# List word fits

`GET https://api.unique.domains/v1/words/{word}/fit`

How well the word fits each ending whose keywords list it.

The stored pair fit of the word on each ending (`basis: rated`), else 50 (`basis: default`), in the keyword's rank on the ending. `tld` asks one ending.

- Access: A member key (Founder or Investor) or a paid RapidAPI subscription to this API.
- Billing: One call.
- Plan: Investor plan. A Founder key answers 403 `plan_required`.
- Formats: JSON
- API: Word Intelligence API

## Request

| Field | Type | Needs | Where | Description |
| --- | --- | --- | --- | --- |
| `word` | string | Required | Path | The catalog slug, the word, or `wrd_<id>`. |
| `tld` | string | Optional | Query | One bare ending. |
| `limit` | integer | Optional | Query | Rows, 1 to 50. |
| `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/words/harbor/fit?tld=travel" \
  -H "Authorization: Bearer YOUR_MEMBER_KEY"
```

## Response

| Field | Type | Description |
| --- | --- | --- |
| `ending` | string |  |
| `fit` | integer |  |
| `basis` | string |  |

## Errors

| Code | Status | What it means |
| --- | --- | --- |
| [`validation_failed`](https://unique.domains/api/problems/validation_failed) | 400 | A value is not valid |
| [`not_found`](https://unique.domains/api/problems/not_found) | 404 | Not found |
| [`rate_limited`](https://unique.domains/api/problems/rate_limited) | 429 | Too many requests |
| [`internal`](https://unique.domains/api/problems/internal) | 500 | Unexpected error |

## Example answer

200, application/json

```json
{
  "data": [
    {
      "ending": "travel",
      "fit": 82,
      "basis": "rated"
    }
  ],
  "meta": {
    "asOf": "2026-11-05T08:00:00Z",
    "cursor": null,
    "limit": null
  },
  "links": {
    "self": "https://api.unique.domains/v1/words/harbor/fit?tld=travel",
    "next": null,
    "register": null,
    "product": null,
    "dataset": null
  }
}
```

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

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