Call a Tool on an MCP Server

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Demonstrates Mcp.CallTool, which calls the MCP tools/call method for a named tool, passing a JSON arguments object and receiving the tool's result. The example calls the Microsoft Learn microsoft_docs_search tool.

Tip: Code to parse the returned JSON can be generated with Chilkat's online tool at https://tools.chilkat.io/jsonParse.

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var mcp = new chilkat.Mcp();

    //  Connect to a public MCP (Model Context Protocol) server over its Streamable HTTP endpoint.  The
    //  Microsoft Learn MCP server is public and requires no authentication.
    success = mcp.Connect("https://learn.microsoft.com/api/mcp");
    if (success == false) {
        console.log(mcp.LastErrorText);
        return;
    }

    //  Build the tool's input arguments.  The members required depend on the tool's input schema (see
    //  ListTools).  Here the Microsoft Learn "microsoft_docs_search" tool takes a search query.
    var args = new chilkat.JsonObject();
    args.UpdateString("query","How do I create an Azure storage account?");

    //  Call the MCP tools/call method for the named tool.  The tool's result is placed in the result
    //  JsonObject.
    var result = new chilkat.JsonObject();
    success = mcp.CallTool("microsoft_docs_search",args,result);
    if (success == false) {
        console.log(mcp.LastErrorText);
        return;
    }

    result.EmitCompact = false;
    console.log(result.Emit());
    //  JSON parsing code for this result can be generated at Chilkat's online tool:
    //  https://tools.chilkat.io/jsonParse

}

chilkatExample();