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caption.sh
AI captions API for developers: send any video, get back an MP4 with word-timed, karaoke-style captions burned in. One POST, poll or webhook.
aicaptionssubtitlesvideoapimcpdevelopers
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Editor's Take
Curated by Startup List teamcaption.sh is an AI captions API built for developers and agents. Send any video and get back an MP4 with word-timed, karaoke-style captions burned in. One POST creates a job; poll for status or take a webhook; download the result. A hosted MCP server lets Claude Code, Cursor and other agents caption videos as a native tool. Prepaid usage at $0.10 per minute, charged only for successful renders.
Key Highlights
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Actively discovered by our community
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AI Video
Category classification
Listed Sept 2026
On Startup List since launch
Use Cases
Software Development
Accelerate your development workflow with AI-powered code generation, debugging, and refactoring.
Video Production
Generate and edit professional video content with AI-powered tools and effects.
Team Productivity
Integrate caption.sh into your workflow to save hours every week.
Best For
- •Founders in AI Video who need a practical tool for execution
- •Teams that want faster output with less operational overhead
- •Operators looking for actionable insights and repeatable workflows
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caption.sh FAQs
What is caption.sh best used for?
AI captions API for developers: send any video, get back an MP4 with word-timed, karaoke-style captions burned in. One POST, poll or webhook.
Is caption.sh suitable for early-stage startups?
caption.sh can be suitable for early-stage teams, especially when speed and focused execution matter more than large team complexity.
How does caption.sh compare to alternatives?
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