fix: return 405 for unsupported SSE stream probe

.cursor-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "parseable",
   "displayName": "Parseable",
-  "version": "0.2.14",
+  "version": "0.2.15",
   "description": "Query and manage Parseable logs, metrics, datasets, and alerts from Cursor.",
   "author": {
     "name": "Parseable"
@@ -20,10 +20,6 @@
     "mcp"
   ],
   "category": "developer-tools",
-  "tags": [
-    "observability",
-    "monitoring",
-    "mcp"
-  ],
+  "tags": ["observability", "monitoring", "mcp"],
   "mcpServers": "./mcp.json"
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@parseable/parseable-mcp-server",
-  "version": "0.2.14",
+  "version": "0.2.15",
   "mcpName": "io.github.parseablehq/parseable-mcp-server",
   "description": "Model Context Protocol server for Parseable. Lets LLMs discover and query Parseable datasets.",
   "repository": {

server.json

@@ -6,12 +6,12 @@
     "url": "https://github.com/parseablehq/parseable-mcp-server",
     "source": "github"
   },
-  "version": "0.2.14",
+  "version": "0.2.15",
   "packages": [
     {
       "registryType": "npm",
       "identifier": "@parseable/parseable-mcp-server",
-      "version": "0.2.14",
+      "version": "0.2.15",
       "transport": {
         "type": "stdio"
       }

src/bootstrap.ts

@@ -5,7 +5,7 @@ import { tools } from "./tools/index.js";
 import type { ToolContext } from "./tools/types.js";
 import { errorResult, jsonResult } from "./tools/types.js";
 
-const SERVER_VERSION = "0.2.14";
+const SERVER_VERSION = "0.2.15";
 
 export function buildMcpServer(ctx: ToolContext): McpServer {
   const server = new McpServer({

src/http.ts

@@ -88,6 +88,18 @@ app.get("/assets/*", async (c) => {
 
 app.get("/", serveRoot);
 
+// Streamable HTTP clients probe GET /mcp for an optional standalone SSE stream.
+// This server is stateless and POST-only, so the MCP transport requires 405
+// rather than 404 to signal that clients should continue without that stream.
+app.get(
+  "/mcp",
+  () =>
+    new Response(null, {
+      status: 405,
+      headers: { Allow: "POST" },
+    }),
+);
+
 async function buildApiKeyClient(reqHeaders: Headers): Promise<{
   client: ParseableClient;
   config: Config;

test/http.test.ts

@@ -45,6 +45,14 @@ describe("HTTP routes", () => {
     expect(body).toMatch(/X-Parseable-URL/);
   });
 
+  it("GET /mcp returns 405 for stateless Streamable HTTP clients", async () => {
+    const res = await app.request("/mcp", {
+      headers: { accept: "text/event-stream" },
+    });
+    expect(res.status).toBe(405);
+    expect(res.headers.get("allow")).toBe("POST");
+  });
+
   it("POST /mcp without auth returns 401", async () => {
     const res = await app.fetch(
       new Request("http://localhost/mcp", {