diff --git a/package-lock.json b/package-lock.json
index 54fe495..665ddf7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@handles-net/handles-server",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@handles-net/handles-server",
-      "version": "0.1.0",
+      "version": "0.2.0",
       "license": "MIT",
       "dependencies": {
         "pg": "^8.13.1",
@@ -19,12 +19,14 @@
       "devDependencies": {
         "@eslint/js": "^9.15.0",
         "@types/eslint__js": "^8.42.3",
+        "@types/express": "^5.0.0",
         "@types/jest": "^29.5.14",
-        "@types/node": "^22.9.1",
+        "@types/node": "^22.10.2",
         "@types/pg": "^8.11.10",
         "@vercel/ncc": "^0.38.3",
         "eslint": "^9.14.0",
         "jest": "^29.7.0",
+        "node-mocks-http": "^1.16.2",
         "pino-pretty": "^13.0.0",
         "pkg": "^5.8.1",
         "prettier": "^3.3.3",
@@ -1279,6 +1281,25 @@
         "@babel/types": "^7.20.7"
       }
     },
+    "node_modules/@types/body-parser": {
+      "version": "1.19.5",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.5.tgz",
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+      "dev": true,
+      "dependencies": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/connect": {
+      "version": "3.4.38",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
+      "integrity": "sha512-K6uROf1LD88uDQqJCktA4yzL1YYAK6NgfsI0v/mTgyPKWsX1CnJ0XPSDhViejru1GcRkLWb8RlzFYJRqGUbaug==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/eslint": {
       "version": "9.6.1",
       "dev": true,
@@ -1301,6 +1322,30 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/express": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.0.tgz",
+      "integrity": "sha512-DvZriSMehGHL1ZNLzi6MidnsDhUZM/x2pRdDIKdwbUNqqwHxMlRdkxtn6/EPKyqKpHqTl/4nRZsRNLpZxZRpPQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "^5.0.0",
+        "@types/qs": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "node_modules/@types/express-serve-static-core": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-5.0.2.tgz",
+      "integrity": "sha512-vluaspfvWEtE4vcSDlKRNer52DvOGrB2xv6diXy6UKyKW0lqZiWHGNApSyxOv+8DE5Z27IzVvE7hNkxg7EXIcg==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*",
+        "@types/qs": "*",
+        "@types/range-parser": "*",
+        "@types/send": "*"
+      }
+    },
     "node_modules/@types/graceful-fs": {
       "version": "4.1.9",
       "resolved": "https://registry.npmjs.org/@types/graceful-fs/-/graceful-fs-4.1.9.tgz",
@@ -1310,6 +1355,12 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/http-errors": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-2.0.4.tgz",
+      "integrity": "sha512-D0CFMMtydbJAegzOyHjtiKPLlvnm3iTZyZRSZoLq2mRhDdmLfIWOCYPfQJ4cu2erKghU++QvjcUjp/5h7hESpA==",
+      "dev": true
+    },
     "node_modules/@types/istanbul-lib-coverage": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.6.tgz",
@@ -1349,13 +1400,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/mime": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz",
+      "integrity": "sha512-/pyBZWSLD2n0dcHE3hq8s8ZvcETHtEuF+3E7XVt0Ig2nvsVQXdghHVcEkIWjy9A0wKfTn97a/PSDYohKIlnP/w==",
+      "dev": true
+    },
     "node_modules/@types/node": {
-      "version": "22.9.1",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.9.1.tgz",
-      "integrity": "sha512-p8Yy/8sw1caA8CdRIQBG5tiLHmxtQKObCijiAa9Ez+d4+PRffM4054xbju0msf+cvhJpnFEeNjxmVT/0ipktrg==",
+      "version": "22.10.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.10.2.tgz",
+      "integrity": "sha512-Xxr6BBRCAOQixvonOye19wnzyDiUtTeqldOOmj3CkeblonbccA12PFwlufvRdrpjXxqnmUaeiU5EOA+7s5diUQ==",
       "dev": true,
       "dependencies": {
-        "undici-types": "~6.19.8"
+        "undici-types": "~6.20.0"
       }
     },
     "node_modules/@types/pg": {
@@ -1426,6 +1483,39 @@
         "node": ">=12"
       }
     },
+    "node_modules/@types/qs": {
+      "version": "6.9.17",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.17.tgz",
+      "integrity": "sha512-rX4/bPcfmvxHDv0XjfJELTTr+iB+tn032nPILqHm5wbthUUUuVtNGGqzhya9XUxjTP8Fpr0qYgSZZKxGY++svQ==",
+      "dev": true
+    },
+    "node_modules/@types/range-parser": {
