6e03217c83Handlers and client/server methods take a single request argument combining the session and params. This slightly simplifies the signature for handlers, since there is no longer an often-ignored session argument. But more importantly, it opens the door to adding more information in requests, such as auth info and HTTP request headers. For #243.
49 lines
1.6 KiB
Go
49 lines
1.6 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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"fmt"
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"log"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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// This example demonstrates the minimal code to declare and assign
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// a CompletionHandler to an MCP Server's options.
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func main() {
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// Define your custom CompletionHandler logic.
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myCompletionHandler := func(_ context.Context, req *mcp.ServerRequest[*mcp.CompleteParams]) (*mcp.CompleteResult, error) {
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// In a real application, you'd implement actual completion logic here.
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// For this example, we return a fixed set of suggestions.
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var suggestions []string
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switch req.Params.Ref.Type {
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case "ref/prompt":
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suggestions = []string{"suggestion1", "suggestion2", "suggestion3"}
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case "ref/resource":
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suggestions = []string{"suggestion4", "suggestion5", "suggestion6"}
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default:
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return nil, fmt.Errorf("unrecognized content type %s", req.Params.Ref.Type)
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}
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return &mcp.CompleteResult{
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Completion: mcp.CompletionResultDetails{
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HasMore: false,
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Total: len(suggestions),
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Values: suggestions,
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},
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}, nil
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}
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// Create the MCP Server instance and assign the handler.
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// No server running, just showing the configuration.
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_ = mcp.NewServer(&mcp.Implementation{Name: "server"}, &mcp.ServerOptions{
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CompletionHandler: myCompletionHandler,
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})
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log.Println("MCP Server instance created with a CompletionHandler assigned (but not running).")
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log.Println("This example demonstrates configuration, not live interaction.")
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}
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