> ## Documentation Index
> Fetch the complete documentation index at: https://replyke-feat-push-rich-payload-fields.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Fetch Mutual Spaces

> Get spaces shared between the authenticated user and another user

Returns a paginated list of spaces that both the authenticated user and another user are active members of — i.e. their spaces in common. Requires an authenticated user.

## Path Parameters

<ParamField path="userId" type="string" required>
  The other user's Sublay ID. Mutual spaces are computed between this user and the authenticated user.
</ParamField>

## Query Parameters

<ParamField query="actingUserId" type="string">
  The authenticated user to act as. Only accepted with a **service or master key** — a user token always acts as itself and may not name a different user. Ignored (the token's user is used) for end-user requests.
</ParamField>

<ParamField query="page" type="number">
  Page number. Defaults to `1`.
</ParamField>

<ParamField query="limit" type="number">
  Results per page. Max `100`. Defaults to `20`.
</ParamField>

<ParamField query="include" type="string">
  Optional comma-separated includes. Pass `"files"` to include avatar and banner file objects on each space.
</ParamField>

## Response

<ResponseField name="data" type="Space[]">
  The spaces both users are active members of. Computed fields such as `membersCount` and `isMember` are populated from the authenticated user's perspective.
</ResponseField>

<ResponseField name="pagination" type="object">
  Standard pagination metadata (`page`, `pageSize`, `totalPages`, `totalItems`, `hasMore`).
</ResponseField>

See also: [useFetchMutualSpaces](/hooks/spaces/use-fetch-mutual-spaces)