# StreamCatch - Full Technical Specification & Machine-Readable Knowledge Base (2026 Edition)

## 1. System Identity & Mission
- **Application Name**: StreamCatch
- **Primary Domain**: streamcatch.net
- **Canonical Origin**: https://streamcatch.net
- **Support Contact**: support@streamcatch.net
- **DMCA / Legal Notice Contact**: dmca@streamcatch.net
- **Supported Platforms Count**: 14
- **Supported Locales**: English (en), French (fr), Spanish (es), Brazilian Portuguese (pt-BR), Arabic (ar - native RTL)
- **Architectural Paradigm**: Stateless ephemeral stream resolving, zero local disk persistence, pre-flight anti-SSRF v3 filtering, universal H.264/AAC & lossless audio muxing, deterministic programmatic SEO.

---

## 2. Security Engine & Threat Mitigation (Anti-SSRF v3)
StreamCatch processes external user-supplied URLs through a multi-tier defense engine to guarantee zero internal network probing:

1. **Protocol Strictness**: Rejects all non-HTTPS schemes (`http://`, `ftp://`, `file://`, `gopher://`).
2. **Domain Allowlist Matching**: Target hosts must strictly match or be subdomains of pre-authorized public streaming platforms and their delivery CDNs.
3. **Pre-Flight DNS Resolution**: Resolves target hostnames across IPv4 and IPv6 prior to socket initiation.
4. **IP Classification Matrix**:
   - Loopbacks blocked: `127.0.0.0/8`, `::1`
   - Current network blocked: `0.0.0.0/8`
   - RFC 1918 private subnets blocked: `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`
   - Carrier-Grade NAT (CGNAT) blocked: `100.64.0.0/10`
   - Cloud instance metadata blocked: `169.254.169.254`, `metadata.google.internal`
   - Link-local & Multicast blocked: `169.254.0.0/16`, `fe80::/10`, `224.0.0.0/4`, `ff00::/8`
5. **DNS Rebinding (TOCTOU) Socket-Pinning**: An Undici custom agent locks the TCP socket connection directly to the pre-validated IP address.

---

## 3. Master Codec & Platform Capability Matrix (14 Platforms)

### YouTube
- **Adapter ID**: `youtube`
- **Canonical Hub**: https://streamcatch.net/download/youtube
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/youtube
  * FR: https://streamcatch.net/fr/download/youtube
  * ES: https://streamcatch.net/es/download/youtube
  * PT-BR: https://streamcatch.net/pt-BR/download/youtube
  * AR: https://streamcatch.net/ar/download/youtube
- **Domain Allowlist**: youtube.com, www.youtube.com, m.youtube.com, youtu.be
- **Status**: Operational
- **How to Download from YouTube**:
  1. **Copy YouTube URL**: Copy the complete link of any public YouTube video or Short from your browser or mobile app.
  2. **Analyze Streams**: Paste the link into the analyzer above. StreamCatch runs pre-flight DNS security and resolves all available resolutions.
  3. **Download Direct**: Select your preferred container (MP4 1080p, 720p, or MP3) and click Download to stream via edge CDN.
- **Supported Content Types & Formats**:
  * **1080p Full HD MP4 Video** (`mp4-1080p`):
    - Tool URL: https://streamcatch.net/download/youtube/mp4-1080p
    - Container: MP4 (ISO Base Media)
    - Video Codec: H.264 / AVC (High Profile Level 4.2)
    - Audio Codec: AAC-LC 192kbps
    - Native Resolution: 1920x1080 (16:9)
    - Average Bitrate: 4800 kbps
    - Target Use Cases: Archival playback on smart TVs; Offline presentations and tutorials; Video editing in Premiere or DaVinci
    - Limitations: Private videos, member-only content, and geo-blocked videos cannot be resolved.; Live streams must finish processing before download.
  * **720p HD MP4 Video** (`mp4-720p`):
    - Tool URL: https://streamcatch.net/download/youtube/mp4-720p
    - Container: MP4
    - Video Codec: H.264 (Main Profile)
    - Audio Codec: AAC-LC 128kbps
    - Native Resolution: 1280x720
    - Average Bitrate: 2400 kbps
    - Target Use Cases: Fast mobile downloads on metered connections; Educational slide decks and webinars
    - Limitations: Lower pixel density on large 4K displays.
  * **320kbps MP3 Audio Master** (`mp3-audio`):
    - Tool URL: https://streamcatch.net/download/youtube/mp3-audio
    - Container: MP3 (MPEG Audio Layer III)
    - Video Codec: None (Demuxed Audio)
    - Audio Codec: MP3 Constant Bitrate 320kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 320 kbps
    - Target Use Cases: Podcasts, keynote speeches, and music stems; Car audio and personal offline listening
    - Limitations: Lossy MP3 compression. For lossless preservation of master recordings, choose FLAC where available.
  * **YouTube Shorts 1080p Vertical Video** (`shorts`):
    - Tool URL: https://streamcatch.net/download/youtube/shorts
    - Container: MP4
    - Video Codec: H.264 / AVC (60fps Vertical)
    - Audio Codec: AAC Stereo 192kbps
    - Native Resolution: 1080x1920 (9:16)
    - Average Bitrate: 4200 kbps
    - Target Use Cases: Saving vertical YouTube Shorts in full 1080x1920 HD; Mobile editing and cross-platform vertical archiving
    - Limitations: Only public or unlisted YouTube Shorts links (/shorts/...) can be resolved.
- **Technical FAQs**:
  * Q: Is StreamCatch free to use for YouTube videos?
    A: Yes. StreamCatch provides direct stream resolving with zero mandatory subscription fees or software installations.
  * Q: Are there limits on video length?
    A: Videos up to 3 hours in length can be resolved smoothly under standard sliding window rate limits.

