# Modal SDKs for JavaScript and Go | Modal Docs

- **URL:** https://modal.com/docs/guide/sdk-javascript-go
- **Summary:** Interact with Modal Sandboxes and call deployed Modal Functions from JS and Go codebases

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Modal SDKs for JavaScript and Go
================================

Modal also provides SDKs that enable using Modal Functions and Sandboxes from JavaScript/TypeScript and Go projects.

While Python is the primary language for building Modal applications and implementing Modal Functions, these SDKs enable use cases like:

*   Using Sandboxes in JS/Go projects, to safely execute arbitrary commands, run untrusted user code, or as a safe environment for AI agents.
*   Directly calling Modal Functions without having to define it as a public Web Function and address it via HTTP requests
*   Interacting with Modal resources like Volumes, Secrets, Queues, etc. directly from JS/Go.

We’re working towards feature parity with the main Modal Python SDK, although defining Modal Functions will likely remain exclusive to Python.

Installation 

For installation instructions, see the READMEs for [JavaScript](https://github.com/modal-labs/modal-client/tree/main/js)
 and [Go](https://github.com/modal-labs/modal-client/tree/main/go)
 on GitHub.

JavaScript/TypeScript 

The `modal` package is [distributed via npm](https://www.npmjs.org/package/modal)
. See the [JS API reference documentation](https://modal-labs.github.io/libmodal/)
 for details.

### Simple JavaScript Example 

    import { ModalClient } from "modal";
    
    const modal = new ModalClient();
    
    const app = await modal.apps.fromName("libmodal-example", {
      createIfMissing: true,
    });
    
    // Create a Sandbox with the specified Image, and mount a Volume
    const volume = await modal.volumes.fromName("libmodal-example-volume", {
      createIfMissing: true,
    });
    const image = modal.images.fromRegistry("alpine:3.21");
    const sb = await modal.sandboxes.create(app, image, {
      volumes: { "/mnt/volume": volume },
    });
    const p = await sb.exec(["cat", "/mnt/volume/message.txt"]);
    console.log(`Message: ${await p.stdout.readText()}`);
    await sb.terminate();
    
    // Call a previously deployed Modal Function
    const echo = await modal.functions.fromName("libmodal-example", "echo");
    console.log(await echo.remote(["Hello world!"]));

There are [many more examples available on GitHub](https://github.com/modal-labs/modal-client/blob/main/js/README.md#documentation)
.

Go 

The `modal-go` package is [installed via go get](https://pkg.go.dev/github.com/modal-labs/modal-client/go)
. See the [Go API reference documentation](https://pkg.go.dev/github.com/modal-labs/modal-client/go#section-documentation)
 for details.

### Simple Go Example 

    package main
    
    import (
    	"context"
    	"fmt"
    	"io"
    
    	modal "github.com/modal-labs/modal-client/go"
    )
    
    func main() {
    	// Skipping err handling throughout for brevity
    	ctx := context.Background()
    
    	mc, _ := modal.NewClient()
    
    	app, _ := mc.Apps.FromName(ctx, "libmodal-example", &modal.AppFromNameParams{CreateIfMissing: true})
    
    	// Create a Sandbox with the specified Image, and mount a Volume
    	volume, _ := mc.Volumes.FromName(ctx, "libmodal-example-volume", &modal.VolumeFromNameParams{CreateIfMissing: true})
    	image := mc.Images.FromRegistry("alpine:3.21", nil)
    	sb, _ := mc.Sandboxes.Create(ctx, app, image, &modal.SandboxCreateParams{
    		Volumes: map[string]*modal.Volume{"/mnt/volume": volume},
    	})
    	defer sb.Terminate(context.Background(), nil)
    	p, _ := sb.Exec(ctx, []string{"cat", "/mnt/volume/message.txt"}, nil)
    	stdout, _ := io.ReadAll(p.Stdout)
    	fmt.Printf("Message: %s\n", stdout)
    
    	// Call a previously deployed Modal Function
    	echo, _ := mc.Functions.FromName(ctx, "libmodal-example", "echo", nil)
    	result, _ := echo.Remote(ctx, []any{"Hello world!"}, nil)
    	fmt.Println(result)
    }

There are [many more examples available on GitHub](https://github.com/modal-labs/modal-client/blob/main/go/README.md#documentation)
.

Support 

The JS and Go Modal SDKs are in active development, and we love to hear your feedback. If you have questions or suggestions, please reach out on the [Modal Community Slack](https://modal.com/slack)
.

[Modal SDKs for JavaScript and Go](https://modal.com/docs/guide/sdk-javascript-go#modal-sdks-for-javascript-and-go)
[Installation](https://modal.com/docs/guide/sdk-javascript-go#installation)
[JavaScript/TypeScript](https://modal.com/docs/guide/sdk-javascript-go#javascripttypescript)
[Simple JavaScript Example](https://modal.com/docs/guide/sdk-javascript-go#simple-javascript-example)
[Go](https://modal.com/docs/guide/sdk-javascript-go#go)
[Simple Go Example](https://modal.com/docs/guide/sdk-javascript-go#simple-go-example)
[Support](https://modal.com/docs/guide/sdk-javascript-go#support)