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.7.tgz",
+      "integrity": "sha512-hKormJbkJqzQGhziax5PItDUTMAM9uE2XXQmM37dyd4hVM+5aVl7oVxMVUiVQn2oCQFN/LKCZdvSM0pFRqbSmQ==",
+      "dev": true
+    },
+    "node_modules/@types/send": {
+      "version": "0.17.4",
+      "resolved": "https://registry.npmjs.org/@types/send/-/send-0.17.4.tgz",
+      "integrity": "sha512-x2EM6TJOybec7c52BX0ZspPodMsQUd5L6PRwOunVyVUhXiBSKf3AezDL8Dgvgt5o0UfKNfuA0eMLr2wLT4AiBA==",
+      "dev": true,
+      "dependencies": {
+        "@types/mime": "^1",
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/serve-static": {
+      "version": "1.15.7",
+      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.15.7.tgz",
+      "integrity": "sha512-W8Ym+h8nhuRwaKPaDw34QUkwsGi6Rc4yYqvKFo5rm2FUEhCFbzVWrxXUxuKK8TASjWsysJY0nsmNCGhCOIsrOw==",
+      "dev": true,
+      "dependencies": {
+        "@types/http-errors": "*",
+        "@types/node": "*",
+        "@types/send": "*"
+      }
+    },
     "node_modules/@types/stack-utils": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/@types/stack-utils/-/stack-utils-2.0.3.tgz",
@@ -1663,6 +1753,19 @@
         "ncc": "dist/ncc/cli.js"
       }
     },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
+      "dev": true,
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/acorn": {
       "version": "8.14.0",
       "dev": true,
@@ -2230,6 +2333,38 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/content-disposition": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
+      "integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "5.2.1"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/content-disposition/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/convert-source-map": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
@@ -2358,6 +2493,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/depd": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
+      "integrity": "sha512-7emPTl6Dpo6JRXOXjLRxck+FlLRX5847cLKEn00PLAgc3g2hTZZgr+e4c2v6QpSmLeFP3n5yUo7ft6avBK/5jQ==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/detect-indent": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-7.0.1.tgz",
@@ -2867,6 +3011,15 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/fresh": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
+      "integrity": "sha512-zJ2mQYM18rEFOudeV4GShTGIQ7RbzA7ozbU9I/XBpm7kqgMywgmylMwXHxZJmkVoYkna9d2pVXVXPdYTP9ej8Q==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/from2": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/from2/-/from2-2.3.0.tgz",
@@ -4168,6 +4321,24 @@
         "tmpl": "1.0.5"
       }
     },
+    "node_modules/media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha512-dq+qelQ9akHpcOl/gUVRTxVIOkAJ1wR3QAvb4RsVjS8oVoFjDGTc679wJYmUmknUF5HwMLOgb5O+a3KxfWapPQ==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/merge-descriptors": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.3.tgz",
+      "integrity": "sha512-gaNvAS7TZ897/rVaZ0nMtAyxNyi/pdbjbAwUpFQpN70GqnVfOiXpeUUMKRBmzXaSQ8DdTX4/0ms62r2K+hE6mQ==",
+      "dev": true,
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/merge-stream": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/merge-stream/-/merge-stream-2.0.0.tgz",
@@ -4182,6 +4353,15 @@
         "node": ">= 8"
       }
     },
+    "node_modules/methods": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
+      "integrity": "sha512-iclAHeNqNm68zFtnZ0e+1L2yUIdvzNoauKU4WBA3VvH/vPFieF7qfRlwUZU+DA9P9bPXIS90ulxoUoCH23sV2w==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/micromatch": {
       "version": "4.0.8",
       "dev": true,
@@ -4194,6 +4374,39 @@
         "node": ">=8.6"
       }
     },
+    "node_modules/mime": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
+      "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==",
+      "dev": true,
+      "bin": {
+        "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/mime-db": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "dev": true,
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/mimic-fn": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.1.0.tgz",