---

### TikTok
- **Adapter ID**: `tiktok`
- **Canonical Hub**: https://streamcatch.net/download/tiktok
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/tiktok
  * FR: https://streamcatch.net/fr/download/tiktok
  * ES: https://streamcatch.net/es/download/tiktok
  * PT-BR: https://streamcatch.net/pt-BR/download/tiktok
  * AR: https://streamcatch.net/ar/download/tiktok
- **Domain Allowlist**: tiktok.com, www.tiktok.com
- **Status**: Operational
- **How to Download from TikTok**:
  1. **Copy TikTok Post Link**: Tap Share on any TikTok video and choose Copy Link.
  2. **Analyze Link**: Paste the link into StreamCatch to resolve the direct progressive video stream.
  3. **Save Video**: Click Download to receive your pristine vertical MP4 file instantly.
- **Supported Content Types & Formats**:
  * **HD Vertical MP4 Video** (`mp4`):
    - Tool URL: https://streamcatch.net/download/tiktok/mp4
    - Container: MP4
    - Video Codec: H.264 / AVC
    - Audio Codec: AAC Stereo
    - Native Resolution: 1080x1920 (9:16 vertical)
    - Average Bitrate: 3200 kbps
    - Target Use Cases: Social media content repurposing; Mobile offline playback; Vertical video editing
    - Limitations: Private accounts and friends-only videos cannot be indexed or resolved.
  * **TikTok Story Downloader (No Watermark)** (`stories`):
    - Tool URL: https://streamcatch.net/download/tiktok/stories
    - Container: MP4
    - Video Codec: H.264 (AVC)
    - Audio Codec: AAC Stereo
    - Native Resolution: 1080x1920 (Vertical)
    - Average Bitrate: 3000 kbps
    - Target Use Cases: Saving public TikTok Stories before 24-hour expiration; Archiving creator behind-the-scenes clips without watermarks
    - Limitations: Stories must still be active (within 24h) and published on a public TikTok profile.
  * **TikTok Original Sound MP3 Downloader** (`audio-mp3`):
    - Tool URL: https://streamcatch.net/download/tiktok/audio-mp3
    - Container: MP3
    - Video Codec: None
    - Audio Codec: MP3 Stereo 192-320kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 192 kbps
    - Target Use Cases: Extracting trending TikTok audio stems for video editing; Offline listening to viral songs and voiceovers
    - Limitations: Muted videos due to copyright expiration do not contain an extractable audio track.
- **Technical FAQs**:
  * Q: Does StreamCatch store TikTok videos on servers?
    A: No. StreamCatch issues short-lived 5-minute signed stream tickets directly from upstream CDNs. Zero media files are stored on our servers.

