# List cheapest prices

`GET https://api.unique.domains/v1/prices/cheapest`

The cheapest registrar per ending for up to 100 endings.

Lowest first year, renewal and transfer-in among the nine, in the order asked; an unpriced ending answers its row with nulls.

- Access: A member key (Founder or Investor) or a paid RapidAPI subscription to this API.
- Billing: One call.
- Formats: JSON
- API: Registrar Prices API

## Request

| Field | Type | Needs | Where | Description |
| --- | --- | --- | --- | --- |
| `tlds` | string | Required | Query | Comma-separated bare endings, 1 to 100, duplicates folded. |
| `fields` | string | Optional | Query | Comma-separated top-level keys to keep; an unknown key answers 400 `unsupported_field`. |

## Sample request

```bash
curl -X GET "https://api.unique.domains/v1/prices/cheapest?tlds=ai%2Cio" \
  -H "Authorization: Bearer YOUR_MEMBER_KEY"
```

## Response

| Field | Type | Description |
| --- | --- | --- |
| `ending` | string |  |
| `cheapestYear1` | object |  |
| `cheapestRenewal` | object |  |
| `cheapestTransfer` | object |  |
| `trap` | boolean |  |

## Errors

| Code | Status | What it means |
| --- | --- | --- |
| [`keyed_only`](https://unique.domains/api/problems/keyed_only) | 403 | A paid subscription is required |
| [`rate_limited`](https://unique.domains/api/problems/rate_limited) | 429 | Too many requests |
| [`internal`](https://unique.domains/api/problems/internal) | 500 | Unexpected error |
| [`not_ready`](https://unique.domains/api/problems/not_ready) | 503 | Not ready yet |

## Example answer

200, application/json

```json
{
  "data": [
    {
      "ending": "ai",
      "cheapestYear1": {
        "registrar": "porkbun",
        "price": 71.4
      },
      "cheapestRenewal": {
        "registrar": "porkbun",
        "price": 71.4
      },
      "cheapestTransfer": {
        "registrar": "cloudflare",
        "price": 80
      },
      "trap": false
    }
  ],
  "meta": {
    "asOf": "2026-11-05T08:00:00Z",
    "cursor": null,
    "limit": null
  },
  "links": {
    "self": "https://api.unique.domains/v1/prices/cheapest?tlds=ai%2Cio",
    "next": null,
    "register": null,
    "product": null,
    "dataset": null
  }
}
```

API status: https://uniquedomains.instatus.com

Full reference: https://unique.domains/api