NTXM Browser Mini is a desktop Chromium (CEF) that stays open on your machine — cookies, logins, and tabs included. An agent does not eat HTML or screenshots by default. It gets a small action map, acts by a short id, and gets the next map back in one call.
Unsigned Binary NoticeAs a solo developer, my installers are currently unsigned. Windows Defender, SmartScreen, or your browser may show a "Windows protected your PC" warning or falsely flag the file as harmful. To proceed, click "More info" → "Run anyway". Use at your own risk.
NTXM Browser is not another Chrome and not a cloud browser farm. It is the local agent browser: one warm profile, HTTP on port 9090, three tools.
An agent — script, NTXM Agent later, anything that can POST JSON — calls /v1. Sessions are s_19, not window=1&tab=4. One session is one tab. Delete closes that tab only.
Normal desktop window. Your Google / airline / site logins live in that profile.
Ranked controls, short ids (a3f), a few facts, hard cap 800 tokens.
fill / click / select / … in one request, optional wait — always returns a fresh observe.
You send a JSON schema; the browser fills it from the page. No LLM inside NTXM Browser.
Playwright, Playwright MCP, Stagehand, and Browser Use already drive browsers. NTXM Browser does not try to beat them at fleets, stealth, or “click the blue button” on a server.
Attach any model to the Chrome that is already open, using a tiny map and your existing cookies.
That is the whole product.
Legacy /windows, /tabs, /page_map, /click still answer for old scripts. They are internal. Manifest and docs lead with /v1.
Measured 2026-09-25 on the shipped 06-kitchen-sink.html only, base http://127.0.0.1:9090. Google Flights and live login traces are not part of this release pack.
Target < 300 ms
Target < 1.5 s
Target ≤ 800
No server-side natural language (act("click the blue button")) — the caller’s model picks the id
No cloud browsers, proxies, or CAPTCHA farm
No screenshot/HTML as the default agent path
No Playwright / CDP requirement
No tab groups
MCP is not a full SDK and not required to use the product
MCP (experimental): same three tools, JSON-RPC envelope at /mcp. Use it only if the host cannot call /v1. Cursor-style attach is not the 0.1.3 guarantee.
Allowlist: first successful origin locks the session. Navigate outside → blocked. A tunnel does not widen that.
POST http://127.0.0.1:9090/v1/session
POST http://127.0.0.1:9090/v1/session/s_19/go
POST http://127.0.0.1:9090/v1/observe
POST http://127.0.0.1:9090/v1/act
POST http://127.0.0.1:9090/v1/extract
GET http://127.0.0.1:9090/v1/manifest
NTXM Browser is the hands. It is not the planner. A future NTXM Agent can call /v1; that is a different product.
| NTXM Browser Mini | Playwright / MCP | Stagehand | Cloud agent browsers | |
|---|---|---|---|---|
| What it is | Local desktop Chromium + /v1 | Library / MCP tools | NL act/extract on Playwright | Rented Chrome + agent |
| Session | Your profile, already logged in | Usually a fresh context | Your script’s browser | Their machine |
| Default see | ~hundreds of tokens, short ids | Accessibility snapshot | Model + observe | Varies; often heavier |
| Default extract | Schema, no NTXM LLM | You parse | Their model + schema | Their agent |
| You install | One Windows exe, port 9090 | Node + browsers | SDK + keys | Account + hours |
Privacy: local-first, no NTXM telemetry. The page the agent opens is between you and that site.
NTXM Browser Mini 0.1.3 — TechXcelerate · NTXM