---

### Instagram
- **Adapter ID**: `instagram`
- **Canonical Hub**: https://streamcatch.net/download/instagram
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/instagram
  * FR: https://streamcatch.net/fr/download/instagram
  * ES: https://streamcatch.net/es/download/instagram
  * PT-BR: https://streamcatch.net/pt-BR/download/instagram
  * AR: https://streamcatch.net/ar/download/instagram
- **Domain Allowlist**: instagram.com, www.instagram.com
- **Status**: Operational
- **How to Download from Instagram**:
  1. **Copy Reel Link**: Tap the three dots on the Instagram Reel and select Copy Link.
  2. **Inspect Media**: Paste into StreamCatch to resolve the CDN stream directly.
  3. **Download File**: Save the 1080p MP4 file to your photo library or disk.
- **Supported Content Types & Formats**:
  * **1080p Vertical Reel MP4** (`reels`):
    - Tool URL: https://streamcatch.net/download/instagram/reels
    - Container: MP4
    - Video Codec: H.264 (High Profile)
    - Audio Codec: AAC Stereo 192k
    - Native Resolution: 1080x1920
    - Average Bitrate: 4200 kbps
    - Target Use Cases: Reel portfolio archiving; Cross-platform marketing; Offline inspiration moodboards
    - Limitations: Stories older than 24 hours and private accounts are strictly inaccessible.
  * **Instagram Story & Highlights Downloader** (`stories`):
    - Tool URL: https://streamcatch.net/download/instagram/stories
    - Container: MP4
    - Video Codec: H.264 (High Profile)
    - Audio Codec: AAC Stereo
    - Native Resolution: 1080x1920 (9:16)
    - Average Bitrate: 3500 kbps
    - Target Use Cases: Saving public Instagram Stories and Highlights in 1080p MP4; Archiving brand announcements and event recaps
    - Limitations: Close-friends stories and private accounts cannot be accessed.
  * **Instagram Video Post & Carousel Downloader** (`videos`):
    - Tool URL: https://streamcatch.net/download/instagram/videos
    - Container: MP4
    - Video Codec: H.264 (AVC)
    - Audio Codec: AAC Stereo 192k
    - Native Resolution: 1080p HD
    - Average Bitrate: 3800 kbps
    - Target Use Cases: Downloading standard Instagram feed videos (/p/...) and multi-slide video carousels; Offline creative reference
    - Limitations: Public feed posts only.
  * **Instagram Reel Audio to MP3 Extractor** (`audio-mp3`):
    - Tool URL: https://streamcatch.net/download/instagram/audio-mp3
    - Container: MP3
    - Video Codec: None
    - Audio Codec: MP3 192kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 192 kbps
    - Target Use Cases: Converting Instagram Reel sounds and voiceovers into standalone MP3 files; Podcast and editing soundbeds
    - Limitations: Reels without audio tracks cannot be converted to MP3.
- **Technical FAQs**:
  * Q: Does this work on mobile Safari?
    A: Yes. On iOS Safari, tap the download button and choose Save to Files or Save Video to Photos.

---

### Facebook
- **Adapter ID**: `facebook`
- **Canonical Hub**: https://streamcatch.net/download/facebook
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/facebook
  * FR: https://streamcatch.net/fr/download/facebook
  * ES: https://streamcatch.net/es/download/facebook
  * PT-BR: https://streamcatch.net/pt-BR/download/facebook
  * AR: https://streamcatch.net/ar/download/facebook
- **Domain Allowlist**: facebook.com, www.facebook.com, fb.watch, m.facebook.com
- **Status**: Operational
- **How to Download from Facebook**:
  1. **Copy Video URL**: Copy the URL from the address bar or tap Share and Copy Link on Facebook.
  2. **Paste & Select**: Paste into StreamCatch and pick between HD and SD resolution streams.
  3. **Stream & Download**: Download the file directly without intermediate popups.
- **Supported Content Types & Formats**:
  * **1080p Full HD Facebook Video** (`mp4-hd`):
    - Tool URL: https://streamcatch.net/download/facebook/mp4-hd
    - Container: MP4
    - Video Codec: H.264
    - Audio Codec: AAC
    - Native Resolution: 1920x1080
    - Average Bitrate: 4500 kbps
    - Target Use Cases: Archiving community interviews; Offline playback on laptops; Event keynote reviews
    - Limitations: Closed group posts and private personal feed items cannot be accessed.
  * **Facebook Reels Downloader (1080p HD)** (`reels`):
    - Tool URL: https://streamcatch.net/download/facebook/reels
    - Container: MP4
    - Video Codec: H.264 (AVC)
    - Audio Codec: AAC Stereo
    - Native Resolution: 1080x1920 (Vertical)
    - Average Bitrate: 3800 kbps
    - Target Use Cases: Downloading public Facebook Reels (/reel/...) in 1080p vertical MP4; Cross-platform creator archiving
    - Limitations: Only public Facebook Reels can be resolved.
  * **Facebook Public Story Video Downloader** (`stories`):
    - Tool URL: https://streamcatch.net/download/facebook/stories
    - Container: MP4
    - Video Codec: H.264
    - Audio Codec: AAC
    - Native Resolution: 1080x1920
    - Average Bitrate: 3200 kbps
    - Target Use Cases: Archiving public page Stories and event clips; Mobile offline viewing
    - Limitations: Friends-only private Facebook Stories cannot be accessed.
- **Technical FAQs**:
  * Q: Can I download Facebook Live streams?
    A: Yes, once the live stream has concluded and Facebook has processed the archive video.

