Alpha · early access

AI agents that use the web, as an API

Your client drives a real browser locally; Node Mantis provides the intelligence, authentication, and usage-based billing. Start or attach to a browser, then run goals, bounded steps, checks, and grounded current-page retrieval.

Start free Read the docs

$10 in free credit to start · no card required

terminal

# install the local client (CLI + SDK)
$ npm install -g node-mantis@0.1.0-alpha.10

# point it at the service with your key
$ export NODEMANTIS_API_KEY="sk_live_<copy-from-dashboard>"

# run a task — the browser runs locally,
# each step is decided by the API
$ nodemantis run "find a 2-bed rental in Lisbon
    under €1500 and start an application" \
    --url https://rentals.example

How it works

Local browser, remote brain

Browser control, cookies, and session storage stay on your machine. Task instructions, selected page context, and screenshots go to the service so it can decide each action.

01
Get an API key
Sign up, open your dashboard, and generate a key. Make it available to your client as NODEMANTIS_API_KEY.
02
Run the agent locally
Your machine controls a real browser and keeps cookies and session storage local. Task instructions, selected page context, and screenshots are sent to the service for each decision.
03
The API decides each step
Every iteration calls the service for the next action. You only pay for the steps you use — tracked live against your balance.

Why Node Mantis

Everything you need to ship an agent

General web workflows

A reusable perception-and-action loop works from page context and screenshots, reducing the need for hand-written selectors and site-specific recipes.

Per-step metering

Pay for exactly the steps you run. Every decision debits your balance atomically; usage is visible in real time.

Bring your own task

Describe the goal in plain language. The agent plans, navigates, fills forms, and reports back when it's done.

Managed Chrome

Run against a real local Chrome session with a consistent managed browser profile, or attach Node Mantis to a Playwright page you already own.

Keys & usage dashboard

Create and revoke API keys, watch your balance, and see usage over time — an OpenAI-style console.

Versioned client, hosted intelligence

Hosted decision logic can improve server-side. Native browser and SDK capabilities ship through explicit, versioned client releases.

Give your software the web

Start with $10 in free credit. No card, no commitment — just an API key and a task.

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