Prism

Prism is a Chrome DevTools extension that observes network traffic while you browse and generates a structured API reference bundle.

It exists to make reverse-engineering undocumented web APIs faster and repeatable for developers building scrapers, automations, or integrations.

UI Screenshot

What Prism Does

Prism is built around mapping, not dumping.

• It deduplicates repeated requests into endpoint-level entries.
• It infers request and response schemas from multiple observations.
• It exports a clean bundle you can hand to a coding agent.
• It can optionally enrich that bundle with AI-generated endpoint explanations at export time.

Prism does not export raw request/response payload dumps in the structured bundle.

Who It's For

• Developers and technical users
• People reverse-engineering undocumented web APIs
• Teams building internal/external automations, scrapers, and integrations

How It Works

1. Open Chrome DevTools and switch to the Prism panel.
2. Browse the target site as usual.
3. Prism records relevant network calls and builds normalized endpoint mappings.
4. Export a structured bundle from the panel.

The bundle contains:

• endpoints.json: deduplicated endpoint index with inferred request schema and response references
• responses.json: shared response schema library referenced by responseRef
• PRISM_MAP.md: instructions for navigating the bundle

Install

Download prism-x.x.x-chrome.zip from the latest release, unzip it, open chrome://extensions, enable Developer Mode, and click Load unpacked.

Local Setup (WXT)

Prerequisites

• Node.js and npm

Install and run

npm install
npm run dev -- --browser chrome

Then load the extension in Chrome:

1. Open chrome://extensions.
2. Enable Developer mode.
3. Click Load unpacked and select .output/chrome-mv3-dev.
4. Open any site, open DevTools, and use the Prism panel.

Build

npm run build

AI Enrichment (Optional)

Prism can enrich exports with plain-language endpoint metadata.

1. Open Prism panel -> Settings.
2. Toggle AI Enrichment on.
3. Choose a provider (OpenAI, Gemini, or Anthropic) and paste an API key.
4. Export the structured bundle.

With AI enrichment enabled, Prism adds endpoint descriptions, auth notes, semantic grouping, field annotations, and a capabilities summary to the export.

If AI enrichment is enabled but no API key is set (or provider calls fail), Prism still exports the bundle without enrichment.