Seinari

No key, no sign-up. POST https://seinari.ai/v1/generate with JSON; the answer has the picture in base64.

prompt

What to draw, 1 to 400 characters. Required.

model

fast is Fast (FLUX.2 Klein 4B, 512×512, the default). quality is Quality (FLUX 3 Klein / Klein 3, 1024×1024).

seed

0 to 2147483647. Repeats the drawing request; cards or runtime updates can change the picture. Leave out for a new random seed.

format

"image", or an Accept: image/jpeg header, returns the JPEG itself instead of JSON.

Fast uses an always-on SaladCloud fleet with no wake delay, with Jay as fallback. Quality runs on Jay when available. Capacity limits return 429 with Retry-After, not a per-user quota; unavailable capacity returns 503. Full docs