Download & Install

The fastest way to put anything on the internet.

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GoSDK

Get started with Go

Clone the ngrok Go SDK example:

git clone git@github.com:ngrok/go-sdk-example.git && cd go-sdk-example

Run your app

NGROK_AUTHTOKEN=<YOUR_AUTHTOKEN> go run main.go

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Open your ngrok URL in a browser to see it working!

You’re all set. What’s next?

1tp := `2on_http_request:3	# redirect users to Google to log in4	- actions:5		- type: oauth6			config:7				provider: google8 9	# allow logins *only* from acme.com10	- expressions:11		- "!actions.ngrok.oauth.identity.email.endsWith('@acme.com')"12		actions:13		- type: deny14`15 16fwd, err := ngrok.Forward(ctx, ngrok.WithUpstream("http://localhost:8085"), ngrok.WithTrafficPolicy(tp))

Inspect every detail of your traffic

Watch the flow in real time, then dig into the headers, body, latency, response, and more for every request.

Traffic inspector showing live request paths, client IPs, and status codes

Peruse the Go SDK quickstart

Follow along to embed ngrok into your app and use Traffic Policy for auth and traffic transformation.

Bring your own domain

Paid feature

Create a DNS CNAME record to use your own domain name for your endpoint URL.

1func connectNgrok() {2	fwd, err := ngrok.Forward(context.Background(),3		ngrok.WithUpstream("http://localhost:8085"),4		ngrok.WithURL("app.acme.com"),5	)6}

Listen, don't forward

Serve traffic directly on an ngrok listener without forwarding. Your handler receives connections straight from the internet.

1func main() {2		ln, _ := ngrok.Listen(ctx)3		http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {4				fmt.Fprintln(w, "Hello from ngrok-go!")5		}))6}