Turn any web portal into a programmable API.

Enterprise portals lock critical data behind logins, iframes, and download buttons that were never meant to be automated. Otto gives Claude a stealth browser and 12 MCP tools to navigate them like a human — then exports repeatable scripts.

benefits.example.com/login
You:

How it works

Six capabilities that turn a chat into a browser automation pipeline.

Why Otto?

How Otto compares to the alternatives you're already considering.

Otto Dev-Browser Chrome Extension MCP Playwright MCP
Works on portals you don't control Yes — enterprise portals, vendor dashboards, HR systems Limited — designed for your own app Limited — your active browser session Limited — designed for your own app
Page discovery Compact scout reports (~200 tokens) You provide selectors You provide selectors You provide selectors
Credential safety Never appears in conversation Plaintext in context Plaintext in context Plaintext in context
XHR interception Built-in network monitor with filtering No No Limited
Export to script One command, runs unattended No No No
Encrypted credentials Vault with OS keyring No No No
Credential scrubbing Automatic in all output No No No
Best for Enterprise systems without APIs Testing your own app Interactive debugging Cross-browser test suites

12 MCP Tools

Everything Claude needs to explore, interact, and capture — organized by workflow stage.

Session
launch_session
Open a stealth browser
Recon
scout_page_tool
Structural overview in ~200 tokens
Recon
find_elements
Search by text, type, or selector
Interaction
execute_action_tool
Click, type, select, navigate
Interaction
fill_secret
Inject credential without exposure
Interaction
execute_javascript
Run JS in page context
Recon
take_screenshot
Visual verification
Recon
inspect_element
Deep element diagnostics
Observation
monitor_network
Capture XHR/Fetch traffic
Observation
record_video
CDP screencast to MP4
Session
get_session_history
Full structured action log
Session
close_session
Release browser resources

Get started

$ /plugin marketplace add stemado/otto-marketplace
$ /plugin install otto@otto-marketplace