfig
+    inputConfig,
+    {
+      statusCode: 400
+    }
   ) as ResolvedAgenticProjectConfig
 }