No watermark, everNothing expiresFailed render costs nothingYours to publish
Have a longer brief, with timecodes? Turn it into a story, $1 per 5 s.
3,231 clips generated
Clips are silent, with no voice or sound.
Terms
The receipt lists what one clip includes.
What a clip is
The spec sheet. Same for one clip or a monthly plan.
| Length | 5 seconds | Format | MP4, portrait, 540x960 (720x1280 on the ultra tier) |
|---|---|---|---|
| Turnaround | Most clips in 2-5 minutes | Delivery | Your library, an email, or a webhook |
| Watermark | None, at any price | License | Yours to publish, commercial use included |
| Failed render | Credit returned automatically | Credits | Never expire |
| Access | This page, the API, or an agent over MCP | Payment | One clip at a time, or a monthly plan; agents pay per call |
Made for TikTok · Reels · Shorts · ads · commercials · product clips · logo intros · travel · faceless channels
Popular uses Animate a photoAnimate old photosMake a photo danceAnimate family photosAnimate a memorial photoproduct videos for Shopify clothing stores
Built for agents as much as people
One HTTP call per clip, same terms as the page. Add the Sisif MCP server to Claude, Cursor or your own agent and it renders a clip and pays for it in one step, over MPP, Stripe's machine payments protocol: one-time, per clip, no key to provision and nothing recurring. Webhooks and an n8n template for the rest.
MCP server https://sisif.ai/mcp · REST API · MPP one-time payments · webhooks · n8n
curl -X POST https://sisif.ai/api/videos/generate/ \ -H "Authorization: Bearer sk_live_..." \ -H "Content-Type: application/json" \ -d '{"prompt": "3D animated movie style, a tiny fluffy orange kitten in an astronaut suit floats inside a spaceship, chasing a floating bubble of milk, big glossy eyes, soft warm lighting", "duration": 5}' # {"id": "vid_abc123", "status": "processing", "eta_seconds": 180}
Pricing
Same terms at every size. Start with one clip; the plans exist for people who render every day.
Is Sisif free?
Is Sisif free?
No. Sisif has no free tier and no free trial credits. A new account starts with 0 credits. You can plan 3 storyboards in 24 hours before you pay for a clip or a plan. After you pay, you can plan 10 storyboards in 24 hours. Rendering a video costs $1 per 5-second clip, paid once.
Is there a free AI video generator with no watermark?
Sisif is not a free generator, and it never adds a watermark. There is no watermarked free version. The $1 clip downloads as a clean MP4.
What do I get for $1?
One 5-second clip at 540x960, with no watermark, paid once, and no subscription. The credits do not expire. Buyers in the EU, EEA, and the UK see VAT added at checkout. A story costs $1 per 5 seconds of the length you choose, up to 60 seconds, and you see that price before you pay.
What happens if a render fails?
The credits return to your account automatically, so you can try another prompt.
Do I need a subscription?
No. Pay per clip. Monthly plans exist for people who render every day, but nothing forces you onto one.
Can I see what I'll get before paying?
For a longer brief, yes. Sisif shows a storyboard of the planned shots and the price before you pay. A single short clip is not shown as video before you buy it. Prompt suggestions and the example clips on this page are free to use.
What if my clip fails?
The credit returns to your account on its own. Try another prompt.
Do credits expire?
No. Clips you buy stay until you use them.
Is there ever a watermark?
No. The file you download is the file we rendered.
How long does it take?
Most clips are ready in 2-5 minutes. We email you.
Commercial use?
Yes. Every clip you buy is yours to publish anywhere.
What model is it?
An open-weights video model on GPUs we run. No third-party API in the loop.