@@ -4294,6 +4507,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/negotiator": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
+      "integrity": "sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/node-abi": {
       "version": "3.71.0",
       "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-3.71.0.tgz",
@@ -4332,6 +4554,39 @@
       "integrity": "sha512-O5lz91xSOeoXP6DulyHfllpq+Eg00MWitZIbtPfoSEvqIHdl5gfcY6hYzDWnj0qD5tz52PI08u9qUvSVeUBeHw==",
       "dev": true
     },
+    "node_modules/node-mocks-http": {
+      "version": "1.16.2",
+      "resolved": "https://registry.npmjs.org/node-mocks-http/-/node-mocks-http-1.16.2.tgz",
+      "integrity": "sha512-2Sh6YItRp1oqewZNlck3LaFp5vbyW2u51HX2p1VLxQ9U/bG90XV8JY9O7Nk+HDd6OOn/oV3nA5Tx5k4Rki0qlg==",
+      "dev": true,
+      "dependencies": {
+        "accepts": "^1.3.7",
+        "content-disposition": "^0.5.3",
+        "depd": "^1.1.0",
+        "fresh": "^0.5.2",
+        "merge-descriptors": "^1.0.1",
+        "methods": "^1.1.2",
+        "mime": "^1.3.4",
+        "parseurl": "^1.3.3",
+        "range-parser": "^1.2.0",
+        "type-is": "^1.6.18"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "peerDependencies": {
+        "@types/express": "^4.17.21 || ^5.0.0",
+        "@types/node": "*"
+      },
+      "peerDependenciesMeta": {
+        "@types/express": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/node-releases": {
       "version": "2.0.18",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.18.tgz",
@@ -4486,6 +4741,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/parseurl": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
+      "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/path-exists": {
       "version": "4.0.0",
       "dev": true,
@@ -5135,6 +5399,15 @@
       "version": "4.0.4",
       "license": "MIT"
     },
+    "node_modules/range-parser": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
+      "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/rc": {
       "version": "1.2.8",
       "resolved": "https://registry.npmjs.org/rc/-/rc-1.2.8.tgz",
@@ -5932,6 +6205,19 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "dev": true,
+      "dependencies": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/typescript": {
       "version": "5.6.3",
       "dev": true,
@@ -5967,9 +6253,10 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "6.19.8",
-      "dev": true,
-      "license": "MIT"
+      "version": "6.20.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.20.0.tgz",
+      "integrity": "sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg==",
+      "dev": true
     },
     "node_modules/universalify": {
       "version": "2.0.1",
diff --git a/package.json b/package.json
index 9eeb5fb..877c7a2 100644
--- a/package.json
+++ b/package.json
@@ -35,12 +35,14 @@
   "devDependencies": {
     "@eslint/js": "^9.15.0",
     "@types/eslint__js": "^8.42.3",
+    "@types/express": "^5.0.0",
     "@types/jest": "^29.5.14",
-    "@types/node": "^22.9.1",
+    "@types/node": "^22.10.2",
     "@types/pg": "^8.11.10",
     "@vercel/ncc": "^0.38.3",
     "eslint": "^9.14.0",
     "jest": "^29.7.0",
+    "node-mocks-http": "^1.16.2",
     "pino-pretty": "^13.0.0",
     "pkg": "^5.8.1",
     "prettier": "^3.3.3",
diff --git a/server.test.ts b/server.test.ts
new file mode 100644
index 0000000..da06cfe
--- /dev/null
+++ b/server.test.ts
@@ -0,0 +1,103 @@
+import { HandleMap } from "./providers/map";
+import { handleRequest, HttpConfiguration, defaultFallbackUrl } from "./server";
+import {
+  createRequest,
+  createResponse,
+  RequestOptions,
+  MockResponse,
+} from "node-mocks-http";
+
+const testHandleMap = new HandleMap(
+  new Map([["registered.at.example.com", "did:plc:example1"]]),
+);
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+type Response = MockResponse<any>;
+
+async function performRequest(
+  options: RequestOptions,
+  configuration: HttpConfiguration = {
+    fallbackUrl: defaultFallbackUrl,
+  },
+): Promise<Response> {
+  const req = createRequest(options);
+  const res = createResponse();
+
+  await handleRequest(req, res, testHandleMap, configuration);
+
+  return res;
+}
+
+describe("Handles Server", () => {
