diff --git a/package-lock.json b/package-lock.json
index d6e7325..3ed3089 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,9 +31,11 @@
         "@types/jest": "^29.5.11",
         "@types/node": "^24.0.0",
         "@types/pluralize": "^0.0.33",
+        "@types/supertest": "^7.2.0",
         "jest": "^29.7.0",
         "nodemon": "^3.1.0",
         "rimraf": "^5.0.5",
+        "supertest": "^7.2.2",
         "ts-jest": "^29.1.2",
         "tsx": "^4.20.0",
         "typescript": "^5.7.3"
@@ -1555,6 +1557,29 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@noble/hashes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "node_modules/@paralleldrive/cuid2": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/@paralleldrive/cuid2/-/cuid2-2.3.1.tgz",
+      "integrity": "sha512-XO7cAxhnTZl0Yggq6jOgjiOHhbgcO4NqFqwSmQpjK3b6TEE6Uj/jfSk6wzYyemh3+I0sHirKSetjQwn5cZktFw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.1.5"
+      }
+    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
@@ -1664,6 +1689,13 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/cookiejar": {
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/@types/cookiejar/-/cookiejar-2.1.5.tgz",
+      "integrity": "sha512-he+DHOWReW0nghN24E1WUqM0efK4kI9oTqDm6XmK8ZPe2djZ90BSNdGnIyCLzCPw7/pogPlGbzI2wHGGmi4O/Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/cors": {
       "version": "2.8.19",
       "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.19.tgz",
@@ -1763,6 +1795,13 @@
         "pretty-format": "^29.0.0"
       }
     },
+    "node_modules/@types/methods": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/@types/methods/-/methods-1.1.4.tgz",
+      "integrity": "sha512-ymXWVrDiCxTBE3+RIrrP533E70eA+9qu7zdWoHuOmGujkYtzf4HQF96b8nwHLqhuf4ykX61IGRIB38CC6/sImQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/mime": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz",
@@ -1834,6 +1873,30 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/superagent": {
+      "version": "8.1.9",
+      "resolved": "https://registry.npmjs.org/@types/superagent/-/superagent-8.1.9.tgz",
+      "integrity": "sha512-pTVjI73witn+9ILmoJdajHGW2jkSaOzhiFYF1Rd3EQ94kymLqB9PjD9ISg7WaALC7+dCHT0FGe9T2LktLq/3GQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/cookiejar": "^2.1.5",
+        "@types/methods": "^1.1.4",
+        "@types/node": "*",
+        "form-data": "^4.0.0"
+      }
+    },
+    "node_modules/@types/supertest": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@types/supertest/-/supertest-7.2.0.tgz",
+      "integrity": "sha512-uh2Lv57xvggst6lCqNdFAmDSvoMG7M/HDtX4iUCquxQ5EGPtaPM5PL5Hmi7LCvOG8db7YaCPNJEeoI8s/WzIQw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/methods": "^1.1.4",
+        "@types/superagent": "^8.1.0"
+      }
+    },
     "node_modules/@types/swagger-ui-express": {
       "version": "4.1.8",
       "resolved": "https://registry.npmjs.org/@types/swagger-ui-express/-/swagger-ui-express-4.1.8.tgz",
@@ -1977,6 +2040,20 @@
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
       "license": "MIT"
     },
+    "node_modules/asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/babel-jest": {
       "version": "29.7.0",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-29.7.0.tgz",
@@ -2539,6 +2616,19 @@
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
       "license": "MIT"
     },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/command-line-args": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/command-line-args/-/command-line-args-5.0.2.tgz",
@@ -2650,6 +2740,16 @@
         "node": ">=18"
       }
     },
+    "node_modules/component-emitter": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.1.tgz",
+      "integrity": "sha512-T0+barUSQRTUQASh8bx02dl+DhF54GtIDY13Y3m9oWTklKbb3Wv974meRpeZ3lp1JpLVECWWNHC4vaG2XHXouQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -2700,6 +2800,13 @@
       "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA==",
       "license": "MIT"
     },
+    "node_modules/cookiejar": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.4.tgz",
+      "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/cors": {
       "version": "2.8.6",
       "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.6.tgz",
@@ -2809,6 +2916,16 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -2838,6 +2955,17 @@
         "node": ">=8"
       }
     },
+    "node_modules/dezalgo": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/dezalgo/-/dezalgo-1.0.4.tgz",
