> ## Documentation Index
> Fetch the complete documentation index at: https://developer.rocket.chat/llms.txt
> Use this file to discover all available pages before exploring further.

# Check Room Member

> Use this endpoint to check whether or not a user is a member of a specific room. If the user is not a member of the room, an error response (`error-user-not-found`) is returned. You can only get the results for the rooms that you are a member of. Otherwise, you get a forbidden error response.

## OpenAPI

````json GET /api/v1/rooms.isMember
{
  "openapi": "3.0.0",
  "info": {
    "version": "1.0.0",
    "title": "Rooms"
  },
  "servers": [
    {
      "url": "https://apiexplorer.support.rocket.chat"
    }
  ],
  "tags": [
    {
      "name": "Channels"
    },
    {
      "name": "Directory"
    },
    {
      "name": "Groups"
    },
    {
      "name": "Rooms"
    },
    {
      "name": "Teams"
    },
    {
      "name": "Room Invites"
    },
    {
      "name": "Subscriptions"
    },
    {
      "name": "ABAC"
    }
  ],
  "paths": {
    "/api/v1/rooms.isMember": {
      "get": {
        "summary": "Check Room Member",
        "tags": [
          "Rooms"
        ],
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "isMember": {
                      "type": "boolean"
                    },
                    "success": {
                      "type": "boolean"
                    }
                  }
                },
                "examples": {
                  "Example 1": {
                    "value": {
                      "isMember": true,
                      "success": true
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Bad Request",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "success": {
                      "type": "boolean"
                    },
                    "error": {
                      "type": "string"
                    }
                  }
                },
                "examples": {
                  "User not available in room": {
                    "value": {
                      "success": false,
                      "error": "error-user-not-found"
                    }
                  },
                  "Missing user ID parameter": {
                    "value": {
                      "success": false,
                      "error": "must have required property 'userId'\n must have required property 'username'\n must match exactly one schema in oneOf [error-invalid-params]",
                      "errorType": "error-invalid-params"
                    }
                  }
                }
              }
            }
          },
          "401": {
            "$ref": "#/components/responses/authorizationError"
          }
        },
        "operationId": "get-api-v1-rooms.isMember",
        "description": "Use this endpoint to check whether or not a user is a member of a specific room. If the user is not a member of the room, an error response (`error-user-not-found`) is returned. You can only get the results for the rooms that you are a member of. Otherwise, you get a forbidden error response.",
        "parameters": [
          {
            "schema": {
              "type": "string"
            },
            "in": "query",
            "name": "roomId",
            "description": "Enter the room ID in which you want to check for the user.",
            "required": true
          },
          {
            "$ref": "#/components/parameters/Auth-Token"
          },
          {
            "$ref": "#/components/parameters/UserId"
          },
          {
            "schema": {
              "type": "string"
            },
            "in": "query",
            "name": "userId",
            "description": "Enter the user ID that you want to check. Alternatively, you can use the `username` parameter and provide the user name instead of the user ID.",
            "required": true
          }
        ]
      }
    }
  },
  "components": {
    "responses": {
      "authorizationError": {
        "description": "Unauthorized",
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "success": {
                  "type": "boolean"
                },
                "error": {
                  "type": "string"
                }
              }
            },
            "examples": {
              "Authorization Error": {
                "value": {
                  "success": false,
                  "error": "You must be logged in to do this."
                }
              }
            }
          }
        }
      }
    },
    "parameters": {
      "Auth-Token": {
        "name": "X-Auth-Token",
        "in": "header",
        "description": "The `authToken` of the authenticated user.",
        "required": true,
        "schema": {
          "type": "string"
        },
        "example": "RScctEHSmLGZGywfIhWyRpyofhKOiMoUIpimhvheU3f"
      },
      "UserId": {
        "name": "X-User-Id",
        "in": "header",
        "description": "The `userId` of the authenticated user.",
        "required": true,
        "schema": {
          "type": "string"
        },
        "example": "rbAXPnMktTFbNpwtJ"
      }
    }
  }
}
````