Lianja Requires Chilkat v11.6.0+

Call a Tool on an MCP Server

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.

Background. The members of the arguments object are defined by the tool's input schema, which is reported by ListTools. This example uses the public, no-authentication Microsoft Learn MCP server.

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llSuccess = .F.

loMcp = createobject("CkMcp")

//  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.
llSuccess = loMcp.Connect("https://learn.microsoft.com/api/mcp")
if (llSuccess = .F.) then
    ? loMcp.LastErrorText
    release loMcp
    return
endif

//  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.
loArgs = createobject("CkJsonObject")
loArgs.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.
loResult = createobject("CkJsonObject")
llSuccess = loMcp.CallTool("microsoft_docs_search",loArgs,loResult)
if (llSuccess = .F.) then
    ? loMcp.LastErrorText
    release loMcp
    release loArgs
    release loResult
    return
endif

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


release loMcp
release loArgs
release loResult