---
description: Return JSON directly from a Worker script, useful for building APIs and middleware.
title: Return JSON
image: https://developers.cloudflare.com/og-docs.png
---

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# Return JSON

Return JSON directly from a Worker script, useful for building APIs and middleware.

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://mchen-ai-models-sync.previews.developers.cloudflare.com/workers/examples/return-json/index.md)|[Agent setup](https://mchen-ai-models-sync.previews.developers.cloudflare.com/agent-setup/)

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This creates a repository in your GitHub account and deploys the application to Cloudflare Workers.

```js
export default {
  async fetch(request) {
    const data = {
      hello: "world",
    };

    return Response.json(data);
  },
};
```

```ts
export default {
	async fetch(request): Promise<Response> {
		const data = {
			hello: "world",
		};

		return Response.json(data);
	},
} satisfies ExportedHandler;
```

```py
from workers import WorkerEntrypoint, Response
import json

class Default(WorkerEntrypoint):
    def fetch(self, request):
        data = json.dumps({"hello": "world"})
        headers = {"content-type": "application/json"}
        return Response(data, headers=headers)
```

```rs
use serde::{Deserialize, Serialize};
use worker::*;

#[derive(Deserialize, Serialize, Debug)]
struct Json {
    hello: String,
}

#[event(fetch)]
async fn fetch(_req: Request, _env: Env, _ctx: Context) -> Result<Response> {
    let data = Json {
        hello: String::from("world"),
    };
    Response::from_json(&data)
}
```

```ts
import { Hono } from "hono";

const app = new Hono();

app.get("*", (c) => {
	const data = {
		hello: "world",
	};

	return c.json(data);
});

export default app;
```

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```json
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```