diff --git a/src/client.ts b/src/client.ts
index dc31d14..4482da5 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -98,8 +98,9 @@ export async function apiGet(
 	params?: Record<string, unknown>,
 ) {
 	const client = createClient();
+	// tRPC SuperJSON input uses the { json: ... } envelope.
 	const query = params
-		? `?input=${encodeURIComponent(JSON.stringify(params))}`
+		? `?input=${encodeURIComponent(JSON.stringify({ json: params }))}`
 		: "";
 	const response = await client.get(`/trpc/${endpoint}${query}`);
 	return response.data?.result?.data?.json ?? response.data;
diff --git a/tests/client.test.ts b/tests/client.test.ts
index 849213f..3fbcfba 100644
--- a/tests/client.test.ts
+++ b/tests/client.test.ts
@@ -1,4 +1,17 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { apiGet } from "../src/client.js";
+
+const getSpy = vi.hoisted(() => vi.fn());
+
+vi.mock("axios", () => {
+	return {
+		default: {
+			create: () => ({
+				get: getSpy,
+			}),
+		},
+	};
+});
 
 describe("readAuthConfig", () => {
 	const originalEnv = { ...process.env };
@@ -48,6 +61,44 @@ describe("readAuthConfig", () => {
 	});
 });
 
+describe("apiGet", () => {
+	const originalEnv = { ...process.env };
+
+	beforeEach(() => {
+		process.env.DOKPLOY_URL = "https://test.dokploy.com";
+		process.env.DOKPLOY_API_KEY = "test-key-123";
+		getSpy.mockReset().mockResolvedValue({ data: {} });
+	});
+
+	afterEach(() => {
+		process.env = { ...originalEnv };
+	});
+
+	it("should wrap GET params in the SuperJSON { json: ... } input envelope", async () => {
+		await apiGet("compose.one", { composeId: "abc123", limit: 1 });
+
+		expect(getSpy).toHaveBeenCalledWith(
+			`/trpc/compose.one?input=${encodeURIComponent(
+				JSON.stringify({ json: { composeId: "abc123", limit: 1 } }),
+			)}`,
+		);
+	});
+
+	it("should omit the input query string when params are undefined", async () => {
+		await apiGet("project.all");
+
+		expect(getSpy).toHaveBeenCalledWith("/trpc/project.all");
+	});
+
+	it("should send an empty { json: {} } envelope when params are an empty object", async () => {
+		await apiGet("project.all", {});
+
+		expect(getSpy).toHaveBeenCalledWith(
+			`/trpc/project.all?input=${encodeURIComponent(JSON.stringify({ json: {} }))}`,
+		);
+	});
+});
+
 describe("saveAuthConfig", () => {
 	it("should write config with correct structure", async () => {
 		const { saveAuthConfig } = await import("../src/client.js");