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feat: use in-memory MCP server to skip HTTP auth issues #121

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Merged
sweetmantech merged 1 commit into from
Jan 16, 2026
Merged

feat: use in-memory MCP server to skip HTTP auth issues #121

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22 changes: 14 additions & 8 deletions lib/chat/setupToolsForRequest.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,16 +2,15 @@ import { ToolSet } from "ai";
import { filterExcludedTools } from "./filterExcludedTools";
import { ChatRequestBody } from "./validateChatRequest";
import { experimental_createMCPClient as createMCPClient } from "@ai-sdk/mcp";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { InMemoryTransport } from "@modelcontextprotocol/sdk/inMemory.js";
import { registerAllTools } from "@/lib/mcp/tools";
import { getGoogleSheetsTools } from "@/lib/agents/googleSheetsAgent";

/** Base URL for the MCP server */
const MCP_BASE_URL = process.env.MCP_BASE_URL || "https://recoup-api.vercel.app";

/**
* Sets up and filters tools for a chat request.
* Aggregates tools from:
* - MCP client (remote tools via MCP protocol)
* - MCP server (in-process via in-memory transport, no HTTP overhead)
* - Google Sheets (via Composio integration)
*
* @param body - The chat request body
Expand All @@ -20,10 +19,17 @@ const MCP_BASE_URL = process.env.MCP_BASE_URL || "https://recoup-api.vercel.app"
export async function setupToolsForRequest(body: ChatRequestBody): Promise<ToolSet> {
const { excludeTools } = body;

// Fetch MCP tools
const mcpClient = await createMCPClient({
transport: new StreamableHTTPClientTransport(new URL("/mcp", MCP_BASE_URL)),
// Create in-memory MCP server and client (no HTTP call needed)
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();

const server = new McpServer({
name: "recoup-mcp",
version: "0.0.1",
});
registerAllTools(server);
await server.connect(serverTransport);

const mcpClient = await createMCPClient({ transport: clientTransport });
const mcpClientTools = (await mcpClient.tools()) as ToolSet;

// Fetch Google Sheets tools (authenticated tools or login tool)
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