har-api-extract

A CLI tool to extract and format JSON/GraphQL API requests from HAR files for LLM analysis.

Features

• Extract all JSON and GraphQL requests from HAR files
• Format output optimized for LLM analysis
• Compact mode for quick overview
• Read from file or stdin
• Built with TypeScript and Effect

Installation

Quick Usage (no install)

npx har-api-extract network.har

Global Install

npm install -g har-api-extract

# Then use directly
har-api-extract network.har

From Source

git clone https://github.com/aaronshaf/har-api-extract.git
cd har-api-extract
npm install

Usage

# Process a HAR file
har-api-extract network.har

# Compact output
har-api-extract network.har --compact

# Read from stdin
cat network.har | har-api-extract

# Pipe to clipboard (macOS)
har-api-extract network.har | pbcopy

# Include all requests (not just JSON/GraphQL)
har-api-extract network.har --all

Options

• -c, --compact - Output in compact format
• -a, --all - Include all requests, not just JSON/GraphQL
• -h, --help - Show help message

How to Export HAR Files

1. Open Chrome DevTools (F12 or Cmd+Option+I)
2. Go to Network tab
3. Perform the actions you want to capture
4. Click the download arrow (⬇) in the Network panel toolbar
5. Save as HAR file

Output Format

Default (LLM-Optimized)

Provides detailed information about each request including:

• Request method and URL
• Status code and duration
• GraphQL operation names
• Full request/response bodies (JSON formatted)

Compact Mode

Shows a quick overview with:

• Request type (GraphQL/REST)
• URL and status
• Response time
• Key response fields

Example

# Extract GraphQL requests from Apollo Studio
har-api-extract examples/studio.apollographql.com.har --compact

# Output:
# API Requests Overview
# 7 total requests (6 GraphQL, 1 REST)
#
# [GraphQL: RoutedAppMeQuery] POST https://graphql.api.apollographql.com/api/graphql -> 200 (42ms)
#   Response keys: me
# ...