---

### X (Twitter)
- **Adapter ID**: `x`
- **Canonical Hub**: https://streamcatch.net/download/x
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/x
  * FR: https://streamcatch.net/fr/download/x
  * ES: https://streamcatch.net/es/download/x
  * PT-BR: https://streamcatch.net/pt-BR/download/x
  * AR: https://streamcatch.net/ar/download/x
- **Domain Allowlist**: x.com, twitter.com, www.twitter.com
- **Status**: Operational
- **How to Download from X (Twitter)**:
  1. **Copy Post Link**: Click the share icon on the tweet and select Copy Link to Post.
  2. **Resolve Stream**: Paste the link into StreamCatch to inspect available bitrates.
  3. **Download MP4**: Save the progressive MP4 clip directly to your device.
- **Supported Content Types & Formats**:
  * **720p HD MP4 Clip** (`mp4`):
    - Tool URL: https://streamcatch.net/download/x/mp4
    - Container: MP4
    - Video Codec: H.264 / AVC
    - Audio Codec: AAC
    - Native Resolution: 1280x720
    - Average Bitrate: 2400 kbps
    - Target Use Cases: Archiving news breaking clips; Research and reference citation; Educational slide integration
    - Limitations: Protected accounts (private tweets) cannot be parsed or resolved.
  * **X (Twitter) Animated GIF to MP4 Downloader** (`gifs`):
    - Tool URL: https://streamcatch.net/download/x/gifs
    - Container: MP4
    - Video Codec: H.264 (Looping Stream)
    - Audio Codec: None
    - Native Resolution: Native Aspect Ratio
    - Average Bitrate: 1200 kbps
    - Target Use Cases: Saving reaction GIFs and looping animations from X posts; Embedding clean MP4 loops into presentations and messaging apps
    - Limitations: Public X posts only.
- **Technical FAQs**:
  * Q: Can I download audio-only from X Spaces?
    A: Recorded public Spaces replays with available stream endpoints can be resolved into MP3 audio.

---

### LinkedIn
- **Adapter ID**: `linkedin`
- **Canonical Hub**: https://streamcatch.net/download/linkedin
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/linkedin
  * FR: https://streamcatch.net/fr/download/linkedin
  * ES: https://streamcatch.net/es/download/linkedin
  * PT-BR: https://streamcatch.net/pt-BR/download/linkedin
  * AR: https://streamcatch.net/ar/download/linkedin
- **Domain Allowlist**: linkedin.com, www.linkedin.com
- **Status**: Operational
- **How to Download from LinkedIn**:
  1. **Copy LinkedIn Post URL**: Click the three dots in the upper right corner of the LinkedIn post and click Copy link to post.
  2. **Analyze Post**: Paste the link into StreamCatch to resolve the progressive MP4 stream.
  3. **Save Presentation**: Download your video for offline training or boardroom reviews.
- **Supported Content Types & Formats**:
  * **1080p Pro MP4 Video** (`mp4`):
    - Tool URL: https://streamcatch.net/download/linkedin/mp4
    - Container: MP4
    - Video Codec: H.264
    - Audio Codec: AAC
    - Native Resolution: 1920x1080
    - Average Bitrate: 4000 kbps
    - Target Use Cases: Internal corporate training and offline seminars; Conference presentation backups
    - Limitations: Videos within private corporate intranet groups cannot be resolved.
- **Technical FAQs**:
  * Q: Are video downloads secure?
    A: All transfers occur over HTTPS with DNS pre-flight verification against SSRF vulnerabilities.

