Observed arrival · 2026-10-29
Caption402 turns media links into timed subtitles
An API for AI agents that returns timed SRT and WebVTT captions, with optional translated subtitles, from direct video or audio file links.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers wiring media captioning into AI agents
- Worth noticing
- It refuses links to YouTube, TikTok, Netflix, and other streaming or social platforms; direct media files only.
Field notes
The documented request accepts direct links to files such as MP4, MOV, WebM, MP3, and WAV, while refusing streaming and social-platform links. The page says translations retain the original caption timing and allows vocabulary hints for names or product terms. It also describes an optional include_words parameter for word-level timestamps; these details are presented as API behavior on the site, not independently tested here.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue