Module-based API for application-owned MCP servers.

Use this module when the server is part of your application and should behave like the rest of your OTP infrastructure. It keeps the existing builder API, but adds:

• module-owned server identity
• generated child_spec/1 and start_link/1
• config resolution from :otp_app
• transport defaults for streamable HTTP and well-known HTTP endpoints

A server module still returns a normal %FastestMCP.Server{}. The difference is that the module now owns startup, supervision, and config merging.

Example

defmodule MyApp.MCPServer do
  use FastestMCP.ServerModule,
    otp_app: :my_app,
    http: [port: 4100, allowed_hosts: :localhost]

  def server(opts) do
    base_server(opts)
    |> FastestMCP.add_tool("ping", fn _args, _ctx -> %{ok: true} end)
  end
end

After that, MyApp.MCPServer can sit directly in your supervision tree:

children = [
  MyApp.MCPServer
]

Required Callback

A server module must implement server/1 and return a %FastestMCP.Server{} whose name matches the module name. base_server/1 exists to make that the default instead of something you have to remember.