# Stable Diffusion v3.5 Large Image Generator (dopamint.ai)

> Stable Diffusion v3.5 Large Image Generator (dopamint.ai) is a paid API for AI agents from x402-dev.dopamint.ai, paid per call via x402, $0.0878/call, status down (last checked 2026-09-15).

Generates images from a text prompt using the Stable Diffusion v3.5 Large model, returning a job ID and status URL for async retrieval

## Facts

- Endpoint: POST https://x402-dev.dopamint.ai/api/ai/generations/images/stable-diffusion-v35-large
- Price: $0.0878/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-dev-dopamint-ai-9af316e3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5-XOji4mYXsk2fcxPaaXT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-dev-dopamint-ai-9af316e3 -d '<json body>'
```

Example prompt: Generate a landscape image of a misty mountain forest at sunrise using Stable Diffusion v3.5 Large — landscape 16:9 format, 1 image, and use seed 42 so I can reproduce it later.

## When to prefer this

Choose this endpoint when you need high-quality, detailed image generation using the Stable Diffusion v3.5 Large model specifically — it is preferable over nano-banana or nano-banana-pro sibling endpoints when maximum image quality and detail are priorities. Use when the user specifies SD v3.5, stable diffusion large, or needs a reliable seed-based reproducible output. Costs $0.0878 USDC per call via x402 payment protocol.

## Known failure modes

- Invalid or missing prompt returns a 400 error
- Unsupported image_size value causes a validation error
- Model overload or timeout may result in a failed job status when polling
- Payment failure (insufficient USDC) prevents the request from being processed
- seed value out of integer range returns a schema validation error
- Safety checker blocks prompt and returns no image

## How this service works

Generate image using stable-diffusion-v35-large

## Output

An async job response containing a unique jobId, a statusUrl to poll for the completed image, a human-readable message with tracking info, an ISO 8601 timestamp, and an HTTP status code. The agent must poll the statusUrl to retrieve the final generated image once processing is complete.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "prompt"
 ],
 "properties": {
  "seed": {
   "type": "integer",
   "description": "The same seed and the same prompt given to the same version of the model will output the same image every time."
  },
  "prompt": {
   "type": "string",
   "description": "The prompt to generate an image from."
  },
  "sync_mode": {
   "type": "boolean",
   "description": " If set to true, the function will wait for the image to be generated and uploaded before returning the response. This will increase the latency of the function but it allows you to get the image directly in the response without going through the CDN.\n        "
  },
  "image_size": {
   "type": "ImageSize | \"square_hd\" | \"square\" | \"portrait_4_3\" | \"portrait_16_9\" | \"landscape_4_3\" | \"landscape_16_9\"",
   "description": "The size of the generated image. You can choose between some presets or custom height and width that **must be multiples of 16**."
  },
  "num_images": {
   "type": "integer",
   "description": "The number of images to generate."
  },
  "enable_safety_checker": {
   "type": "boolean",
   "description": "If set to true, the safety checker will be enabled."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "jobId": {
  "type": "string",
  "description": "Unique job identifier"
 },
 "message": {
  "type": "string",
  "description": "Human-readable message with status tracking URL"
 },
 "statusUrl": {
  "type": "string",
  "description": "URL to check job status"
 },
 "timestamp": {
  "type": "string",
  "description": "ISO 8601 timestamp of the response"
 },
 "statusCode": {
  "type": "integer",
  "description": "HTTP status code"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-dev-dopamint-ai-9af316e3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-dev.dopamint.ai](https://www.zero.xyz/host/x402-dev.dopamint.ai/llms.txt)