> For the complete documentation index, see [llms.txt](https://vampauth.gitbook.io/vampauth-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vampauth.gitbook.io/vampauth-docs/api-reference/management/groups.md).

# Groups and default payload

| Method and path                                       | Scope         | Notes                         |
| ----------------------------------------------------- | ------------- | ----------------------------- |
| GET /projects/{project\_id}/key-groups                | groups:read   | Paginated; project ETag       |
| POST /projects/{project\_id}/key-groups               | groups:write  | 201; required Idempotency-Key |
| GET /projects/{project\_id}/key-groups/{group\_id}    | groups:read   | Group plus project ETag       |
| PATCH /projects/{project\_id}/key-groups/{group\_id}  | groups:write  | Required project If-Match     |
| DELETE /projects/{project\_id}/key-groups/{group\_id} | groups:write  | Required project If-Match     |
| PUT /projects/{project\_id}/default-payload           | loaders:write | Required project If-Match     |

Group reads accept the group-read capabilities listed in Scopes. Writes require manage\_key\_groups; default payload requires manage\_loaders. Configuration body limit: 64 KiB.

Create requires name. Optional color is six-digit hex/null; payload\_loader\_id is same-project UUID/null. Name is sanitized to 1–30 characters. PATCH accepts a nonempty subset of the same fields. Both return id, project\_id, name, color, payload\_loader\_id, created\_at.

Delete accepts empty input/{} and returns affected\_count. It preserves keys as ungrouped and detaches package mappings. PATCH/delete accept optional idempotency keys.

Default payload body: `{"payload_loader_id":"LOADER-UUID"}`, or null to clear. It returns the saved assignment and new project ETag. Optional idempotency key. Selecting a payload doesn't publish new source.


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