Vancouver 让你轻松地将模型上下文协议（MCP）功能添加到你的 Phoenix/Bandit 服务器。Vancouver 负责初始化、请求验证，并提供辅助功能，简化 MCP 工具和提示的创建。

开始

1.添加依赖

在mix.exs中：

2.创建你的工具/提示

你可以实施以下工具：

还有像这样的提示：

3.添加配置

在config.ex中：

4.添加你的MCP路线

在router.ex中：

5.（可选）添加到你的MCP客户端

例如，对于 Claude Desktop，你可以修改配置 Settings -> Developer -> Edit config：

{ “mcpServers”： { “MyApp”：{ “命令”：“NPX”， “ARGS”： [ “MCP-遥控器”， “http://localhost:4000/mcp" ] } } }

运行你的服务器，重启Claude，让它开始使用你的MCP工具。🚀

常见问题解答

温哥华是否支持模型上下文协议规范的所有部分？

还没有。温哥华目前支持：

• 工具
• 提示
• 同步响应（无流媒体）

不过，这个库足够简单，你应该可以根据需要进行修改。

有关协议本身的更多信息，请参见MCP用户指南。

温哥华稳定吗/准备开拍？

不。

Vancouver

Vancouver makes it easy to add Model Context Protocol (MCP) functionality to your Phoenix/Bandit server. Vancouver handles initialization, request validation, and offers helper functions to simplify the creation of MCP tools and prompts.

Getting started

1. Add dependency

In mix.exs:

defp deps do
  [
    {:vancouver, "~> 0.3"}
  ]
end

2. Create your tools/prompts

You can implement tools like this:

defmodule MyApp.Tools.CalculateSum do
  use Vancouver.Tool

  def name, do: "calculate_sum"
  def description, do: "Add two numbers together"

  def input_schema do
    %{
      "type" => "object",
      "properties" => %{
        "a" => %{"type" => "number"},
        "b" => %{"type" => "number"}
      },
      "required" => ["a", "b"]
    }
  end

  def run(conn, %{"a" => a, "b" => b}) do
    send_text(conn, "#{a + b}")
  end
end

And prompts like this:

defmodule MyApp.Prompts.CodeReview do
  use Vancouver.Prompt

  def name, do: "code_review"
  def description, do: "Asks the LLM to analyze code quality and suggest improvements"

  def arguments do
    [
      %{
        "name" => "code",
        "description" => "The code to review",
        "required" => true
      }
    ]
  end

  def run(conn, %{"code" => code}) do
    send_text(conn, "Please review this code: #{code}")
  end
end

3. Add config

In config.ex:

config :vancouver,
  name: "My MCP Server",
  version: "1.0.0"

4. Add your MCP route

In router.ex:

forward "/mcp", Vancouver.Router, 
  tools: [MyApp.Tools.CalculateSum],
  prompts: [MyApp.Prompts.CodeReview]

5. (Optional) Add to your MCP client

E.g. For Claude Desktop, you can modify your config Settings -> Developer -> Edit config as follows:

{
    "mcpServers": {
        "MyApp": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "http://localhost:4000/mcp"
            ]
        }
    }
}

Run your server, and restart Claude to starting using your MCP tools. 🚀

FAQ

Does Vancouver support all parts of the Model Context Protocol specification?

Not yet. Vancouver currently supports:

• tools
• prompts
• sync responses (no streaming)

However, the library is simple enough that you should be able to modify it for your needs.