---
title: "UpdateSpecBody"
description: "Request body for updating a Spec."
section: "Reference"
group: "Types"
order: 207
---

## Definition

```ts
interface UpdateSpecBody {
  name?: string | undefined;
  description?: string | null | undefined;
  sourceUrl?: string | undefined;
  baseUrl?: string | null | undefined;
  authHeaderName?: string | null | undefined;
  authValuePrefix?: string | null | undefined;
  authSecretId?: string | null | undefined;
  solutionId?: string | null | undefined;
}
```

## Fields

| Field             | Type                          | Notes                                                                                                    |
| ----------------- | ----------------------------- | -------------------------------------------------------------------------------------------------------- |
| `name`            | `string \| undefined`         | `optional` — New spec name.                                                                              |
| `description`     | `string \| null \| undefined` | `optional` — Updated description; `null` clears the existing one.                                        |
| `sourceUrl`       | `string \| undefined`         | `optional` — New spec URL. Changing this does NOT trigger a refresh — call refresh explicitly afterward. |
| `baseUrl`         | `string \| null \| undefined` | `optional` — New base URL override; `null` clears the override.                                          |
| `authHeaderName`  | `string \| null \| undefined` | `optional` — New auth header name; `null` removes auth.                                                  |
| `authValuePrefix` | `string \| null \| undefined` | `optional` — New auth value prefix; `null` clears the prefix.                                            |
| `authSecretId`    | `string \| null \| undefined` | `optional` — New auth secret reference; `null` removes the secret link.                                  |
| `solutionId`      | `string \| null \| undefined` | `optional` — Move generated entities into a different solution, or unwrap them by passing `null`.        |