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If you are looking for a Cursor browser alternative because the agent "checked" the page and the feature was still broken, Reticle adds what the built-in browser does not: a pass or fail decided from network, app state and console, replayed deterministically. If you only want the agent to look at and click your app, Cursor's browser is the zero-install default and the right place to start.
What the Cursor browser does
Cursor's agent can drive a browser inside the editor. In Cursor's words: "Agent can control a web browser to test applications, audit accessibility, convert designs into code, and more" (docs).
The agent navigates, clicks, types and takes screenshots, and it can read console logs and network requests with their payloads. You can also pick an element in the editor's browser and hand it to the agent. It was in beta in Cursor 1.7 and became generally available in Cursor 2.0 (changelog). It is not plan-gated on the pricing page; Cursor plans start at Free and Plus at $8 a month (pricing, checked 2026-10-25). Actions need approval by default, and the origin allowlist is described as best-effort.
What Reticle does
Reticle checks an AI coding agent's change from inside the running web app and returns a verdict with evidence. It reads the network calls, the application state and the console, and on React and Svelte it names the file:line to fix.
Cursor's agent calls it through MCP. Flows it drives are saved and replay deterministically, with no model in the loop. It also works on sites you don't own: it drives the page in its own browser and injects its SDK, reading network, console, DOM and routing; app state and file:line need the SDK in your own build. The SDK is open source (Apache-2.0).
Cursor browser vs Reticle at a glance
| Cursor browser | Reticle | |
|---|---|---|
| What it gives the agent | Eyes and hands: screenshots, clicks, console and network logs | A verdict: pass, fail or cannot tell, with the evidence |
| Who decides it worked | The model, reading what it saw | A declared expected outcome, checked after the step settles |
| App state (store) | Not read | Read (with the SDK in your build) |
| Re-running a check | The agent drives it again | Deterministic replay, no model, 0% flake over 8 replays |
| Points to the fix | What the agent noticed | The failing request or state, and file:line on React and Svelte |
| Setup | None for Cursor users | MCP config plus a small SDK, or one line to your agent |
| Works outside Cursor | No | Claude Code, Codex and any MCP agent, plus CI |
Where the Cursor browser is the better choice
- Zero setup. It is already in your editor. Nothing to install in the app.
- Visual and design work. Picking an element in the editor and asking the agent to match a design is something Reticle does not do.
- A quick look is enough. For layout, copy and "does the page load", watching the agent click is fine.
- Your signed-in workflow lives in Cursor. No second tool, no second config.
Where Reticle is the better choice
- "It looked right" is not the bar. A charge request that fires twice, a write that returns 200 and never persists, a store that disagrees with the page. Reticle checks the request count, the state and the console against the outcome the step was supposed to have, so these fail even when the screenshot is correct.
- You want the same check every time. A saved flow replays with no model in the loop. Re-verifying a four-flow suite costs about 480 tokens, about 251 times less than having a model re-drive it.
- You switch agents or run CI. The same flows run from Claude Code, Codex or
npx @reticlehq/server verifyin CI.
On 88 seeded bugs, Reticle caught 85 with no false alarms; two of the other three are traps a correct tool must not flag, and one is a genuine miss (scorecard).
Can you use both?
Yes, and most Cursor users should. Let the built-in browser do the looking and clicking; let Reticle decide whether the change worked and keep that check as a flow that runs again on the next change. The setup for Cursor is on the Cursor testing page, and the argument for checking behaviour rather than the screen is in why a green check isn't proof.
Try Reticle
Paste one line to Cursor's agent, and it installs and wires the SDK in your app:
Follow https://raw.githubusercontent.com/reticlehq/reticle/main/SKILL.md
Other agent tools are compared on the alternatives page.
FAQ
Is there an alternative to Cursor's built-in browser?
Yes. Reticle works alongside or instead of Cursor's built-in browser through MCP. Instead of the agent judging a screenshot, Reticle checks network, app state and console against the expected outcome and returns pass or fail with evidence. Other options include Playwright MCP, Chrome DevTools MCP and Vercel's agent-browser for driving the page.
Can Cursor's agent test my web app?
Yes. Cursor's agent can test your web app with its built-in browser: it navigates, clicks, takes screenshots and reads console and network logs. What it does not give you is a deterministic verdict or a replayable check. The model decides whether what it saw looks right, so a bug that looks correct on screen can pass.
Does Reticle work with Cursor?
Yes. Reticle works with Cursor through MCP. You add the Reticle MCP server to Cursor's configuration, or paste the SKILL.md line to the agent and let it wire the SDK. The agent then calls Reticle while it works, reads the verdict, and fixes the failing request, state or source line before it says done.
Why Reticle
Your agent says it works. Reticle checks.
- Checks each change inside the running app: network, state and console, not a screenshot.
- Returns a pass or fail with the evidence and the file:line to fix.
- Open-source SDK on your machine, or the platform on every preview and PR.
No credit card required.