3da831b0c9* mcp: move to 2025-06-18 schema Add types and fields for the latest MCP schema. The main challenge here was dealing with the presence of _meta fields on many types, like Tool, Prompt and Resource. - Distinguish between the _meta field of a request's params, which includes a progress token, from the _meta field on other types, which is simply a map. - Redefine GetMeta to return a pointer to the map. We wanted to avoid that, but I don't see a clean way to do so. An alternative would be to have GetMeta return a map, and SetMeta to set it. - Provide GetProgressToken for requests only (not notifications or other types). - Still to do: deal with the meta and annotation fields of ContentBlock, which are currently duplicated for Resource and ResourceContents. * Meta and progress token redesign
74 lines
1.9 KiB
Go
74 lines
1.9 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 mcp_test
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import (
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"context"
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"fmt"
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"log"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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type SayHiParams struct {
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Name string `json:"name"`
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}
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func SayHi(ctx context.Context, cc *mcp.ServerSession, params *mcp.CallToolParamsFor[SayHiParams]) (*mcp.CallToolResultFor[any], error) {
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return &mcp.CallToolResultFor[any]{
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Content: []*mcp.ContentBlock{
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mcp.NewTextContent("Hi " + params.Arguments.Name),
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},
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}, nil
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}
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func ExampleServer() {
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ctx := context.Background()
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clientTransport, serverTransport := mcp.NewInMemoryTransports()
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server := mcp.NewServer("greeter", "v0.0.1", nil)
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server.AddTools(mcp.NewServerTool("greet", "say hi", SayHi))
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serverSession, err := server.Connect(ctx, serverTransport)
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if err != nil {
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log.Fatal(err)
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}
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client := mcp.NewClient("client", "v0.0.1", nil)
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clientSession, err := client.Connect(ctx, clientTransport)
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if err != nil {
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log.Fatal(err)
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}
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res, err := clientSession.CallTool(ctx, &mcp.CallToolParams{
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Name: "greet",
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Arguments: map[string]any{"name": "user"},
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})
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(res.Content[0].Text)
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clientSession.Close()
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serverSession.Wait()
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// Output: Hi user
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}
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// createSessions creates and connects an in-memory client and server session for testing purposes.
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func createSessions(ctx context.Context) (*mcp.ClientSession, *mcp.ServerSession, *mcp.Server) {
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server := mcp.NewServer("server", "v0.0.1", nil)
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client := mcp.NewClient("client", "v0.0.1", nil)
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serverTransport, clientTransport := mcp.NewInMemoryTransports()
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serverSession, err := server.Connect(ctx, serverTransport)
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if err != nil {
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log.Fatal(err)
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}
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clientSession, err := client.Connect(ctx, clientTransport)
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if err != nil {
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log.Fatal(err)
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}
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return clientSession, serverSession, server
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}
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