Appearance
Amazon Nova Act
What It Is
Amazon Nova Act is an AWS service and Python SDK for building and deploying AI agents that automate browser-based UI workflows at scale. It uses a custom Nova 2 Lite model to execute natural language instructions directly in a Chrome browser, combining the flexibility of plain English prompts with Python control flow.
Nova Act handles browser navigation, form filling, data extraction, web QA testing, and multi-step checkout flows. When a task requires human judgment, it escalates to a human supervisor via a Human-in-the-Loop (HITL) pattern.
Category: Infra / Cloud Browser Automation SDK
Key Capabilities
- Executes natural language tasks in a real Chrome or Chromium browser
- Structured data extraction via Pydantic schemas (
act_get) - Async support for parallel agent sessions
- Human-in-the-Loop (HITL) escalation for complex decisions
- Remote MCP and external tool integration (Preview)
- Integrates with Amazon Bedrock AgentCore, CloudWatch, and AWS IAM
- Session replay, video recording, and trace logging
- Proxy support and configurable browser user agent
- Deploy fleets of agents to AWS AgentCore Runtime via the Nova Act CLI
Authentication Modes
| Mode | When to use |
|---|---|
| API Key (nova.amazon.com) | Playground, local dev, prototyping |
| IAM Credentials | Production AWS deployments, AgentCore Runtime |
API key auth is subject to the nova.amazon.com Terms of Use. IAM-based deployments are governed by your AWS Service Terms and Customer Agreement.
Free vs Paid
Paid. Nova Act is billed at $4.75 per agent hour (real elapsed time while the agent is actively working). Parallel agent sessions each generate separate charges. Time spent waiting during HITL pauses is excluded from billing. There is no documented free tier.
Python Version Requirement
Python 3.10 or above. Supported operating systems: macOS Sierra+, Ubuntu 22.04+, WSL2, or Windows 10+.
Official Links
- Product page: https://aws.amazon.com/nova/act/
- SDK (GitHub): https://github.com/aws/nova-act
- Sample code: https://github.com/amazon-agi-labs/nova-act-samples
- User Guide: https://docs.aws.amazon.com/nova-act/latest/userguide/
- Web Playground: https://nova.amazon.com/act
- Pricing: https://aws.amazon.com/nova/pricing/
Safety and ToS Notes
- API key usage is subject to the nova.amazon.com Terms of Use (separate from AWS terms).
- IAM-based usage is governed by AWS Service Terms and your Customer Agreement.
- SDK versions older than 3.0 are no longer supported and do not receive security updates. Upgrade with
pip install --upgrade nova-act. - Nova Act supports English only.
- Do not interact with the browser manually while an
act()call is running; the model has no visibility into manual changes.