---

### Vimeo
- **Adapter ID**: `vimeo`
- **Canonical Hub**: https://streamcatch.net/download/vimeo
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/vimeo
  * FR: https://streamcatch.net/fr/download/vimeo
  * ES: https://streamcatch.net/es/download/vimeo
  * PT-BR: https://streamcatch.net/pt-BR/download/vimeo
  * AR: https://streamcatch.net/ar/download/vimeo
- **Domain Allowlist**: vimeo.com, player.vimeo.com
- **Status**: Operational
- **How to Download from Vimeo**:
  1. **Copy Vimeo URL**: Copy the URL from vimeo.com/video_id directly from your browser bar.
  2. **Inspect Master Codecs**: Paste into StreamCatch to examine framerates, bitrates, and audio tracks.
  3. **Download Signed Stream**: Generate your 5-minute signed ticket and stream directly from the CDN.
- **Supported Content Types & Formats**:
  * **1080p Full HD MP4 Video** (`1080p-mp4`):
    - Tool URL: https://streamcatch.net/download/vimeo/1080p-mp4
    - Container: MP4 (MPEG-4 Part 14)
    - Video Codec: H.264 / MPEG-4 AVC (High Profile Level 4.2)
    - Audio Codec: AAC-LC (Advanced Audio Coding)
    - Native Resolution: 1920x1080 (16:9 widescreen)
    - Average Bitrate: 6500 kbps
    - Target Use Cases: Broadcast client presentations and portfolio reviews; Local offline archiving of filmmaker uploads; Non-linear editing in Adobe Premiere Pro and DaVinci Resolve
    - Limitations: Password-protected Vimeo Showcase links must be set to public or unlisted with embed permissions.
  * **720p HD MP4 Video** (`720p-mp4`):
    - Tool URL: https://streamcatch.net/download/vimeo/720p-mp4
    - Container: MP4
    - Video Codec: H.264 / AVC (Main Profile)
    - Audio Codec: AAC-LC 192k
    - Native Resolution: 1280x720 (16:9)
    - Average Bitrate: 3200 kbps
    - Target Use Cases: Bandwidth-conscious mobile offline streaming; Email and chat attachments under common 50MB file size limits
    - Limitations: Lower resolution than 1080p master on 4K computer monitors.
  * **Studio Audio Master MP3 320kbps** (`audio-mp3`):
    - Tool URL: https://streamcatch.net/download/vimeo/audio-mp3
    - Container: MP3 (MPEG-1 Audio Layer III)
    - Video Codec: None (Demuxed Audio Stream)
    - Audio Codec: MP3 Constant Bitrate 320 kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 320 kbps
    - Target Use Cases: Extracting film soundtracks, keynote speeches, and music stems; Car audio and portable offline audio player synchronization
    - Limitations: Lossy compression format. For bit-identical preservation, choose FLAC where available.
- **Technical FAQs**:
  * Q: Does StreamCatch support Vimeo On Demand?
    A: No. Paid transactional or rental content protected by DRM is strictly disallowed.

---

### Dailymotion
- **Adapter ID**: `dailymotion`
- **Canonical Hub**: https://streamcatch.net/download/dailymotion
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/dailymotion
  * FR: https://streamcatch.net/fr/download/dailymotion
  * ES: https://streamcatch.net/es/download/dailymotion
  * PT-BR: https://streamcatch.net/pt-BR/download/dailymotion
  * AR: https://streamcatch.net/ar/download/dailymotion
- **Domain Allowlist**: dailymotion.com, www.dailymotion.com, geo.dailymotion.com
- **Status**: Operational
- **How to Download from Dailymotion**:
  1. **Copy Video Link**: Copy the link from your browser or Dailymotion share menu.
  2. **Analyze URL**: Paste into StreamCatch to inspect available resolutions.
  3. **Download MP4**: Stream the MP4 file directly to your disk.
- **Supported Content Types & Formats**:
  * **1080p HD Dailymotion Video** (`1080p-mp4`):
    - Tool URL: https://streamcatch.net/download/dailymotion/1080p-mp4
    - Container: MP4
    - Video Codec: H.264
    - Audio Codec: AAC
    - Native Resolution: 1920x1080
    - Average Bitrate: 4200 kbps
    - Target Use Cases: Documentary research and journalism archiving; Offline playback on smart screens
    - Limitations: Geo-blocked broadcast content cannot be resolved outside licensed regions.
- **Technical FAQs**:
  * Q: Are Dailymotion downloads free?
    A: Yes. Free direct stream extraction with no registration required.

---

### Twitch
- **Adapter ID**: `twitch`
- **Canonical Hub**: https://streamcatch.net/download/twitch
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/twitch
  * FR: https://streamcatch.net/fr/download/twitch
  * ES: https://streamcatch.net/es/download/twitch
  * PT-BR: https://streamcatch.net/pt-BR/download/twitch
  * AR: https://streamcatch.net/ar/download/twitch
- **Domain Allowlist**: twitch.tv, www.twitch.tv, clips.twitch.tv
- **Status**: Operational
- **How to Download from Twitch**:
  1. **Copy Twitch Clip Link**: Click the share icon on any public Twitch clip and copy the link.
  2. **Paste in StreamCatch**: Inspect the 60fps video stream and audio tracks.
  3. **Save Highlight**: Download the progressive MP4 clip directly.
- **Supported Content Types & Formats**:
  * **1080p 60fps Gaming Clip MP4** (`clips`):
    - Tool URL: https://streamcatch.net/download/twitch/clips
    - Container: MP4
    - Video Codec: H.264 (High Profile 60fps)
    - Audio Codec: AAC 192k
    - Native Resolution: 1920x1080
    - Average Bitrate: 6000 kbps
    - Target Use Cases: Esports highlights compilation and montage editing; Creator reaction channels; Offline clip archiving
    - Limitations: Subscriber-only VOD archives are not accessible.
- **Technical FAQs**:
  * Q: Can I download full 8-hour live streams?
    A: We specialize in clips and highlights up to 3 hours in duration.

