diff --git a/routes.ts b/routes.ts
index 5c97cdac..b894201e 100644
--- a/routes.ts
+++ b/routes.ts
@@ -161,6 +161,7 @@ export const rawRoutes = {
 	"/users/[uuid]/outbox": await import(
 		serverPath + "/users/[uuid]/outbox/index.ts"
 	),
+	"/[...404]": await import(serverPath + "/[...404].ts"),
 };
 
 // Returns the route filesystem path when given a URL
@@ -175,10 +176,13 @@ export const matchRoute = <T = Record<string, never>>(url: string) => {
 
 	return {
 		// @ts-expect-error TypeScript parses this as a defined object instead of an arbitrarily editable route file
-		file: rawRoutes[route.name] as Promise<{
-			meta: APIRouteMeta;
-			default: RouteHandler<T>;
-		}>,
+		file: rawRoutes[route.name] as Promise<
+			| {
+					meta: APIRouteMeta;
+					default: RouteHandler<T>;
+			  }
+			| undefined
+		>,
 		matchedRoute: route,
 	};
 };
diff --git a/server.ts b/server.ts
index 0504e5ed..814a577e 100644
--- a/server.ts
+++ b/server.ts
@@ -1,4 +1,4 @@
-import { jsonResponse } from "@response";
+import { errorResponse, jsonResponse } from "@response";
 import { matches } from "ip-matching";
 import { getFromRequest } from "~database/entities/User";
 import type { ConfigManager, ConfigType } from "config-manager";
@@ -61,10 +61,22 @@ export const createServer = (
 			// There shouldn't be a performance hit after bundling right?
 			const { matchRoute } = await import("~routes");
 
-			const { file, matchedRoute } = matchRoute(req.url);
+			const { file: filePromise, matchedRoute } = matchRoute(req.url);
 
-			if (matchedRoute) {
-				const meta = (await file).meta;
+			const file = await filePromise;
+
+			if (matchedRoute && file == undefined) {
+				await logger.log(
+					LogLevel.ERROR,
+					"Server",
+					`Route file ${matchedRoute.filePath} not found or not registered in the routes file`
+				);
+
+				return errorResponse("Route not found", 500);
+			}
+
+			if (matchedRoute && file != undefined) {
+				const meta = file.meta;
 
 				// Check for allowed requests
 				if (!meta.allowedMethods.includes(req.method as any)) {
@@ -116,9 +128,7 @@ export const createServer = (
 					});
 				}
 
-				return await (
-					await file
-				).default(req.clone(), matchedRoute, {
+				return await file.default(req.clone(), matchedRoute, {
 					auth,
 					configManager,
 					parsedRequest,
diff --git a/server/api/[...404].ts b/server/api/[...404].ts
new file mode 100644
index 00000000..871e3a3d
--- /dev/null
+++ b/server/api/[...404].ts
@@ -0,0 +1,21 @@
+import { apiRoute, applyConfig } from "@api";
+import { errorResponse } from "@response";
+
+export const meta = applyConfig({
+	allowedMethods: ["POST", "GET", "PUT", "PATCH", "DELETE"],
+	auth: {
+		required: false,
+	},
+	ratelimits: {
+		duration: 60,
+		max: 100,
+	},
+	route: "/[...404]",
+});
+
+/**
+ * Default catch-all route, returns a 404 error.
+ */
+export default apiRoute(() => {
+	return errorResponse("This API route does not exist", 404);
+});