diff --git a/frontend/CLAUDE.md b/frontend/CLAUDE.md
index 6094c34..9ed7f16 100644
--- a/frontend/CLAUDE.md
+++ b/frontend/CLAUDE.md
@@ -30,3 +30,15 @@ npm run check    # svelte-check — debe salir 0 errores antes de cerrar un camb
 `hooks.server.ts` valida la cookie de sesión cifrada (`mf_session`), refresca el `access_token` y puebla `locals.user` / `locals.accessToken`. Para proteger una ruta, comprueba `locals.user` en su `load` y redirige a `/login?returnTo=…`. Para el backend, envía `locals.accessToken` como Bearer hacia `API_BASE_URL`.
 
 Variables de entorno en `.env` (ver `.env.example`): `ZITADEL_*`, `AUTH_REDIRECT_URI`, `AUTH_POST_LOGOUT_URI`, `SESSION_SECRET`, `API_BASE_URL`.
+
+## Backend API
+
+Cliente tipado con `openapi-fetch` sobre el OpenAPI de `Musify.Api`. En un `load`/action server:
+
+```ts
+import { createApiClient } from '$lib/server/api';
+const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
+const { data, error: err } = await api.GET('/tracks');
+```
+
+Devuelve `{ data, error }` (estilo ErrorOr), no lanza. Los tipos viven en `src/lib/api/schema.d.ts` y se regeneran con `npm run gen:api` (requiere la API dev levantada en `API_BASE_URL`, que expone `/openapi/v1.json` solo en Development).
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index e022877..dc407b6 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -10,6 +10,7 @@
 			"dependencies": {
 				"@sveltejs/adapter-node": "^5.5.7",
 				"jose": "^6.2.3",
+				"openapi-fetch": "^0.17.0",
 				"openid-client": "^6.8.4"
 			},
 			"devDependencies": {
@@ -1834,6 +1835,21 @@
 				"node": ">=12.20.0"
 			}
 		},
+		"node_modules/openapi-fetch": {
+			"version": "0.17.0",
+			"resolved": "https://registry.npmjs.org/openapi-fetch/-/openapi-fetch-0.17.0.tgz",
+			"integrity": "sha512-PsbZR1wAPcG91eEthKhN+Zn92FMHxv+/faECIwjXdxfTODGSGegYv0sc1Olz+HYPvKOuoXfp+0pA2XVt2cI0Ig==",
+			"license": "MIT",
+			"dependencies": {
+				"openapi-typescript-helpers": "^0.1.0"
+			}
+		},
+		"node_modules/openapi-typescript-helpers": {
+			"version": "0.1.0",
+			"resolved": "https://registry.npmjs.org/openapi-typescript-helpers/-/openapi-typescript-helpers-0.1.0.tgz",
+			"integrity": "sha512-OKTGPthhivLw/fHz6c3OPtg72vi86qaMlqbJuVJ23qOvQ+53uw1n7HdmkJFibloF7QEjDrDkzJiOJuockM/ljw==",
+			"license": "MIT"
+		},
 		"node_modules/openid-client": {
 			"version": "6.8.4",
 			"resolved": "https://registry.npmjs.org/openid-client/-/openid-client-6.8.4.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index 84f2b4f..2857179 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,7 +9,8 @@
 		"preview": "vite preview",
 		"prepare": "svelte-kit sync || echo ''",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"gen:api": "npx -y openapi-typescript@7 http://localhost:5111/openapi/v1.json -o src/lib/api/schema.d.ts"
 	},
 	"devDependencies": {
 		"@sveltejs/adapter-auto": "^7.0.1",
@@ -25,6 +26,7 @@
 	"dependencies": {
 		"@sveltejs/adapter-node": "^5.5.7",
 		"jose": "^6.2.3",
+		"openapi-fetch": "^0.17.0",
 		"openid-client": "^6.8.4"
 	}
 }
diff --git a/frontend/src/lib/api/schema.d.ts b/frontend/src/lib/api/schema.d.ts
new file mode 100644
index 0000000..0830276
--- /dev/null
+++ b/frontend/src/lib/api/schema.d.ts
@@ -0,0 +1,4 @@
+export type paths = Record<string, never>;
+export type webhooks = Record<string, never>;
+export type components = Record<string, never>;
+export type operations = Record<string, never>;
diff --git a/frontend/src/lib/server/api.ts b/frontend/src/lib/server/api.ts
new file mode 100644
index 0000000..e321e93
--- /dev/null
+++ b/frontend/src/lib/server/api.ts
@@ -0,0 +1,16 @@
+import createClient from 'openapi-fetch';
+import type { paths } from '$lib/api/schema';
+import { apiConfig } from '$lib/server/config';
+
+interface ApiClientOptions {
+	fetch: typeof fetch;
+	accessToken?: string;
+}
+
+export function createApiClient({ fetch, accessToken }: ApiClientOptions) {
+	return createClient<paths>({
+		baseUrl: apiConfig.baseUrl,
+		fetch,
+		headers: accessToken ? { Authorization: `Bearer ${accessToken}` } : undefined
+	});
+}
diff --git a/frontend/src/lib/server/config.ts b/frontend/src/lib/server/config.ts
index 76515cb..75863b2 100644
--- a/frontend/src/lib/server/config.ts
+++ b/frontend/src/lib/server/config.ts
@@ -45,3 +45,9 @@ export const authConfig = {
 		return env.AUTH_ALLOW_INSECURE_HTTP === 'true';
 	}
 };
+
+export const apiConfig = {
+	get baseUrl() {
+		return (env.API_BASE_URL ?? '').replace(/\/+$/, '');
+	}
+};