---

### Pinterest
- **Adapter ID**: `pinterest`
- **Canonical Hub**: https://streamcatch.net/download/pinterest
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/pinterest
  * FR: https://streamcatch.net/fr/download/pinterest
  * ES: https://streamcatch.net/es/download/pinterest
  * PT-BR: https://streamcatch.net/pt-BR/download/pinterest
  * AR: https://streamcatch.net/ar/download/pinterest
- **Domain Allowlist**: pinterest.com, www.pinterest.com, pin.it
- **Status**: Operational
- **How to Download from Pinterest**:
  1. **Copy Pin Link**: Tap Share on any Pinterest video pin and select Copy Link.
  2. **Resolve in StreamCatch**: Paste to retrieve the original progressive MP4 stream.
  3. **Save to Gallery**: Save directly to your camera roll or desktop folder.
- **Supported Content Types & Formats**:
  * **HD Idea Pin MP4 Video** (`video`):
    - Tool URL: https://streamcatch.net/download/pinterest/video
    - Container: MP4
    - Video Codec: H.264
    - Audio Codec: AAC
    - Native Resolution: 1080x1920 (Vertical 9:16)
    - Average Bitrate: 3800 kbps
    - Target Use Cases: Craft and DIY tutorial archiving; Culinary recipe preservation; Design inspiration boards
    - Limitations: Secret boards requiring login cannot be accessed.
- **Technical FAQs**:
  * Q: Can I download Pinterest videos on iPhone?
    A: Yes. Open StreamCatch in Safari, paste your link, and tap Download to save to Files or Photos.

---

### SoundCloud
- **Adapter ID**: `soundcloud`
- **Canonical Hub**: https://streamcatch.net/download/soundcloud
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/soundcloud
  * FR: https://streamcatch.net/fr/download/soundcloud
  * ES: https://streamcatch.net/es/download/soundcloud
  * PT-BR: https://streamcatch.net/pt-BR/download/soundcloud
  * AR: https://streamcatch.net/ar/download/soundcloud
- **Domain Allowlist**: soundcloud.com, www.soundcloud.com
- **Status**: Operational
- **How to Download from SoundCloud**:
  1. **Copy Track Link**: Copy the SoundCloud song or DJ set URL from your browser.
  2. **Analyze Audio**: Paste into StreamCatch to inspect audio streams and track bitrate.
  3. **Download MP3**: Save your 320kbps audio master directly to your library.
- **Supported Content Types & Formats**:
  * **Master MP3 320kbps Audio** (`mp3`):
    - Tool URL: https://streamcatch.net/download/soundcloud/mp3
    - Container: MP3
    - Video Codec: None (Pure Audio)
    - Audio Codec: MP3 Constant Bitrate 320kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 320 kbps
    - Target Use Cases: DJ practice and offline mix testing; Audiophile personal music collection; Commute listening on portable players
    - Limitations: SoundCloud Go+ premium subscription-locked streams cannot be resolved.
- **Technical FAQs**:
  * Q: Is the download speed throttled?
    A: No. Downloads stream directly from edge CDNs at maximum connection speeds.

