Merge pull request #643 from modelcontextprotocol/ihrpr/june-protocol-version

update latest protocol version

Author: bhosmer-ant

src/client/auth.test.ts

@@ -1,3 +1,4 @@
+import { LATEST_PROTOCOL_VERSION } from '../types.js';
 import {
   discoverOAuthMetadata,
   startAuthorization,
@@ -202,7 +203,7 @@ describe("OAuth Authorization", () => {
       const [url, options] = calls[0];
       expect(url.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
       expect(options.headers).toEqual({
-        "MCP-Protocol-Version": "2025-03-26"
+        "MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
       });
     });
 

src/integration-tests/stateManagementStreamableHttp.test.ts

@@ -5,7 +5,7 @@ import { Client } from '../client/index.js';
 import { StreamableHTTPClientTransport } from '../client/streamableHttp.js';
 import { McpServer } from '../server/mcp.js';
 import { StreamableHTTPServerTransport } from '../server/streamableHttp.js';
-import { CallToolResultSchema, ListToolsResultSchema, ListResourcesResultSchema, ListPromptsResultSchema, DEFAULT_NEGOTIATED_PROTOCOL_VERSION } from '../types.js';
+import { CallToolResultSchema, ListToolsResultSchema, ListResourcesResultSchema, ListPromptsResultSchema, LATEST_PROTOCOL_VERSION } from '../types.js';
 import { z } from 'zod';
 
 describe('Streamable HTTP Transport Session Management', () => {
@@ -145,7 +145,7 @@ describe('Streamable HTTP Transport Session Management', () => {
         params: {}
       }, ListToolsResultSchema);
 
-      
+
     });
     it('should operate without session management', async () => {
       // Create and connect a client
@@ -220,15 +220,15 @@ describe('Streamable HTTP Transport Session Management', () => {
       });
 
       const transport = new StreamableHTTPClientTransport(baseUrl);
-      
+
       // Verify protocol version is not set before connecting
       expect(transport.protocolVersion).toBeUndefined();
-      
+
       await client.connect(transport);
-      
+
       // Verify protocol version is set after connecting
-      expect(transport.protocolVersion).toBe(DEFAULT_NEGOTIATED_PROTOCOL_VERSION);
-      
+      expect(transport.protocolVersion).toBe(LATEST_PROTOCOL_VERSION);
+
       // Clean up
       await transport.close();
     });

src/types.test.ts

@@ -12,14 +12,15 @@ describe("Types", () => {
 
     test("should have correct latest protocol version", () => {
         expect(LATEST_PROTOCOL_VERSION).toBeDefined();
-        expect(LATEST_PROTOCOL_VERSION).toBe("2025-03-26");
+        expect(LATEST_PROTOCOL_VERSION).toBe("2025-06-17");
     });
     test("should have correct supported protocol versions", () => {
         expect(SUPPORTED_PROTOCOL_VERSIONS).toBeDefined();
         expect(SUPPORTED_PROTOCOL_VERSIONS).toBeInstanceOf(Array);
         expect(SUPPORTED_PROTOCOL_VERSIONS).toContain(LATEST_PROTOCOL_VERSION);
         expect(SUPPORTED_PROTOCOL_VERSIONS).toContain("2024-11-05");
         expect(SUPPORTED_PROTOCOL_VERSIONS).toContain("2024-10-07");
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toContain("2025-03-26");
     });
 
     describe("ResourceLink", () => {

src/types.ts

@@ -1,9 +1,10 @@
 import { z, ZodTypeAny } from "zod";
 
-export const LATEST_PROTOCOL_VERSION = "2025-03-26";
+export const LATEST_PROTOCOL_VERSION = "2025-06-17";
 export const DEFAULT_NEGOTIATED_PROTOCOL_VERSION = "2025-03-26";
 export const SUPPORTED_PROTOCOL_VERSIONS = [
   LATEST_PROTOCOL_VERSION,
+  "2025-03-26",
   "2024-11-05",
   "2024-10-07",
 ];