Perform an action

import Stagehand from 'stagehand-sdk';

const client = new Stagehand({
  browserbaseAPIKey: process.env['BROWSERBASE_API_KEY'], // This is the default and can be omitted
  browserbaseProjectID: process.env['BROWSERBASE_PROJECT_ID'], // This is the default and can be omitted
  modelAPIKey: process.env['MODEL_API_KEY'], // This is the default and can be omitted
});

const response = await client.sessions.act('c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123', {
  input: 'Click the login button',
});

console.log(response.data);

import os
from stagehand import Stagehand

client = Stagehand(
    browserbase_api_key=os.environ.get("BROWSERBASE_API_KEY"),  # This is the default and can be omitted
    browserbase_project_id=os.environ.get("BROWSERBASE_PROJECT_ID"),  # This is the default and can be omitted
    model_api_key=os.environ.get("MODEL_API_KEY"),  # This is the default and can be omitted
)
for session in client.sessions.act(
    id="c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123",
    input="Click the login button",
):
  print(session)

package main

import (
	"context"
	"fmt"

	"github.com/browserbase/stagehand-go"
	"github.com/browserbase/stagehand-go/option"
)

func main() {
	client := stagehand.NewClient(
		option.WithBrowserbaseAPIKey("My Browserbase API Key"),
		option.WithBrowserbaseProjectID("My Browserbase Project ID"),
		option.WithModelAPIKey("My Model API Key"),
	)
	response, err := client.Sessions.Act(
		context.TODO(),
		"c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123",
		stagehand.SessionActParams{
			Input: stagehand.SessionActParamsInputUnion{
				OfString: stagehand.String("Click the login button"),
			},
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", response.Data)
}

package com.browserbase.api.example;

import com.browserbase.api.client.StagehandClient;
import com.browserbase.api.client.okhttp.StagehandOkHttpClient;
import com.browserbase.api.models.sessions.SessionActParams;
import com.browserbase.api.models.sessions.SessionActResponse;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        StagehandClient client = StagehandOkHttpClient.fromEnv();

        SessionActParams params = SessionActParams.builder()
            .id("c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123")
            .input("Click the login button")
            .build();
        SessionActResponse response = client.sessions().act(params);
    }
}

package com.browserbase.api.example

import com.browserbase.api.client.StagehandClient
import com.browserbase.api.client.okhttp.StagehandOkHttpClient
import com.browserbase.api.models.sessions.SessionActParams
import com.browserbase.api.models.sessions.SessionActResponse

fun main() {
    val client: StagehandClient = StagehandOkHttpClient.fromEnv()

    val params: SessionActParams = SessionActParams.builder()
        .id("c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123")
        .input("Click the login button")
        .build()
    val response: SessionActResponse = client.sessions().act(params)
}

require "stagehand"

stagehand = Stagehand::Client.new(
  browserbase_api_key: "My Browserbase API Key",
  browserbase_project_id: "My Browserbase Project ID",
  model_api_key: "My Model API Key"
)

response = stagehand.sessions.act("c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123", input: "Click the login button")

puts(response)

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Stagehand\Client;
use Stagehand\Core\Exceptions\APIException;

$client = new Client(
  browserbaseAPIKey: getenv('BROWSERBASE_API_KEY') ?: 'My Browserbase API Key',
  browserbaseProjectID: getenv(
    'BROWSERBASE_PROJECT_ID'
  ) ?: 'My Browserbase Project ID',
  modelAPIKey: getenv('MODEL_API_KEY') ?: 'My Model API Key',
);

try {
  $response = $client->sessions->act(
    'c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123',
    input: 'Click the login button',
    frameID: 'frameId',
    options: [
      'model' => [
        'auth' => [
          'credentials' => [
            'clientEmail' => 'client_email',
            'privateKey' => 'private_key',
            'authProviderX509CertURL' => 'https://example.com',
            'authUri' => 'https://example.com',
            'clientID' => 'client_id',
            'clientX509CertURL' => 'https://example.com',
            'privateKeyID' => 'private_key_id',
            'projectID' => 'project_id',
            'tokenUri' => 'https://example.com',
            'type' => 'service_account',
            'universeDomain' => 'universe_domain',
          ],
          'type' => 'googleServiceAccount',
          'projectID' => 'projectId',
          'scopes' => 'string',
          'universeDomain' => 'universeDomain',
        ],
        'modelName' => 'openai/gpt-5.4-mini',
        'provider' => 'vertex',
        'providerOptions' => [
          'vertex' => [
            'location' => 'us-central1',
            'project' => 'my-gcp-project',
            'baseURL' => 'https://example.com',
            'headers' => ['foo' => 'string'],
          ],
        ],
        'apiKey' => 'sk-some-openai-api-key',
        'baseURL' => 'https://api.openai.com/v1',
        'headers' => ['foo' => 'string'],
      ],
      'timeout' => 30000,
      'variables' => [
        'username' => 'john_doe',
        'password' => [
          'value' => 'secret123', 'description' => 'The login password'
        ],
      ],
    ],
    xStreamResponse: 'true',
  );

  var_dump($response);
} catch (APIException $e) {
  echo $e->getMessage();
}

using System;
using Stagehand;
using Stagehand.Models.Sessions;

StagehandClient client = new();

SessionActParams parameters = new()
{
    ID = "c4dbf3a9-9a58-4b22-8a1c-9f20f9f9e123",
    Input = "Click the login button",
};

var response = await client.Sessions.Act(parameters);

Console.WriteLine(response);

curl --request POST \
  --url https://api.stagehand.browserbase.com/v1/sessions/{id}/act \
  --header 'Content-Type: application/json' \
  --header 'x-bb-api-key: <api-key>' \
  --header 'x-bb-project-id: <api-key>' \
  --data '
{
  "input": "Click the login button",
  "options": {
    "model": {
      "modelName": "openai/gpt-5.4-mini",
      "provider": "<string>",
      "auth": {
        "type": "<string>",
        "credentials": {
          "private_key": "<string>",
          "client_email": "<string>",
          "type": "<string>",
          "project_id": "<string>",
          "private_key_id": "<string>",
          "client_id": "<string>",
          "auth_uri": "<string>",
          "token_uri": "<string>",
          "auth_provider_x509_cert_url": "<string>",
          "client_x509_cert_url": "<string>",
          "universe_domain": "<string>"
        },
        "scopes": "<string>",
        "projectId": "<string>",
        "universeDomain": "<string>"
      },
      "providerOptions": {
        "vertex": {
          "project": "my-gcp-project",
          "location": "us-central1",
          "baseURL": "<string>",
          "headers": {}
        }
      },
      "apiKey": "sk-some-openai-api-key",
      "baseURL": "https://api.openai.com/v1",
      "headers": {}
    },
    "variables": {
      "username": "john_doe",
      "password": {
        "value": "secret123",
        "description": "The login password"
      }
    },
    "timeout": 30000
  },
  "frameId": "<string>",
  "streamResponse": true
}
'

{
  "success": true,
  "data": {
    "result": {
      "success": true,
      "message": "Successfully clicked the login button",
      "actionDescription": "Clicked button with text 'Login'",
      "actions": [
        {
          "selector": "[data-testid='submit-button']",
          "description": "Click the submit button",
          "backendNodeId": 123,
          "method": "click",
          "arguments": [
            "Hello World"
          ]
        }
      ]
    },
    "actionId": "<string>"
  }
}