---

### Internet Archive
- **Adapter ID**: `archive-org`
- **Canonical Hub**: https://streamcatch.net/download/archive-org
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/archive-org
  * FR: https://streamcatch.net/fr/download/archive-org
  * ES: https://streamcatch.net/es/download/archive-org
  * PT-BR: https://streamcatch.net/pt-BR/download/archive-org
  * AR: https://streamcatch.net/ar/download/archive-org
- **Domain Allowlist**: archive.org
- **Status**: Operational
- **How to Download from Internet Archive**:
  1. **Locate Archive Item**: Copy the URL from archive.org/details/item_identifier.
  2. **Inspect Formats**: Paste into StreamCatch to explore all master audio and video containers.
  3. **Download Master**: Save archival quality files directly to your storage array.
- **Supported Content Types & Formats**:
  * **Lossless Archival Master FLAC** (`audio-flac`):
    - Tool URL: https://streamcatch.net/download/archive-org/audio-flac
    - Container: FLAC (Free Lossless Audio Codec)
    - Video Codec: None (Bit-for-Bit Audio)
    - Audio Codec: FLAC 24-bit 96kHz / 48kHz
    - Native Resolution: Audio Only
    - Average Bitrate: 1411 kbps
    - Target Use Cases: Audiophile reference listening and vinyl preservation; Music production sampling and sound design Foley stems; Institutional archiving and historical sound restoration
    - Limitations: Larger file footprint (approx 30MB to 70MB per audio file).
  * **1080p Open Domain MP4 Video** (`1080p-mp4`):
    - Tool URL: https://streamcatch.net/download/archive-org/1080p-mp4
    - Container: MP4
    - Video Codec: H.264 (Baseline / Main)
    - Audio Codec: AAC Stereo 192k
    - Native Resolution: 1920x1080
    - Average Bitrate: 4200 kbps
    - Target Use Cases: Documentary b-roll and historical footage research; Classroom film preservation projects
    - Limitations: Historical film scans may reflect vintage film grain.
- **Technical FAQs**:
  * Q: Can I use this footage in commercial films?
    A: Yes, if the underlying work has fully entered the public domain. Verify the copyright assessment on the item details page.

---

### Wikimedia Commons
- **Adapter ID**: `wikimedia`
- **Canonical Hub**: https://streamcatch.net/download/wikimedia
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/wikimedia
  * FR: https://streamcatch.net/fr/download/wikimedia
  * ES: https://streamcatch.net/es/download/wikimedia
  * PT-BR: https://streamcatch.net/pt-BR/download/wikimedia
  * AR: https://streamcatch.net/ar/download/wikimedia
- **Domain Allowlist**: upload.wikimedia.org, commons.wikimedia.org, wikimedia.org
- **Status**: Operational
- **How to Download from Wikimedia Commons**:
  1. **Copy Wikimedia Commons File Link**: Copy the URL from commons.wikimedia.org/wiki/File:... from your browser.
  2. **Inspect Codecs**: StreamCatch extracts the unthrottled high-bitrate WebM or OGV media stream.
  3. **Download 4K Media**: Save pristine scientific and educational video assets directly to your system.
- **Supported Content Types & Formats**:
  * **4K Ultra HD WebM Video (VP9)** (`4k-webm`):
    - Tool URL: https://streamcatch.net/download/wikimedia/4k-webm
    - Container: WebM (Matroska subset)
    - Video Codec: Google VP9 (Profile 0)
    - Audio Codec: Opus Interactive Audio Codec
    - Native Resolution: 3840x2160 (2160p UHD)
    - Average Bitrate: 18000 kbps
    - Target Use Cases: Ultra high-definition nature, astronomical, and scientific b-roll; Displaying reference animations on 4K OLED screens; Open-source multimedia educational presentations
    - Limitations: VP9 4K decoding requires a modern GPU with dedicated VP9 hardware decoding blocks.
- **Technical FAQs**:
  * Q: Are Wikimedia Commons files completely free?
    A: Yes. Files on Wikimedia Commons are licensed under open licenses like CC-BY, CC-BY-SA, or Public Domain.

