diff --git a/api/src/base.ts b/api/src/base.ts
new file mode 100644
index 00000000..d348f900
--- /dev/null
+++ b/api/src/base.ts
@@ -0,0 +1,14 @@
+import Elysia from "elysia";
+import type { KError } from "./models/error";
+
+export const base = new Elysia({ name: "base" })
+	.onError(({ code, error }) => {
+		if (code === "VALIDATION") {
+			return {
+				status: error.status,
+				message: error.message,
+				details: error,
+			} as KError;
+		}
+	})
+	.as("plugin");
diff --git a/api/src/controllers/seed/index.ts b/api/src/controllers/seed/index.ts
index 645835fe..467462da 100644
--- a/api/src/controllers/seed/index.ts
+++ b/api/src/controllers/seed/index.ts
@@ -1,15 +1,15 @@
-import Elysia, { t } from "elysia";
+import Elysia from "elysia";
 import { Movie, SeedMovie } from "~/models/movie";
 import { seedMovie, SeedMovieResponse } from "./movies";
 import { Resource } from "~/models/utils";
 import { comment } from "~/utils";
+import { KError } from "~/models/error";
 
 export const seed = new Elysia()
 	.model({
 		movie: Movie,
 		"seed-movie": SeedMovie,
 		"seed-movie-response": SeedMovieResponse,
-		error: t.String(),
 	})
 	.post(
 		"/movies",
@@ -25,7 +25,7 @@ export const seed = new Elysia()
 					description: "Existing movie edited/updated.",
 				},
 				201: { ...SeedMovieResponse, description: "Created a new movie." },
-				400: "error",
+				400: { ...KError, description: "Invalid translation name" },
 				409: {
 					...Resource,
 					description: comment`
@@ -33,6 +33,7 @@ export const seed = new Elysia()
 						Change the slug and re-run the request.
 					`,
 				},
+				422: { ...KError, description: "Invalid schema in body." },
 			},
 			detail: {
 				tags: ["movies"],
diff --git a/api/src/controllers/seed/movies.ts b/api/src/controllers/seed/movies.ts
index 08ac4d35..45b3b8a4 100644
--- a/api/src/controllers/seed/movies.ts
+++ b/api/src/controllers/seed/movies.ts
@@ -171,7 +171,7 @@ export const seedMovie = async (
 	}
 
 	return {
-		status: ret.updated ? "Ok" : "Created",
+		status: ret.updated ? "OK" : "Created",
 		id: ret.id,
 		slug: ret.slug,
 		videos: retVideos,
diff --git a/api/src/models/error.ts b/api/src/models/error.ts
new file mode 100644
index 00000000..c795ad12
--- /dev/null
+++ b/api/src/models/error.ts
@@ -0,0 +1,8 @@
+import { t } from "elysia";
+
+export const KError = t.Object({
+	status: t.Integer(),
+	message: t.String(),
+	details: t.Any(),
+});
+export type KError = typeof KError.static;
diff --git a/api/tests/seed-movies.test.ts b/api/tests/seed-movies.test.ts
index 49e384a4..1173116c 100644
--- a/api/tests/seed-movies.test.ts
+++ b/api/tests/seed-movies.test.ts
@@ -128,9 +128,35 @@ describe("Movie seeding", () => {
 		expect(body.slug).toBe(existing.slug);
 	});
 
-	test.todo("Missing videos send info", async () => {});
-	test.todo("Schema error", async () => {});
-	test.todo("Invalid translation name", async () => {});
+	it("Missing videos send info", async () => {
+		const vid = "a0ddf0ce-3258-4452-a670-aff36c76d524";
+		const [existing] = await db
+			.select()
+			.from(videos)
+			.where(eq(videos.id, vid))
+			.limit(1);
+		expect(existing).toBeUndefined();
+
+		const [resp, body] = await createMovie({
+			...dune,
+			videos: [vid],
+		});
+
+		expectStatus(resp, body).toBe(200);
+		expect(body.videos).toBeArrayOfSize(0);
+	});
+
+	it("Schema error (missing fields)", async () => {
+		const [resp, body] = await createMovie({
+			name: "dune",
+		} as any);
+
+		expectStatus(resp, body).toBe(422);
+		expect(body.status).toBe(422);
+		expect(body.message).toBeString();
+		expect(body.details).toBeObject();
+		// TODO: handle additional fields too
+	});
 	test.todo("Create correct video slug (version)", async () => {});
 	test.todo("Create correct video slug (part)", async () => {});
 	test.todo("Create correct video slug (rendering)", async () => {});