feat: add mcp server (#303)

* feat: added the mcp server

* feat: added the mcp server

* fix: api for database not linked to any projects

* fix: added variable to disable MCP

* chore: refactoring

app/api/v1/mcp/route.ts

@@ -0,0 +1,31 @@
+import { WebStandardStreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/webStandardStreamableHttp.js";
+import { NextResponse } from "next/server";
+import { withApiKey } from "@/lib/api-v1/middleware";
+import { createPortabaseMcpServer } from "@/lib/mcp/server";
+import type { ApiKeyContext } from "@/lib/api-v1/types";
+import { env } from "@/env.mjs";
+
+/**
+ * MCP endpoint — Streamable HTTP transport, stateless mode.
+ *
+ * Auth is handled by withApiKey before MCP is ever touched.
+ * The validated key is forwarded by MCP tools to downstream /api/v1 REST calls.
+ */
+const apiEnabled = String(env.API_ENABLED) === "true";
+const mcpEnabled = String(env.MCP_ENABLED) === "true";
+
+export const POST = apiEnabled && mcpEnabled
+  ? withApiKey(async (req: Request, ctx: ApiKeyContext) => {
+      const apiKey = req.headers.get("x-api-key")!;
+
+      const server = createPortabaseMcpServer(ctx, apiKey);
+
+      const transport = new WebStandardStreamableHTTPServerTransport({
+        sessionIdGenerator: undefined,
+      });
+
+      await server.connect(transport);
+
+      return transport.handleRequest(req);
+    })
+  : () => NextResponse.json({ error: "Not found" }, { status: 404 });