+      "integrity": "sha512-rXSP0bf+5n0Qonsb+SVVfNfIsimO4HEtmnIpPHY8Q1UCzKlQrDMfdobr8nJOOsRgWCyMRqeSBQzmWUMq7zvVig==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "asap": "^2.0.0",
+        "wrappy": "1"
+      }
+    },
     "node_modules/diff-sequences": {
       "version": "29.6.3",
       "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-29.6.3.tgz",
@@ -2950,6 +3078,22 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/es-set-tostringtag": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/es-set-tostringtag/-/es-set-tostringtag-2.1.0.tgz",
+      "integrity": "sha512-j6vWzfrGVfyXxge+O0x5sh6cvxAog0a/4Rdd2K36zCMV5eJ+/+tOAngRO8cODMNWbVRdVlmGZQL2YS3yR8bIUA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.6",
+        "has-tostringtag": "^1.0.2",
+        "hasown": "^2.0.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/esbuild": {
       "version": "0.27.3",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.3.tgz",
@@ -3150,6 +3294,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/fast-safe-stringify": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz",
+      "integrity": "sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/fb-watchman": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/fb-watchman/-/fb-watchman-2.0.2.tgz",
@@ -3271,6 +3422,41 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/form-data": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.5.tgz",
+      "integrity": "sha512-8RipRLol37bNs2bhoV67fiTEvdTrbMUYcFTiy3+wuuOnUog2QBHCZWXDRijWQfAkhBj2Uf5UnVaiWwA5vdd82w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "es-set-tostringtag": "^2.1.0",
+        "hasown": "^2.0.2",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/formidable": {
+      "version": "3.5.4",
+      "resolved": "https://registry.npmjs.org/formidable/-/formidable-3.5.4.tgz",
+      "integrity": "sha512-YikH+7CUTOtP44ZTnUhR7Ic2UASBPOqmaRkRKxRbywPTe5VxF7RRCck4af9wutiZ/QKM5nME9Bie2fFaPz5Gug==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@paralleldrive/cuid2": "^2.2.2",
+        "dezalgo": "^1.0.4",
+        "once": "^1.4.0"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      },
+      "funding": {
+        "url": "https://ko-fi.com/tunnckoCore/commissions"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -3516,6 +3702,22 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-tostringtag": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/has-tostringtag/-/has-tostringtag-1.0.2.tgz",
+      "integrity": "sha512-NqADB8VjPFLM2V0VvHUewwwsw0ZWBaIdgo+ieHtK3hasLz4qeCRjYcqfB6AQrBggRKppKF8L52/VqdVsO47Dlw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-symbols": "^1.0.3"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/hasown": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.2.tgz",
@@ -6078,6 +6280,90 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/superagent": {
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-10.3.0.tgz",
+      "integrity": "sha512-B+4Ik7ROgVKrQsXTV0Jwp2u+PXYLSlqtDAhYnkkD+zn3yg8s/zjA2MeGayPoY/KICrbitwneDHrjSotxKL+0XQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "component-emitter": "^1.3.1",
+        "cookiejar": "^2.1.4",
+        "debug": "^4.3.7",
+        "fast-safe-stringify": "^2.1.1",
+        "form-data": "^4.0.5",
+        "formidable": "^3.5.4",
+        "methods": "^1.1.2",
+        "mime": "2.6.0",
+        "qs": "^6.14.1"
+      },
+      "engines": {
+        "node": ">=14.18.0"
+      }
+    },
+    "node_modules/superagent/node_modules/debug": {
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
+      "integrity": "sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ms": "^2.1.3"
+      },
+      "engines": {
+        "node": ">=6.0"
+      },
+      "peerDependenciesMeta": {
+        "supports-color": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/superagent/node_modules/mime": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.6.0.tgz",
+      "integrity": "sha512-USPkMeET31rOMiarsBNIHZKLGgvKc/LrjofAnBlOttf5ajRvqiRA8QsenbcooctK6d6Ts6aqZXBA+XbkKthiQg==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
+    "node_modules/superagent/node_modules/ms": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
+      "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/supertest": {
+      "version": "7.2.2",
+      "resolved": "https://registry.npmjs.org/supertest/-/supertest-7.2.2.tgz",
+      "integrity": "sha512-oK8WG9diS3DlhdUkcFn4tkNIiIbBx9lI2ClF8K+b2/m8Eyv47LSawxUzZQSNKUrVb2KsqeTDCcjAAVPYaSLVTA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cookie-signature": "^1.2.2",
+        "methods": "^1.1.2",
+        "superagent": "^10.3.0"
