Sisif

Sisif is an AI video generation tool that converts text prompts into short videos, focusing on per-video billing, no watermarks, and an agent-oriented invocation method.

Purpose Users enter a text prompt, and Sisif can generate a short video. Its official positioning is suitable for scenarios such as TikTok, Reels, Shorts, ads, product clips, logo intros, travel content, and faceless channels, and it also lists common uses such as "make photos move," "make old photos move," "make photos dance," and "make family photos move."

Main capabilities

• Text-to-video: render text prompts into short videos.
• Vertical output: vertical clips for TikTok, Reels, and Shorts.
• No watermark: the official statement is that downloaded files at any price tier do not carry a watermark, and the downloaded file is the rendered file.
• Credits do not expire: purchased credits do not expire.
• Credits refunded on failed renders: when a render fails, credits are automatically returned to the account.
• Open-weight models: the official statement is that it uses open-weight video models, runs on its own GPUs, and does not go through third-party APIs.
• Prompt retention: every render on the page shows the sentence that generated it.
• Storyboard preview: for longer requests, Sisif shows the planned shots' storyboard and price before payment.
• Agent-oriented: provides an MCP server (sisif.ai/mcp), REST API, MPP one-time payment, webhooks, and n8n templates.

How to use

• Web: enter a text prompt and pay per video to generate.
• Pricing: $1 per 5-second clip, one-time payment, no subscription. Stories cost $1 per 5 seconds according to the selected length, up to 60 seconds, and the price is shown before payment.
• Free parts: registration, using prompt suggestions, and planning storyboards are free. New accounts start with 0 credits, with no free allowance and no free trial credits. You can plan 3 storyboards within 24 hours before payment, and 10 within 24 hours after payment.
• Output specifications: a 5-second clip is 540x960.
• Generation time: the official statement is that most clips are completed within 2-5 minutes, with email notification.
• Commercial use: each purchased clip can be published anywhere.
• Agent invocation: one HTTP call per clip, with terms consistent with the web. You can add the Sisif MCP server to Claude, Cursor, or your own agent, and render and pay in the same step via MPP (Stripe's Machine Payments Protocol), one-time, perclip, no pre-provisioned key, and no recurring charges.
• Regional taxes: buyers in the EU, EEA, and UK must add VAT at checkout.

Use cases Suitable for creators and marketers who need vertical short videos, such as TikTok, Reels, Shorts, ads, product clips, logo intros, travel content, and faceless channels; it is also suitable for developers who want agents to automatically generate and pay for video clips via API or MCP.

Limitations

• There is no free plan and no free trial credits; new accounts start with 0 credits.
• A single short clip is not previewed as a video before purchase; for longer requests, you can first see the storyboard and price.
• The official offering does not provide a free watermark-free version; paid clips themselves are watermark-free.
• Specific model names, parameter sizes, and support for more resolutions or duration options are not yet provided in the materials.