Source Code

Krea.ai Image Generation Skill

Generate images using Krea.ai's API with support for multiple models including Flux, Imagen 4, Ideogram 3.0, and more.

Features

✅ Async job-based generation (POST → poll → result)
✅ Support for multiple image models
✅ Configurable parameters (width, height, steps, guidance, seed)
✅ Stdlib-only dependencies (no requests required)
✅ Secure credential handling with file permissions

Security

This skill prioritizes security:

No webhook support - Removed to prevent SSRF risks
Stdlib dependencies - Minimal attack surface (uses urllib only)
File-based credentials - Primary credential source with secure permissions
Input validation - All parameters validated before API calls

Credential Sources (in order of precedence)

CLI arguments: --key-id and --secret (for one-off use)
File: ~/.openclaw/credentials/krea.json

Note on Subprocess

The --usage flag uses webbrowser.open() (stdlib) to open the usage dashboard in a browser. No subprocess calls.

Setup

Get your Krea.ai API credentials from https://docs.krea.ai/developers/api-keys-and-billing
Create the credentials file:

mkdir -p ~/.openclaw/credentials

Add your credentials:

echo '{"apiKey": "YOUR_KEY_ID:YOUR_SECRET"}' > ~/.openclaw/credentials/krea.json

Set secure permissions:

chmod 600 ~/.openclaw/credentials/krea.json

Usage

Command Line

# Generate an image
python3 krea_api.py --prompt "A sunset over the ocean"

# With specific model
python3 krea_api.py --prompt "Cyberpunk city" --model imagen-4

# Custom size
python3 krea_api.py --prompt "Portrait" --width 1024 --height 1280

# List available models
python3 krea_api.py --list-models

# Check recent jobs
python3 krea_api.py --jobs 10

Python Script

from krea_api import KreaAPI

api = KreaAPI()  # Reads from ~/.openclaw/credentials/krea.json

# Generate and wait
urls = api.generate_and_wait(
    prompt="A serene Japanese garden",
    model="flux",
    width=1024,
    height=1024
)
print(urls)

Parameters

Parameter	Type	Default	Description
prompt	str	required	Image description (max 1800 chars)
model	str	"flux"	Model name from table below
width	int	1024	Image width (512-2368)
height	int	1024	Image height (512-2368)
steps	int	25	Generation steps (1-100)
guidance_scale	float	3.0	Guidance scale (0-24)
seed	str	None	Random seed for reproducibility

Available Models

Model	Best For
flux	General purpose, high quality
imagen-4	Latest Google model
ideogram-3.0	Text in images
seedream-4	Fast generations
nano-banana	Quick previews

Run python3 krea_api.py --list-models for full list.

Check Usage

Krea.ai doesn't provide a public usage API. Check your usage at:

https://www.krea.ai/settings/usage-statistics

Or list recent jobs:

python3 krea_api.py --jobs 10

File Locations

Purpose	Path
Credentials	`~/.openclaw/credentials/krea.json`
Script	`{skill}/krea_api.py`
Skill docs	`{skill}/SKILL.md`

Troubleshooting

"API credentials required"

Check credentials file exists:

ls -la ~/.openclaw/credentials/krea.json
# Should show: -rw-------

Verify format (must have colon):

{"apiKey": "KEY_ID:SECRET"}

⚠️ Security: Do NOT use cat to view the credentials file — it contains secrets.

Model not found

Run python3 krea_api.py --list-models to see available models.

Credits

Thanks to Claude Opus 4.5 for researching the correct API structure. The docs incorrectly suggest /v1/images/flux but the working endpoint is /generate/image/bfl/flux-1-dev.

krea-api