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HookFindr Caption SRT Export
x402
HookFindr Caption SRT Export is a paid API for AI agents from api.hookfindr.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Exports video captions as a broadcast-standard SRT subtitle file from TikTok, YouTube, Instagram, X, or Twitch URLs
Price / call$0.05
Success—
StatusUnknown
How this service works
Export video captions as SRT subtitles — TikTok, YouTube, Instagram, X, Twitch. Broadcast-quality SRT subtitle file ready to upload to YouTube, IG Reels, TikTok, or any subtitle player. Word-level timestamps grouped into ~1-2s caption lines capped at 42 chars (broadcast standard).
Output
A broadcast-standard SRT subtitle file with word-level timestamps grouped into caption lines of approximately 1-2 seconds duration, capped at 42 characters per line per broadcast convention, ready to upload directly to YouTube, Instagram Reels, TikTok, or any subtitle player.
Example use cases
TikTok repurposing to YouTube Shorts
“I'm repurposing this TikTok video for YouTube Shorts and need the SRT subtitle file — can you export the captions from https://www.tiktok.com/@creator/video/987654321 in broadcast-standard format?”
Instagram Reel accessibility subtitles
“I need an SRT subtitle file from this Instagram Reel so I can add captions before uploading it to my brand's page — the video URL is https://www.instagram.com/reel/ABC123xyz/”
Twitch clip transcript for highlight video
“Can you convert the captions from this Twitch clip into an SRT file I can drop into my video editor? The clip is at https://www.twitch.tv/clips/SomeClipSlug”
Technical details
Endpoint
POSThttps://api.hookfindr.com/api/x402/caption.srtWhen to prefer
Choose this endpoint when you need a ready-to-upload SRT file specifically formatted to broadcast standards (42-char lines, 1-2s groupings) from a social video URL. Prefer it over raw transcription endpoints when the output destination is a video platform subtitle uploader rather than a text document or database. It covers TikTok, YouTube, Instagram, X, and Twitch natively via yt-dlp.
Side effects
- Video URL is private or age-restricted — returns error indicating inaccessible content
- Platform not supported or URL malformed — returns validation error
- Video has no audio track or captions — returns empty or error response
- Network timeout on long videos — may require retry
- Rate limiting or payment failure — 402 Payment Required if USDC balance insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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