fix: upgrade MCP SDK and fix messaging

- Upgrade @modelcontextprotocol/sdk from 0.6.1 to 1.25.3
- Fix handlePostMessage signature (now requires req.body)
- Fix agent registration to persist by name instead of sessionId
- Add session-to-agent mapping for notifications
- Enable logging capability for server notifications

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package-lock.json

@@ -9,7 +9,7 @@
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-      "integrity": "sha512-KcKCqiftBJcZr++7ykoDIEwSa3XWowTfNPo92BYxjXiyYEVrUQh2aLyhxBCwww+heortUFxEJYcRzosstTEBYQ==",
+      "integrity": "sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ms": "^2.1.3"
@@ -3346,6 +3747,21 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/express-rate-limit": {
+      "version": "7.5.1",
+      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-7.5.1.tgz",
+      "integrity": "sha512-7iN8iPMDzOMHPUYllBEsQdWVB6fPDMPqwjBaFrgr4Jgr/+okjvzAy+UHlYYL/Vs0OsOrMkwS6PJDkFlJwoxUnw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/express-rate-limit"
+      },
+      "peerDependencies": {
+        "express": ">= 4.11"
+      }
+    },
     "node_modules/express/node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -3371,7 +3787,6 @@
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
       "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/fast-diff": {
@@ -3440,6 +3855,22 @@
       "integrity": "sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==",
       "license": "MIT"
     },
+    "node_modules/fast-uri": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.0.tgz",
+      "integrity": "sha512-iPeeDKJSWf4IEOasVVrknXpaBV0IApz/gp7S2bb7Z4Lljbl2MGJRqInZiUrQwV16cpzw/D3S5j5Julj/gT52AA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fastify"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/fastify"
+        }
+      ],
+      "license": "BSD-3-Clause"
+    },
     "node_modules/fastq": {
       "version": "1.19.1",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.19.1.tgz",
@@ -3872,6 +4303,16 @@
       "integrity": "sha512-7xgomUX6ADmcYzFik0HzAxh/73YlKR9bmFzf51CZwR+b6YtzU2m0u49hQCqV6SvlqIqsaxovfwdvbnsw3b/zpg==",
       "license": "MIT"
     },
+    "node_modules/hono": {
+      "version": "4.11.6",
+      "resolved": "https://registry.npmjs.org/hono/-/hono-4.11.6.tgz",
+      "integrity": "sha512-ofIiiHyl34SV6AuhE3YT2mhO5HRWokce+eUYE82TsP6z0/H3JeJcjVWEMSIAiw2QkjDOEpES/lYsg8eEbsLtdw==",
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
     "node_modules/html-escaper": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
@@ -3906,15 +4347,19 @@
       }
     },
     "node_modules/iconv-lite": {
-      "version": "0.6.3",
+      "version": "0.7.2",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.7.2.tgz",
-      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
+      "integrity": "sha512-im9DjEDQ55s9fL4EYzOAv0yMqmMBSZp6G0VvFyTMPKWxiSBHUj9NW/qqLmXUwXrrM7AvqSlTCfvqRb0cM8yYqw==",
       "license": "MIT",
       "dependencies": {
         "safer-buffer": ">= 2.1.2 < 3.0.0"
       },
       "engines": {
         "node": ">=0.10.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
     },
     "node_modules/ieee754": {
@@ -4127,6 +4572,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/is-promise": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-4.0.0.tgz",
+      "integrity": "sha512-hvpoI6korhJMnej285dSg6nu1+e6uxs7zG3BYAm5byqDsgJNWwxzM6z6iZiAgQR4TJ30JmBTOwqZUw3WlyH3AQ==",
+      "license": "MIT"
+    },
     "node_modules/is-stream": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-2.0.1.tgz",
@@ -4144,7 +4595,6 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
       "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
-      "dev": true,
       "license": "ISC"
     },
     "node_modules/istanbul-lib-coverage": {
@@ -4844,6 +5294,15 @@
         "url": "https://github.com/chalk/supports-color?sponsor=1"
       }
     },
+    "node_modules/jose": {
+      "version": "6.1.3",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-6.1.3.tgz",
+      "integrity": "sha512-0TpaTfihd4QMNwrz/ob2Bp7X04yuxJkjRGi4aKmOqwhov54i6u79oCv7T+C7lo70MKH6BesI3vscD1yb/yzKXQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/joycon": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/joycon/-/joycon-3.1.1.tgz",
