# List child keys

URL: https://docs.healthcare.dev/reference/keys/list-child-keys

```http
GET https://api.healthcare.dev/v1/keys
```

Your account's child keys, active ones and those revoked in the last 90 days, newest first, with this month's calls and spend for each. Never returns the secrets. Call with a parent key; works on every plan, so child keys stay visible after a downgrade.

Requires an API key: `Authorization: Bearer hdev_live_...`. See [Authentication](/authentication).

## Examples

**curl**

```sh
curl "https://api.healthcare.dev/v1/keys" \
  -H "Authorization: Bearer $HDEV_API_KEY"
```

**TypeScript**

```ts
const res = await fetch("https://api.healthcare.dev/v1/keys", {
  headers: { Authorization: `Bearer ${process.env.HDEV_API_KEY}` },
});
const { data, meta } = await res.json();
```

**Python**

```python
import os
import requests

res = requests.get("https://api.healthcare.dev/v1/keys", headers={"Authorization": f"Bearer {os.environ['HDEV_API_KEY']}"})
body = res.json()
```

## Response

Child keys

```json
{
  "data": [
    {
      "id": "string",
      "name": "string",
      "prefix": "string",
      "env": "live",
      "scopes": [
        "codes"
      ],
      "rps_limit": 1,
      "monthly_cap_cents": 1,
      "month_to_date": {
        "calls": 1,
        "spend_cents": 1
      },
      "created_at": "string",
      "last_used_at": "string",
      "revoked_at": "string"
    }
  ],
  "meta": {
    "source": "cms-icd10",
    "data_version": "2026.1",
    "retrieved_at": "2026-10-24T12:00:00Z",
    "license": "Public domain (CMS). Reference data, not medical advice."
  },
  "links": {
    "self": "/v1/keys",
    "next": "/v1/keys?cursor=eyJrIjoiRTExLjkifQ"
  }
}
```

### Fields

| Field | Type | Always present | Description |
| --- | --- | --- | --- |
| `id` | string | yes |  |
| `name` | string | yes |  |
| `prefix` | string | yes | The key's public prefix (`hdev_live_k3j9x2ab`), never the secret |
| `env` | "live" \| "test" | yes |  |
| `scopes` | KeyScope[] | yes | Route groups it may call; null for every group except `webhooks` |
| `rps_limit` | integer \| null | yes | Its own requests-a-second limit, if set |
| `monthly_cap_cents` | integer \| null | yes | Its monthly spend cap, if set |
| `month_to_date` | object | yes | Usage so far this month; it also counts toward the account's own usage |
| `created_at` | string | yes |  |
| `last_used_at` | string \| null | yes |  |
| `revoked_at` | string \| null | yes |  |

## Errors

Errors are `application/problem+json` ([RFC 9457](https://www.rfc-editor.org/rfc/rfc9457)). Branch on `type`, not on `title`. See [Errors](/errors).

| Status | `type` | When |
| --- | --- | --- |
| 401 | `unauthorized` | Missing, malformed or revoked API key. |
| 403 | `plan-upgrade-required` | The plan doesn't include this feature; `required_plan` names the plan that does. |
| 429 | `rate-limited / quota-exceeded` | Too many requests per second (retry after `Retry-After`), or the monthly quota is used up. |