Private beta — onboarding developers now
Image and video generation, one simple API.
Text-to-image, image editing, and image-to-video behind a single REST endpoint. Pay only for what you generate, from a prepaid balance. Prompts go to the model exactly as you send them.
- Images from
- $0.006
- Video from
- $0.05 / s
- Minimum
- $5 top-up
curl https://api.fastgencloud.com/v1/images/generations \
-H "Authorization: Bearer $FASTGEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "general-image",
"prompt": "product photo of a ceramic mug on a wooden desk, soft window light",
"size": "1024x1024"
}'{
"id": "5f2c1e0a-…",
"object": "job",
"status": "queued",
"model": "general-image",
"usage": { "charged_micros": 6000, "charged_usd": 0.006 },
"moderation": { "status": "pending" }
}Endpoints
Open-weight, commercially licensed models running on dedicated GPU capacity — plus train-your-own characters. Same request shape everywhere.
Text to imageGeneral Image
general-image
General-purpose photorealistic text-to-image on Krea 2 (12B). Write prompts as plain sentences — subject, action, clothing, setting, light, camera. Image-to-image, inpainting and trained-character generations run on a photoreal SDXL companion under this same model id.
ImageFace ID
face-id
Identity-preserving image-to-image: one reference photo of a person + a prompt → new images of the same person in the described scene, at SDXL quality. style: realistic (photoreal, default), anime, cartoon — likeness is strongest on realistic.
Image editingImage Edit
image-edit
Instruction-based image editing from 1–3 reference images: change objects, poses, styles or backgrounds, or combine subjects.
Text to imageAnime Image
anime
Anime and illustration-style text-to-image on Krea 2 (12B) with a dedicated anime style. Describe the shot in plain sentences: subject, outfit, setting, mood, camera. Image-to-image, inpainting and trained-character generations run on an Illustrious SDXL companion under this same model id.
Text to imageCartoon Image
cartoon
Western comics and cartoon-style text-to-image on Krea 2 (12B): bold line work, flat colour, expressive characters. Describe the shot in plain sentences. Image-to-image, inpainting and trained-character generations run on a Pony SDXL companion under this same model id.
Image to Video
image-to-video
Animate a still image into a 5 or 8 second clip at 32 fps. The start frame's aspect ratio is preserved.
Character trainingCharacters
POST /v1/characters
Train a reusable character from 4–30 photos of one person in ~10–15 minutes, then generate them on general-image, anime or cartoon with the character parameter. 2 free slots; packages from $10/mo.
How it works
- 01
Create an API key
Sign up, add a prepaid balance with a card, and create a key in the console.
- 02
Submit a job
POST a prompt (and optionally an image) to /v1. You get a job id back immediately.
- 03
Poll or get a webhook
Fetch /v1/jobs/{id} or receive a signed webhook when your image or video is ready.
Guides
How to build the things people actually build with a generation API. Each one ends in code you can run.
- Unfiltered image generation APISeveral of the large hosted image APIs put a policy layer between your prompt and the sampler: they rewrite what you wrote, append rating tags you never asked for, and re-classify the result before releasing it.
- Consistent characters across generated imagesDiffusion models have no memory between calls, so the same prompt gives you a different person every time.
- AI product photography with an APIOne decent photo of a product can become an entire catalogue: different surfaces, different lighting, seasonal backgrounds, ad crops.
- Animate a still image into videoImage-to-video takes a frame you already approve of and adds motion.
Simple, prepaid pricing
Add funds by card; each job is charged from your balance at the rates below. No subscriptions, no minimum monthly spend, refunds on unused balance.
| Operation | Model | Price |
|---|---|---|
| Text to image (≤ 1 MP) | general-image, anime, cartoon | $0.006 / image |
| Image edit | image-edit | $0.03 / image |
| Face ID (image to image, ≤ 1 MP) | face-id | $0.012 / image |
| Image to image, inpaint and character generations (≤ 1 MP) | general-image, anime, cartoon | $0.006 / image |
| Image to video | image-to-video | $0.05 / second |
| Character training | characters | $0.75 / training |
| Character slots — 10 | 10 characters (2 free on every account) | $10.00 / month |
| Character slots — 100 | 100 characters | $39.00 / month |
| Character slots — 500 | 500 characters | $129.00 / month |
Your product, your policy
FastGen Cloud is a general-purpose image and video API for adult developers and businesses. We do not inject prompts, steer styles, or filter what your product allows — you decide that. One line is enforced automatically on every job and cannot be turned off: nothing involving minors. Prompts, input images, and every generated output are checked for it before anything is delivered.
Read the content policy and the Acceptable Use Policy.
Get in touch
Questions about pricing, volume, or the beta? Email support@fastgencloud.com — we reply within one business day.
Contact us