> ## 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.

# Join a Channel

> Join a public channel.

### Changelog
| Version | Description               |
| ------- | ------------------------- |
| 0.49.0  | Added                  |

## OpenAPI

````json POST /api/v1/channels.join
{
  "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/channels.join": {
      "post": {
        "tags": [
          "Channels"
        ],
        "summary": "Join a Channel",
        "description": "Join a public channel.\n\n### Changelog\n| Version | Description               |\n| ------- | ------------------------- |\n| 0.49.0  | Added                  |",
        "operationId": "post-api-v1-channels.join",
        "parameters": [
          {
            "$ref": "#/components/parameters/Auth-Token"
          },
          {
            "$ref": "#/components/parameters/UserId"
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "roomId": {
                    "type": "string",
                    "description": "The channel ID."
                  },
                  "joinCode": {
                    "type": "string",
                    "description": "The join code of the room. Channels can be password-protected. In that case, users must enter the password for access. See <a href='https://docs.rocket.chat/docs/channels#channel-information' target='_blank'>Channel information</a> for details.\nThe join code isn't needed if the user has the `join-without-join-code` permission."
                  }
                },
                "required": [
                  "roomId"
                ]
              },
              "examples": {
                "Example": {
                  "value": {
                    "roomId": "ByehQjC44FwMeiLbX",
                    "joinCode": "1234"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "channel": {
                      "type": "object",
                      "properties": {
                        "_id": {
                          "type": "string"
                        },
                        "fname": {
                          "type": "string"
                        },
                        "customFields": {
                          "type": "object"
                        },
                        "topic": {
                          "type": "string"
                        },
                        "broadcast": {
                          "type": "boolean"
                        },
                        "encrypted": {
                          "type": "boolean"
                        },
                        "name": {
                          "type": "string"
                        },
                        "t": {
                          "type": "string"
                        },
                        "msgs": {
                          "type": "integer"
                        },
                        "usersCount": {
                          "type": "integer"
                        },
                        "u": {
                          "type": "object",
                          "properties": {
                            "_id": {
                              "type": "string"
                            },
                            "username": {
                              "type": "string"
                            }
                          }
                        },
                        "ts": {
                          "type": "string"
                        },
                        "ro": {
                          "type": "boolean"
                        },
                        "default": {
                          "type": "boolean"
                        },
                        "sysMes": {
                          "type": "boolean"
                        },
                        "_updatedAt": {
                          "type": "string"
                        },
                        "lastMessage": {
                          "type": "object",
                          "properties": {
                            "_id": {
                              "type": "string"
                            },
                            "rid": {
                              "type": "string"
                            },
                            "msg": {
                              "type": "string"
                            },
                            "ts": {
                              "type": "string"
                            },
                            "u": {
                              "type": "object",
                              "properties": {
                                "_id": {
                                  "type": "string"
                                },
                                "username": {
                                  "type": "string"
                                },
                                "name": {
                                  "type": "string"
                                }
                              }
                            },
                            "_updatedAt": {
                              "type": "string"
                            },
                            "urls": {
                              "type": "array",
                              "items": {
                                "type": "object"
                              }
                            },
                            "mentions": {
                              "type": "array",
                              "items": {
                                "type": "object"
                              }
                            },
                            "channels": {
                              "type": "array",
                              "items": {
                                "type": "object"
                              }
                            },
                            "md": {
                              "type": "array",
                              "items": {
                                "type": "object",
                                "properties": {
                                  "type": {
                                    "type": "string"
                                  },
                                  "value": {
                                    "type": "array",
                                    "items": {
                                      "type": "object",
                                      "properties": {
                                        "type": {
                                          "type": "string"
                                        },
                                        "value": {
                                          "type": "string"
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        },
                        "lm": {
                          "type": "string"
                        }
                      }
                    },
                    "success": {
                      "type": "boolean"
                    }
                  }
                },
                "examples": {
                  "Example": {
                    "value": {
                      "channel": {
                        "_id": "nxXKHF2o2nzKYtFMM",
                        "name": "test",
                        "fname": "test",
                        "t": "c",
                        "msgs": 8,
                        "usersCount": 2,
                        "u": {
                          "_id": "rocketchat.internal.admin.test",
                          "username": "rocketchat.internal.admin.test"
                        },
                        "customFields": {},
                        "broadcast": false,
                        "encrypted": false,
                        "ts": "2019-01-16T12:00:04.783Z",
                        "ro": false,
                        "sysMes": true,
                        "default": false,
                        "_updatedAt": "2019-01-16T12:06:30.426Z",
                        "joinCodeRequired": true
                      },
                      "success": true
                    }
                  }
                }
              }
            }
          },
          "401": {
            "$ref": "#/components/responses/authorizationError"
          }
        }
      }
    }
  },
  "components": {
    "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"
      }
    },
    "responses": {
      "authorizationError": {
        "description": "Unauthorized",
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "status": {
                  "type": "string"
                },
                "message": {
                  "type": "string"
                }
              }
            },
            "examples": {
              "Authorization Error": {
                "value": {
                  "status": "error",
                  "message": "You must be logged in to do this."
                }
              }
            }
          }
        }
      }
    }
  }
}
````