+      },
+      "engines": {
+        "node": ">=14.18.0"
+      }
+    },
+    "node_modules/supertest/node_modules/cookie-signature": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.2.2.tgz",
+      "integrity": "sha512-D76uU73ulSXrD1UXF4KE2TMxVVwhsnCgfAyTg9k8P6KGZjlXKrOLe4dJQKI3Bxi5wjesZoFXJWElNWBjPZMbhg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.6.0"
+      }
+    },
     "node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
diff --git a/package.json b/package.json
index 4985bb0..84048e8 100644
--- a/package.json
+++ b/package.json
@@ -46,9 +46,11 @@
     "@types/jest": "^29.5.11",
     "@types/node": "^24.0.0",
     "@types/pluralize": "^0.0.33",
+    "@types/supertest": "^7.2.0",
     "jest": "^29.7.0",
     "nodemon": "^3.1.0",
     "rimraf": "^5.0.5",
+    "supertest": "^7.2.2",
     "ts-jest": "^29.1.2",
     "tsx": "^4.20.0",
     "typescript": "^5.7.3"
diff --git a/tests/fixtures/types/user.ts b/tests/fixtures/types/user.ts
new file mode 100644
index 0000000..8166c7d
--- /dev/null
+++ b/tests/fixtures/types/user.ts
@@ -0,0 +1,7 @@
+// @endpoint
+export interface User {
+  id: number;
+  name: string;
+  email: string;
+  age?: number;
+}
diff --git a/tests/integration/server.integration.test.ts b/tests/integration/server.integration.test.ts
new file mode 100644
index 0000000..695dff6
--- /dev/null
+++ b/tests/integration/server.integration.test.ts
@@ -0,0 +1,94 @@
+import * as path from 'path';
+import request from 'supertest';
+import { createServer } from '../../src/server';
+import { invalidateTypeMap } from '../../src/utils/typeMapping';
+import { ServerConfig } from '../../src/types/config';
+
+const FIXTURES_DIR = path.join(__dirname, '../fixtures/types');
+
+const testConfig: ServerConfig = {
+  typesDir: FIXTURES_DIR,
+  port: 0,
+  hotReload: false,
+  cache: false,
+  verbose: false,
+};
+
+describe('Server integration', () => {
+  const app = createServer(testConfig);
+
+  beforeEach(() => {
+    // Ensure type map is rebuilt for each test
+    invalidateTypeMap();
+  });
+
+  describe('GET /health', () => {
+    it('returns 200 with status ok', async () => {
+      const res = await request(app).get('/health');
+      expect(res.status).toBe(200);
+      expect(res.body.status).toBe('ok');
+      expect(res.body).toHaveProperty('uptime');
+      expect(res.body).toHaveProperty('cache');
+    });
+  });
+
+  describe('GET /api/users', () => {
+    it('returns 200 with an array of users', async () => {
+      const res = await request(app).get('/api/users');
+      expect(res.status).toBe(200);
+      expect(res.body).toHaveProperty('data');
+      expect(Array.isArray(res.body.data)).toBe(true);
+      expect(res.body.data.length).toBeGreaterThan(0);
+    });
+
+    it('each item has the expected User shape', async () => {
+      const res = await request(app).get('/api/users');
+      const first = res.body.data[0];
+      expect(first).toHaveProperty('id');
+      expect(first).toHaveProperty('name');
+      expect(first).toHaveProperty('email');
+      expect(first.id).toBeDefined();
+      expect(typeof first.name).toBe('string');
+      expect(typeof first.email).toBe('string');
+    });
+
+    it('respects pageSize query parameter', async () => {
+      const res = await request(app).get('/api/users?pageSize=3');
+      expect(res.status).toBe(200);
+      expect(res.body.data.length).toBeLessThanOrEqual(3);
+    });
+
+    it('returns 400 on invalid query parameters', async () => {
+      const res = await request(app).get('/api/users?page=abc');
+      expect(res.status).toBe(400);
+      expect(res.body).toHaveProperty('error');
+    });
+  });
+
+  describe('GET /api/users/:id', () => {
+    it('returns 200 with a single user object', async () => {
+      const res = await request(app).get('/api/users/1');
+      expect(res.status).toBe(200);
+      expect(res.body).toHaveProperty('id');
+      expect(res.body).toHaveProperty('name');
+      expect(res.body).toHaveProperty('email');
+    });
+  });
+
+  describe('GET unknown route', () => {
+    it('returns 404 for unknown resources', async () => {
+      const res = await request(app).get('/api/unknownresource');
+      expect(res.status).toBe(404);
+      expect(res.body).toHaveProperty('error');
+    });
+  });
+
+  describe('x-mock-status header', () => {
+    it('forces the response status code to 503', async () => {
+      const res = await request(app)
+        .get('/api/users')
+        .set('x-mock-status', '503');
+      expect(res.status).toBe(503);
+    });
+  });
+});