The terms are the product.
Every other text-to-video tool stamps a watermark on what it gives away, expires the credits you paid for, and charges you when a render fails. Sisif prints its terms on the receipt and keeps them: no watermark on any clip, nothing expires, a failed render is refunded, and the model is open weights running on hardware we operate. Price is the last line, not the first.
No watermark, at any price
The file you download is the file we rendered. There is no free tier to stamp and no plan to unlock. Why no watermark.
Open weights, our GPUs
An open model on machines we run. No third-party API in the loop, no model swap under you.
The prompt stays attached
Every render on this page shows the sentence that made it. What you type is what you get.
Agent ready
An MCP server at sisif.ai/mcp and pay-per-clip card payments over MPP. Your agent asks for a clip and pays for that one clip in the same call. No account to set up, no subscription to hold.
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 · product clips · travel · faceless channels
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.
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.