SISIF

SISIF is a developer-facing text-to-video API that turns text prompts into short vertical videos in roughly 2-5 minutes. It exposes a simple REST endpoint with bearer-token auth, a polling status route, and webhook callbacks, plus a built-in n8n integration for non-code workflow automation. Output is fixed to vertical aspect ratios at 540x960 or 720x1280, clearly aimed at TikTok, Reels, and Shorts pipelines rather than cinematic horizontal video.

Pricing is credit-based with no subscription: 4 credits/sec at the high tier and 6 credits/sec at the ultra tier, with 35 free credits on signup and no card required. That makes it a reasonable pick for solo creators, marketers, and small automation shops who want to wire generative video into their existing stack without negotiating with enterprise sales. Rate limits (10/min, 100/hour, 1000/day by default) are generous enough to script but signal this is a shared API, not a dedicated GPU lease.

The page does not disclose the underlying model, which is the main caveat: you can't independently judge quality, motion fidelity, or prompt adherence without burning credits. There is also no public showcase of motion-heavy benchmarks, and the lack of horizontal output rules out broader use cases. For teams who just need to drop programmatic short-form video into an n8n or backend workflow, the API surface is refreshingly minimal.