02fa1b3ea6
Use pointers for the protocol's struct types, to future-proof against them getting large. Change-Id: I55b204080a41c8140539697ba264e502e912e613 Reviewed-on: https://go-review.googlesource.com/c/tools/+/672575 Reviewed-by: Robert Findley <rfindley@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"net/http"
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"os"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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var httpAddr = flag.String("http", "", "if set, use SSE HTTP at this address, instead of stdin/stdout")
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type HiParams struct {
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Name string `json:"name"`
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}
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func SayHi(ctx context.Context, cc *mcp.ServerConnection, params *HiParams) ([]*mcp.Content, error) {
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return []*mcp.Content{
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mcp.NewTextContent("Hi " + params.Name),
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}, nil
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}
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func PromptHi(ctx context.Context, cc *mcp.ServerConnection, params *HiParams) (*mcp.GetPromptResult, error) {
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return &mcp.GetPromptResult{
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Description: "Code review prompt",
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Messages: []*mcp.PromptMessage{
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{Role: "user", Content: mcp.NewTextContent("Say hi to " + params.Name)},
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},
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}, nil
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}
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func main() {
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flag.Parse()
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server := mcp.NewServer("greeter", "v0.0.1", nil)
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server.AddTools(mcp.NewTool("greet", "say hi", SayHi, mcp.Input(
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mcp.Property("name", mcp.Description("the name to say hi to")),
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)))
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server.AddPrompts(mcp.NewPrompt("greet", "", PromptHi))
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if *httpAddr != "" {
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handler := mcp.NewSSEHandler(func(*http.Request) *mcp.Server {
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return server
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})
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http.ListenAndServe(*httpAddr, handler)
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} else {
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opts := &mcp.ConnectionOptions{Logger: os.Stderr}
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if err := server.Run(context.Background(), mcp.NewStdIOTransport(), opts); err != nil {
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fmt.Fprintf(os.Stderr, "Server failed: %v", err)
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}
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}
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}
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