# List models

`listModels`

`GET /v1/models`

List accessible model specifications

## Authentication

Send your project key in the request header, for example `Authorization: Bearer $VIZO_API_KEY`. Keep the key on your server.

## Query parameters

- `limit` (integer, Optional) Page size. Minimum 1 Maximum 100 Default 50
- `cursor` (string, Optional) The last model id of the previous page. At most 64 characters

## Responses

### 200 OK

- `entries` (object[], Required, can be null)
  - `asOf` (date-time, Required)
  - `features` (string[], Required, can be null)
  - `inputSchema` (any, Required)
  - `mediaType` (string, Required)
  - `modelId` (string, Required)
  - `tiers` (object[], Required, can be null)
    - `id` (string, Required)
    - `match` (map<string, any>, Required)
    - `pricing` (object, Required)
      - `comparison` (object, Optional)
        - `official` (object, Required)
        - `officialRequestAmount` (string, Optional)
        - `ourAmount` (string, Optional)
        - `referencePack` (object, Optional)
        - `savingsPercent` (string, Optional)
      - `credits` (string, Required)
      - `image` (object, Optional)
        - `extra_input_credits` (string, Optional)
        - `free_input_images` (integer, Required)
        - `large_credits` (string, Optional)
        - `max_outputs` (integer, Required)
        - `output_credits` (string, Required)
      - `kind` (string, Required)
      - `rate` (object, Optional)
        - `auto_duration` (boolean, Required)
        - `counts_input` (boolean, Required)
        - `credits_per_second` (string, Required)
        - `max_input_seconds` (integer, Required)
        - `max_seconds` (integer, Required)
        - `min_seconds` (integer, Required)
      - `usd` (object, Required)
        - `amount` (string, Optional) Pattern ^(0\|[1-9][0-9]*)([.][0-9]+)?$
        - `as_of` (date-time, Optional)
        - `basis` (string, Optional) Allowed values: `current_standard_pack`
        - `status` (string, Required) Available when a current USD reference pack supplies the estimate; unavailable when no valid reference exists. This is a display estimate, not the charge. Allowed values: `available`, `unavailable`
        - `tax_included` (boolean, Required) Allowed values: `false`
- `next_cursor` (string, Optional) Pass as cursor to read the next page. Empty on the last page.

```json
{
  "entries": [
    {
      "asOf": "2026-11-02T08:00:00Z",
      "features": [
        "string"
      ],
      "inputSchema": {},
      "mediaType": "string",
      "modelId": "string",
      "tiers": [
        {
          "id": null,
          "match": null,
          "pricing": null
        }
      ]
    }
  ],
  "next_cursor": ""
}
```

### 401 Unauthorized

```json
{
  "error": {
    "code": "invalid_credentials",
    "message": "API key is missing, malformed, expired or revoked.",
    "retryable": false,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

### 403 Forbidden

```json
{
  "error": {
    "code": "scope_denied",
    "message": "The key does not allow this operation for this project.",
    "retryable": false,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

### 404 Not Found

```json
{
  "error": {
    "code": "resource_not_found",
    "message": "The resource is not available to this project.",
    "retryable": false,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

### 422 Unprocessable Entity

```json
{
  "error": {
    "code": "invalid_input",
    "message": "Input does not match the published schema.",
    "retryable": false,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

### 500 Internal Server Error

```json
{
  "error": {
    "code": "request_failed",
    "message": "The request failed. Check recent generations before submitting again.",
    "retryable": false,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

### 503 Service Unavailable

```json
{
  "error": {
    "code": "temporarily_unavailable",
    "message": "Service is temporarily unavailable.",
    "retryable": true,
    "request_id": "9f2c41d07ab3e5c8"
  }
}
```

## Errors

Errors share one body. Include the request_id when you contact support.

### Error body

- `error` (object, Required) Details of the error.
  - `code` (string, Required) Stable request error code. invalid_input rejects the request schema; invalid_credentials/scope_denied reject authentication/authorization; ip_not_allowed/model_not_allowed reject API key IP/model restrictions; resource_not_found hides missing or inaccessible resources; conflict rejects incompatible state; insufficient_balance/budget_exceeded/spending_blocked reject funding; balance_negative (402) refuses new tasks while the organization owes Credits from a charge above its hold, until a top-up repays them; rate_limited/concurrency_limited ask for a later retry; temporarily_unavailable is transient service capacity; request_failed covers other HTTP failures. tier_not_sold, draft_not_found, draft_expired and input_duration_out_of_range reject model-specific input. input_media_invalid rejects a detected format/type mismatch; input_media_too_large rejects a probed byte size above the model limit. storage_quota_exceeded rejects an upload when the organization's storage is full. See errors for field-level details. Allowed values: `invalid_input`, `invalid_credentials`, `insufficient_balance`, `balance_negative`, `scope_denied`, `resource_not_found`, `conflict`, `rate_limited`, `concurrency_limited`, `temporarily_unavailable`, `request_failed`, `ip_not_allowed`, `model_not_allowed`, `tier_not_sold`, `draft_not_found`, `draft_expired`, `input_duration_out_of_range`, `input_media_invalid`, `input_media_too_large`, `budget_exceeded`, `spending_blocked`, `storage_quota_exceeded`
  - `errors` (object[], Optional, can be null)
    - `path` (string, Required)
    - `rule` (string, Required)
  - `message` (string, Required) Readable explanation. Do not parse it.
  - `request_id` (string, Required) Include this when you contact support.
  - `retryable` (boolean, Required) True for 429 and 503 only. Even then, check recent tasks before you send a create request again.
  - `task_id` (string, Optional) The task this error belongs to, when one exists.

| Status | What it means and what to do |
| --- | --- |
| 401 | The key is missing, malformed, expired or revoked. Correct the key on your server, then continue. |
| 403 | The key scope, email verification, a budget or an account restriction blocks this. Check the key type, scopes and project budget. |
| 404 | The model or resource does not exist or is outside this project. Check the project, the ID and that the model is enabled. |
| 422 | A field or value is invalid. Compare the request with the field table and the model page. |
| 500 | The server failed and the task may already be accepted. Do not resend; list recent tasks first. |
| 503 | The service is temporarily unavailable. For a create request, list recent tasks and confirm none was accepted before you submit again. |

### cURL

```bash
curl "https://api.vizoapi.com/v1/models?limit=20" \
  -H "Authorization: Bearer $VIZO_API_KEY"
```

### Python

```python
import os, requests

res = requests.get(
    "https://api.vizoapi.com/v1/models?limit=20",
    headers={"Authorization": f"Bearer {os.environ['VIZO_API_KEY']}"},
    timeout=60,
)
print(res.status_code, res.json())
```

### Node.js

```javascript
const res = await fetch("https://api.vizoapi.com/v1/models?limit=20", {
  method: "GET",
  headers: {
    Authorization: `Bearer ${process.env.VIZO_API_KEY}`,
  },
});
console.log(res.status, await res.json());
```