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The property 'setRequestHandler' does not exist on type 'McpServer'. ts(2339) #642

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import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { z } from "zod";

// Create an MCP server
const server = new McpServer({
name: "demo-server",
version: "1.0.0"
}, {
capabilities: {
resources: {}
}
});

// Add an addition tool
server.tool('Addition Tool', 'Add two numbers', {
a: z.number().default(1),
b: z.number().default(2)
}, async ({ a, b }) => {
return {
content: [{ type: "text", text: String(a + b) }]
}
})

// server.setRequestHandler

"@modelcontextprotocol/sdk": "^1.12.3",

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betweens

betweens commented on Jun 17, 2025

@betweens
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The property 'setRequestHandler' does not exist on type 'McpServer'. ts(2339)

changed the title [-]类型“McpServer”上不存在属性“setRequestHandler”。ts(2339)[/-] [+]The property 'setRequestHandler' does not exist on type 'McpServer'. ts(2339)[/+] on Jun 17, 2025
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          The property 'setRequestHandler' does not exist on type 'McpServer'. ts(2339) · Issue #642 · modelcontextprotocol/typescript-sdk