go-sdk/mcp/server_example_test.go
Jonathan Amsterdam 6c6243c0b0
mcp: NewClient and NewServer take Implementation (#113)
Change the name and version arguments to NewClient and NewServer to a
`*Implementation`, to future-proof against the spec.

Fixes #109.
2025-07-10 16:57:38 -04:00

74 lines
2 KiB
Go

// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package mcp_test
import (
"context"
"fmt"
"log"
"github.com/modelcontextprotocol/go-sdk/mcp"
)
type SayHiParams struct {
Name string `json:"name"`
}
func SayHi(ctx context.Context, cc *mcp.ServerSession, params *mcp.CallToolParamsFor[SayHiParams]) (*mcp.CallToolResultFor[any], error) {
return &mcp.CallToolResultFor[any]{
Content: []mcp.Content{
&mcp.TextContent{Text: "Hi " + params.Arguments.Name},
},
}, nil
}
func ExampleServer() {
ctx := context.Background()
clientTransport, serverTransport := mcp.NewInMemoryTransports()
server := mcp.NewServer(&mcp.Implementation{Name: "greeter", Version: "v0.0.1"}, nil)
mcp.AddTool(server, &mcp.Tool{Name: "greet", Description: "say hi"}, SayHi)
serverSession, err := server.Connect(ctx, serverTransport)
if err != nil {
log.Fatal(err)
}
client := mcp.NewClient(&mcp.Implementation{Name: "client"}, nil)
clientSession, err := client.Connect(ctx, clientTransport)
if err != nil {
log.Fatal(err)
}
res, err := clientSession.CallTool(ctx, &mcp.CallToolParams{
Name: "greet",
Arguments: map[string]any{"name": "user"},
})
if err != nil {
log.Fatal(err)
}
fmt.Println(res.Content[0].(*mcp.TextContent).Text)
clientSession.Close()
serverSession.Wait()
// Output: Hi user
}
// createSessions creates and connects an in-memory client and server session for testing purposes.
func createSessions(ctx context.Context) (*mcp.ClientSession, *mcp.ServerSession, *mcp.Server) {
server := mcp.NewServer(testImpl, nil)
client := mcp.NewClient(testImpl, nil)
serverTransport, clientTransport := mcp.NewInMemoryTransports()
serverSession, err := server.Connect(ctx, serverTransport)
if err != nil {
log.Fatal(err)
}
clientSession, err := client.Connect(ctx, clientTransport)
if err != nil {
log.Fatal(err)
}
return clientSession, serverSession, server
}