DevSnoop — Developer Tools

What is DevSnoop?

DevSnoop is a developer tool that lets coding agents like Codex and Claude Code inspect your real Chrome tab, click UI elements, read console and network failures, and verify changes before editing the wrong file. It pairs a Chrome extension with a native host on your machine, exposing a small HTTP API for browser inspection and interaction.

Problem it solves

Coding agents often lack a feedback loop for frontend work because the critical evidence—DOM state, failed requests, console exceptions—is trapped in the browser. DevSnoop closes that gap, enabling agents to understand what's on the page, reproduce user actions, and see what changed after a click or hot reload, reducing guesswork and wasted edits.

Who it is for

DevSnoop is for developers using AI coding agents on local projects, especially those working on frontend or full-stack apps where browser state matters. It's not a replacement for end-to-end testing or visual regression tools—it's a practical, local bridge that lets agents see the actual browser evidence.

Use cases

Typical uses include debugging why a checkout fails, verifying a UI change after a hot reload, auditing legibility of faint text or icons, and keeping multiple Chrome profiles with separate logins for agent-driven testing.

• page_summary — Get a compact semantic summary of the page's structure, text, controls, and selectors to help agents understand the UI without burning tokens.
• click, fill, scroll, hover — Let your agent interact with the browser like a real user to reproduce actions and test flows.
• get_network & get_logs — Capture console logs, network requests, and JS exceptions automatically, with redacted payloads, so agents can find the true failure.
• diff tracking — See what changed after an action or hot reload with lightweight DOM diffs, so agents know if the page updated as expected.
• Legibility & accessibility audits — Detect faint text, weak icon contrast, tiny labels, and other readability issues with selectors, locations, and fix guidance.
• Multiple Chrome profiles — Label profiles and let your agent choose the right browser context, keeping separate logins and test accounts isolated.

DevSnoop pricing: $29 one-time. Billing model: Lifetime.

For comparison: the median starting price in Developer Tools is $19.99/month, measured across 301 tools we track. See the full SaaS Pricing Index →

DevSnoop – $29 one-time

Pay once, use forever. Includes inspect DOM, styles, and semantic structure; heuristic legibility audits; console logs, network errors, and exceptions; click, fill, scroll, hover, and screenshot actions; lightweight DOM diffs; tech stack detection; local native host connection; works with any coding agent; 1 year of updates.

Free 24-hour command preview: try every command for 24 hours before buying.

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