+  test("Responds to healthcheck request", async () => {
+    const res = await performRequest({ method: "GET", url: "/healthz" });
+
+    expect(res._getData()).toBe("OK");
+    expect(res._getStatusCode()).toBe(200);
+  });
+
+  test("Request to verify registered handle returns did.", async () => {
+    const res = await performRequest({
+      method: "GET",
+      url: "/.well-known/atproto-did",
+      headers: { Host: "registered.at.example.com" },
+    });
+
+    expect(res._getStatusCode()).toBe(200);
+    expect(res._getData()).toBe("did:plc:example1");
+  });
+
+  test("Request to verify unregistered handle returns error", async () => {
+    const res = await performRequest({
+      method: "GET",
+      url: "/.well-known/atproto-did",
+      headers: { Host: "not-registered.at.example.com" },
+    });
+
+    expect(res._getStatusCode()).toBe(404);
+  });
+
+  test("Request to visit registered handle redirects to profile", async () => {
+    const res = await performRequest({
+      method: "GET",
+      url: "/",
+      headers: { Host: "registered.at.example.com" },
+    });
+
+    expect(res._getStatusCode()).toBe(307);
+    expect(res._getHeaders().location).toBe(
+      "https://bsky.app/profile/registered.at.example.com",
+    );
+  });
+
+  test("Request to visit unregistered handle without fallback URL redirects to domain", async () => {
+    const res = await performRequest({
+      method: "GET",
+      url: "/",
+      headers: { Host: "not-registered.at.example.com" },
+    });
+
+    expect(res._getStatusCode()).toBe(307);
+    expect(res._getHeaders().location).toBe(
+      "https://at.example.com?utm_source=handles-server&utm_medium=http&utm_campaign=redirect&utm_term=not-registered.at.example.com",
+    );
+  });
+
+  test("Request to visit unregistered handle redirects to fallback URL", async () => {
+    const res = await performRequest(
+      {
+        method: "GET",
+        url: "/",
+        headers: { Host: "not-registered.at.example.com" },
+      },
+      {
+        fallbackUrl: "https://example.com/domains/{domain}?handle={handle}",
+      },
+    );
+
+    expect(res._getStatusCode()).toBe(307);
+    expect(res._getHeaders().location).toBe(
+      "https://example.com/domains/at.example.com?handle=not-registered.at.example.com",
+    );
+  });
+});
diff --git a/server.ts b/server.ts
index 26c2953..2f035c3 100644
--- a/server.ts
+++ b/server.ts
@@ -7,6 +7,9 @@ import {
 import { logger } from "./logging";
 import { FindsDecentralizedIDOfHandle } from "./handles";
 
+export const defaultFallbackUrl =
+  "https://{domain}?utm_source=handles-server&utm_medium=http&utm_campaign=redirect&utm_term={handle}";
+
 function respond(
   res: ServerResponse,
   body: string,
@@ -18,10 +21,15 @@ function respond(
   res.end();
 }
 
-async function handleRequest(
+export type HttpConfiguration = {
+  fallbackUrl: string;
+};
+
+export async function handleRequest(
   req: IncomingMessage,
   res: ServerResponse,
   handles: FindsDecentralizedIDOfHandle,
+  options: HttpConfiguration,
 ) {
   if (req.url === "/healthz") {
     return respond(res, "OK", 200);
@@ -60,14 +68,15 @@ async function handleRequest(
     return log.debug("Redirected to Bluesky profile.");
   }
 
-  const utm = new URLSearchParams({
-    utm_source: "handles-server",
-    utm_medium: "http",
-    utm_campaign: "redirect",
-    utm_term: handle,
-  });
+  let noProfileDestination = options.fallbackUrl;
 
-  const noProfileDestination = `${process.env.HANDLES_FALLBACK_URL || "https://" + domain}?${utm}`;
+  Object.entries({ domain, handle }).forEach(
+    ([token, value]) =>
+      (noProfileDestination = noProfileDestination.replace(
+        `{${token}}`,
+        value,
+      )),
+  );
 
   respond(res, "", 307, { location: noProfileDestination });
   return log.debug(
@@ -77,5 +86,9 @@ async function handleRequest(
 }
 
 export function expose(handles: FindsDecentralizedIDOfHandle) {
-  return createServer((req, res) => handleRequest(req, res, handles));
+  return createServer((req, res) =>
+    handleRequest(req, res, handles, {
+      fallbackUrl: process.env.HANDLES_FALLBACK_URL || defaultFallbackUrl,
+    }),
+  );
 }