# POST Validate an AI sign design source create

Dry-runs `POST /api/v3/ai-sign-design-sources` with the same body. It returns the problem the create would return, or a verdict that the create would succeed. Requires `ai_sign_designs:write`. Nothing is created, no target is minted, no idempotency key is used, no budget is spent and no credit is reserved.

- Source URL: https://www.signcustomiser.com/help/api/v3-post-validate-an-ai-sign-design-source-create/
- Markdown URL: https://www.signcustomiser.com/help/api/v3-post-validate-an-ai-sign-design-source-create.md
- Group: AI sign designs
- Method: POST
- Path: /api/v3/ai-sign-design-sources/validate-create
- Auth: Bearer token
- Required scopes: `ai_sign_designs:write`

## Body parameters

- filename (string, optional): No description provided.
- content_type (string, optional): No description provided.
- byte_size (integer, optional): No description provided.

## Request body example

```json
{
  "filename": "shopfront-logo.png",
  "content_type": "image/png",
  "byte_size": 482133
}
```

## cURL example

```bash
curl https://web.signcustomiser.com/api/v3/ai-sign-design-sources/validate-create \
  --request POST \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "filename": "shopfront-logo.png",
  "content_type": "image/png",
  "byte_size": 482133
}'
```

## Response examples

### 200 POST 200 example 1

```json
{
  "data": {
    "object": "ai_sign_design_source_validation",
    "operation": "create",
    "valid": true
  },
  "links": {
    "self": "https://web.signcustomiser.com/api/v3/ai-sign-design-sources/validate-create",
    "documentation": "https://www.signcustomiser.com/help/api/"
  },
  "meta": {
    "api_version": "v3",
    "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
  }
}
```

### 401 Missing API key

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/missing_api_key",
  "title": "Missing API key",
  "status": 401,
  "code": "missing_api_key",
  "detail": "Provide a store API key as a bearer token.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 403 Insufficient scope

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/insufficient_scope",
  "title": "Insufficient scope",
  "status": 403,
  "code": "insufficient_scope",
  "detail": "This operation requires the ai_sign_designs:write scope.",
  "required_scopes": [
    "ai_sign_designs:write"
  ],
  "granted_scopes": [
    "ai_sign_designs:read"
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 404 Not released for this store

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/not_found",
  "title": "Not found",
  "status": 404,
  "code": "not_found",
  "detail": "The requested endpoint does not exist. The API reference lists every available operation: https://www.signcustomiser.com/help/api/",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 422 File too large

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/source_size_exceeded",
  "title": "Source size exceeded",
  "status": 422,
  "code": "source_size_exceeded",
  "detail": "An AI sign design source must not exceed 5242880 bytes, and this one declares 9437184.",
  "errors": [
    {
      "pointer": "/byte_size",
      "code": "source_size_exceeded",
      "detail": "An AI sign design source must not exceed 5242880 bytes, and this one declares 9437184."
    }
  ],
  "max_byte_size": 5242880,
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 429 Rate limited

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/rate_limited",
  "title": "Too many requests",
  "status": 429,
  "code": "rate_limited",
  "detail": "You have exceeded the request limit for this API key.",
  "retry_after": 60,
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```

### 503 AI sign designer turned off

```json
{
  "type": "https://www.signcustomiser.com/help/api/problems/ai_sign_designer_unavailable",
  "title": "AI sign designer unavailable",
  "status": 503,
  "code": "ai_sign_designer_unavailable",
  "detail": "The AI sign designer is turned off for this store. Sources and designs that already exist stay readable. Read GET /api/v3/ai-sign-design-capabilities and try again when available is true.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}
```