FRTMProxy

FRTMProxy is a macOS app to observe, understand, and shape HTTP/S traffic in real time. It’s built for daily debugging, with tools that organize requests, make mocking easy, and help you replay real-world scenarios in a few clicks.

FRTMProxy is free for every developer, and it will remain free.

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Install

Homebrew (recommended)

brew tap ValentinoPalomba/frtmtools
brew install --cask frtmproxy

Direct download

You can also download the latest .zip from the GitHub Releases page.

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What you can do

• Inspect requests and responses with a fast, readable inspector.
• Mock local responses in a controlled way (no code required).
• Record sessions and reuse them for replay and testing.
• Pause traffic with breakpoints to inspect or edit on the fly.
• Connect iOS devices with guided certificate setup.

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Key tools

Rules

Define rules to answer specific requests locally. Perfect for fast mocks, edge cases, or isolating the app from external dependencies.

Collections

Record a session, keep it locally or push it to a Git repo. You can export to HAR, edit it, and reuse it. When a collection is enabled, you enter Replay mode: when the app makes the same calls, FRTMProxy responds with the previously recorded mock services.

Breakpoints

Pause requests/responses to inspect or modify them before letting them continue.

Device (iOS)

A dedicated section to connect iOS devices:

• Simulator: guided certificate installation.
• Physical device: QR code to download the certificate directly on the phone.

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UI Preview

Inspector

Light	Dark

Rules

Collections

Breakpoints

Actions

Happy debugging! 🚀

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Sparkle Release Automation

Use the helper script to build a Release app, zip it, regenerate appcast.xml, and publish artifacts to gh-pages:

./scripts/publish_sparkle_release.sh

Useful variants:

# Generate zip + appcast locally only (no push)
./scripts/publish_sparkle_release.sh --no-publish

# Reuse existing Release build output
./scripts/publish_sparkle_release.sh --skip-build

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Homebrew Cask Update (manual release flow)

After publishing a GitHub Release manually, update only the Homebrew cask metadata (version, sha256, url) with:

./scripts/update_homebrew_cask.sh \
  --version 1.6.0 \
  --tag v.1.6.0 \
  --tap-dir ~/Repositories/homebrew-frtmtools

Optional automation for the tap repository:

# commit in tap repo
./scripts/update_homebrew_cask.sh --version 1.6.0 --tag v.1.6.0 --tap-dir ~/Repositories/homebrew-frtmtools --commit

# commit + push in tap repo
./scripts/update_homebrew_cask.sh --version 1.6.0 --tag v.1.6.0 --tap-dir ~/Repositories/homebrew-frtmtools --push