Stability AI

At a glance

Set these per environment. See Connect an integration.

Variable	Required	Description
`STABILITY_API_KEY`	Yes	Stability AI API key (starts with sk-) Docs.

Create a Stability AI account: Sign up at https://platform.stability.ai - new accounts receive 25 free credits, enough to test image generation.
Create an API key: Open https://platform.stability.ai/account/keys and copy your API key (starts with sk-). Create a dedicated key per application if you prefer.
Store the key: Add it to your .env file as STABILITY_API_KEY=sk-…
Verify access: Run the Get Balance tool to confirm the key works, then List Engines and try Text to Image with a simple prompt.

Image generation is billed in credits per image - buy credits at https://platform.stability.ai/account/credits
Text to Image defaults the Accept header to application/json so images return as base64 artifacts (each with its seed and finishReason)
The newer v2beta Stable Image endpoints require multipart/form-data uploads and are not exposed here; tools use the JSON v1 generation API (SDXL)

Tool	Access	Description
List Engines	Read	List the generation engines (models) available to your account
Get Balance	Read	Get the credit balance of your Stability AI account
Get Account	Read	Get profile and organization details for the account that owns the API key
Text to Image	Write	Generate images from a text prompt with a Stable Diffusion engine (consumes credits)

Generate an image with Stability AI from a prompt I provide and show me the seed used.
Check my Stability AI credit balance and list the engines available to my account.