# Stability AI API

**Provider:** Stability AI
**Category:** ai
**Base URL:** `https://api.stability.ai/v2beta`
**Auth:** bearer — `Authorization: Bearer sk-...`
**Rate Limit:** 150 requests/10s
**Free Tier:** Yes — [object Object]
**Pricing:** from $0.07/mo (pay-as-you-go)
**Docs:** https://platform.stability.ai/docs/api-reference

## Description

Stability AI's REST API provides access to Stable Diffusion 3.5, SDXL, and Stable Video Diffusion. Generate high-quality images from text prompts, transform existing images, upscale, remove backgrounds, and generate short video clips.

## Endpoints

| Method | Endpoint | Description |
|--------|----------|-------------|
| POST | `https://api.stability.ai/v2beta/stable-image/generate/sd3` | Text-to-image with Stable Diffusion 3.5 |
| POST | `https://api.stability.ai/v2beta/stable-image/generate/core` | Core text-to-image generation |
| POST | `https://api.stability.ai/v2beta/stable-image/upscale/conservative` | Upscale an image up to 4x |
| POST | `https://api.stability.ai/v2beta/stable-image/edit/remove-background` | Remove image background |
| POST | `https://api.stability.ai/v2beta/image-to-video` | Generate video from an image |

## Authentication

Bearer token authentication using your Stability AI API key.

```
Authorization: Bearer sk-...
```

## Sample Request

```bash
curl https://api.stability.ai/v2beta/stable-image/generate/sd3 \
  -H "Authorization: Bearer $STABILITY_API_KEY" \
  -H "Accept: image/*" \
  -F prompt="A photorealistic mountain lake at golden hour" \
  -F aspect_ratio="16:9" \
  -F model="sd3.5-large" \
  --output image.png
```

## Sample Response

```json
# Returns raw image bytes (PNG/JPEG)
# Headers include:
Content-Type: image/png
Stability-Finish-Reason: SUCCESS
Stability-Seed: 3456789
```

## Pricing Details

Credits: $10 = 1,000 credits. SD3.5 Large: 6.5 credits/image. SDXL 1.0: 0.2 credits/image. Video: 20 credits/clip.

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*Source: [API Map](https://apimap.dev/apis/stability-ai/) — CC BY 4.0*