---

### Snapchat
- **Adapter ID**: `snapchat`
- **Canonical Hub**: https://streamcatch.net/download/snapchat
- **Localized Hubs**:
  * EN: https://streamcatch.net/download/snapchat
  * FR: https://streamcatch.net/fr/download/snapchat
  * ES: https://streamcatch.net/es/download/snapchat
  * PT-BR: https://streamcatch.net/pt-BR/download/snapchat
  * AR: https://streamcatch.net/ar/download/snapchat
- **Domain Allowlist**: snapchat.com, www.snapchat.com, story.snapchat.com, t.snapchat.com
- **Status**: Operational
- **How to Download from Snapchat**:
  1. **Copy Snapchat Link**: Tap Share on any public Snapchat Spotlight or Story and select Copy Link.
  2. **Paste & Analyze**: Paste the URL into StreamCatch to inspect the 1080p MP4 stream.
  3. **Save MP4 or MP3**: Download the vertical video or audio track directly to your device.
- **Supported Content Types & Formats**:
  * **1080p Vertical Spotlight MP4** (`spotlight-mp4`):
    - Tool URL: https://streamcatch.net/download/snapchat/spotlight-mp4
    - Container: MP4
    - Video Codec: H.264 / AVC (High Profile)
    - Audio Codec: AAC Stereo 192kbps
    - Native Resolution: 1080x1920 (9:16 Vertical)
    - Average Bitrate: 4200 kbps
    - Target Use Cases: Archiving viral Snapchat Spotlight clips; Cross-platform vertical editing in CapCut or Premiere; Offline mobile viewing
    - Limitations: Private friend-to-friend Snaps and disappearing messages are strictly inaccessible.
  * **Original Snap Sound MP3 (320kbps)** (`audio-mp3`):
    - Tool URL: https://streamcatch.net/download/snapchat/audio-mp3
    - Container: MP3
    - Video Codec: None
    - Audio Codec: MP3 320kbps
    - Native Resolution: Audio Only
    - Average Bitrate: 320 kbps
    - Target Use Cases: Extracting trending Spotlight audio tracks; Sound design and voiceover reference
    - Limitations: Only available on public Spotlight or Story videos that contain an audio track.
  * **Snapchat Public Story Downloader (HD MP4)** (`stories`):
    - Tool URL: https://streamcatch.net/download/snapchat/stories
    - Container: MP4
    - Video Codec: H.264 (AVC)
    - Audio Codec: AAC Stereo
    - Native Resolution: 1080x1920 (Vertical)
    - Average Bitrate: 3800 kbps
    - Target Use Cases: Saving public Snap Star and Creator Stories before expiration; Offline mobile playback in universal H.264 MP4
    - Limitations: Only public creator stories (story.snapchat.com) can be resolved. Private friend snaps are inaccessible.
- **Technical FAQs**:
  * Q: Can I download private Snapchat stories?
    A: No. StreamCatch only resolves public Spotlight videos and public creator stories.


---

## 4. Public API Contracts

All endpoints are stateless, HTTPS-only, and rate-limited per client IP.

### POST /api/v1/media/resolve
- **Request Body**: `{ "url": "<platform media URL>" }`
- **Purpose**: Validates the URL through the anti-SSRF v3 engine, then resolves metadata (title, duration, thumbnail, available formats) without storing anything.
- **Response**: Resolved media descriptor including the detected adapter ID and the list of downloadable formats.

### POST /api/v1/media/download-ticket
- **Request Body**: `{ "url": "<platform media URL>", "formatId": "<format identifier>" }`
- **Purpose**: Issues a short-lived, single-use download ticket for the selected format.
- **Response**: `downloadUrl` pointing to `/api/v1/media/stream`, plus the ticket signature and expiry.
- **Signing**: Tickets are bound with a domain-separated **HMAC-SHA256** signature covering every critical parameter (ticket ID, media ID, format ID, container, source URL, expiry), so any tampering invalidates the ticket.

### GET /api/v1/media/stream
- **Query Parameters**: `ticketId`, `expiresAt`, `sig`, `mediaId`, `formatId`, `container`, `fn` (filename), optional `su` (source URL).
- **Purpose**: Verifies the HMAC signature in constant time and proxies the media bytes to the client.
- **Behavior**: Zero-storage streaming with byte-range passthrough; the signature and expiry are re-validated on every request.

---

## 5. Engineering Articles & Technical Research
### MP4 (H.264) vs WebM (VP9): Modern Video Container Comparison & Streaming Efficiency
- **URL**: https://streamcatch.net/blog/mp4-vs-webm-container-comparison
- **Category**: Video Engineering
- **Summary**: Detailed technical analysis of H.264 and VP9 codecs regarding bitrate efficiency, hardware decoding, and NLE timeline compatibility.

### 24-Bit FLAC vs 320kbps MP3: Audiophile Preservation vs Practical Portability
- **URL**: https://streamcatch.net/blog/flac-vs-320kbps-mp3-audio-preservation
- **Category**: Audio Codecs
- **Summary**: How bit-for-bit lossless FLAC compression differs from psychoacoustic MP3 encoding for archival and music production.

### Why Server-Side Request Forgery (SSRF) Defense Matters in Media Resolvers
- **URL**: https://streamcatch.net/blog/anti-ssrf-defense-in-media-resolvers
- **Category**: Network Security
- **Summary**: How DNS pre-flight verification and Undici socket IP pinning neutralize TOCTOU rebinding attacks against cloud metadata.

### Zero-Storage Stream Resolvers vs Legacy Video Downloaders: 2026 Architecture Comparison
- **URL**: https://streamcatch.net/blog/zero-storage-stream-resolvers-vs-legacy-downloaders-2026
- **Category**: Architecture Benchmark
- **Summary**: Why modern ephemeral H.264/VP9 stream resolvers with anti-SSRF security replace legacy ad-heavy redirect tools in 2026.