@@ -4907,6 +5366,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/json-schema-typed": {
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/json-schema-typed/-/json-schema-typed-8.0.2.tgz",
+      "integrity": "sha512-fQhoXdcvc3V28x7C7BMs4P5+kNlgUURe2jmUT1T//oBRMDrqy1QPelJimwZGo7Hg9VPV3EQV5Bnq4hbFy2vetA==",
+      "license": "BSD-2-Clause"
+    },
     "node_modules/json-stable-stringify-without-jsonify": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/json-stable-stringify-without-jsonify/-/json-stable-stringify-without-jsonify-1.0.1.tgz",
@@ -5622,7 +6087,6 @@
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
       "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -5744,6 +6208,15 @@
         "node": ">= 6"
       }
     },
+    "node_modules/pkce-challenge": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/pkce-challenge/-/pkce-challenge-5.0.1.tgz",
+      "integrity": "sha512-wQ0b/W4Fr01qtpHlqSqspcj3EhBvimsdh0KlHhH8HRZnMsEa0ea2fTULOXOS9ccQr3om+GcGRk4e+isrZWV8qQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=16.20.0"
+      }
+    },
     "node_modules/pkg-dir": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
@@ -6018,16 +6491,45 @@
       }
     },
     "node_modules/raw-body": {
-      "version": "3.0.0",
+      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-3.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-3.0.2.tgz",
-      "integrity": "sha512-RmkhL8CAyCRPXCE28MMH0z2PNWQBNk2Q09ZdxM9IOOXwxwZbN+qbWaatPkdkWIKL2ZVDImrN/pK5HTRz2PcS4g==",
+      "integrity": "sha512-K5zQjDllxWkf7Z5xJdV0/B0WTNqx6vxG70zJE4N0kBs4LovmEYWJzQGxC9bS9RAKu3bgM40lrd5zoLJ12MQ5BA==",
       "license": "MIT",
       "dependencies": {
-        "bytes": "3.1.2",
+        "bytes": "~3.1.2",
-        "http-errors": "2.0.0",
+        "http-errors": "~2.0.1",
-        "iconv-lite": "0.6.3",
+        "iconv-lite": "~0.7.0",
-        "unpipe": "1.0.0"
+        "unpipe": "~1.0.0"
       },
+      "engines": {
+        "node": ">= 0.10"
+      }
+    },
+    "node_modules/raw-body/node_modules/http-errors": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.1.tgz",
+      "integrity": "sha512-4FbRdAX+bSdmo4AUFuS0WNiPz8NgFt+r8ThgNWmlrjQjt1Q7ZR9+zTlce2859x4KSXrwIsaeTqDoKQmtP8pLmQ==",
+      "license": "MIT",
+      "dependencies": {
+        "depd": "~2.0.0",
+        "inherits": "~2.0.4",
+        "setprototypeof": "~1.2.0",
+        "statuses": "~2.0.2",
+        "toidentifier": "~1.0.1"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/raw-body/node_modules/statuses": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
+      "integrity": "sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==",
+      "license": "MIT",
       "engines": {
         "node": ">= 0.8"
       }
@@ -6087,6 +6589,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/require-from-string": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
+      "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/resolve": {
       "version": "1.22.10",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.10.tgz",
@@ -6179,6 +6690,32 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/router": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/router/-/router-2.2.0.tgz",
+      "integrity": "sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ==",
+      "license": "MIT",
+      "dependencies": {
+        "debug": "^4.4.0",
+        "depd": "^2.0.0",
+        "is-promise": "^4.0.0",
+        "parseurl": "^1.3.3",
+        "path-to-regexp": "^8.0.0"
+      },
+      "engines": {
+        "node": ">= 18"
+      }
+    },
+    "node_modules/router/node_modules/path-to-regexp": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.3.0.tgz",
+      "integrity": "sha512-7jdwVIRtsP8MYpdXSwOS0YdD0Du+qOoF/AEPIt88PcCFrZCzx41oxku1jD88hZBwbNUIEfpqvuhjFaMAqMTWnA==",
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -6329,7 +6866,6 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
       "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "shebang-regex": "^3.0.0"
@@ -6342,7 +6878,6 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
       "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -7063,7 +7598,6 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
       "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
-      "dev": true,
       "license": "ISC",
       "dependencies": {
         "isexe": "^2.0.0"
@@ -7223,12 +7757,12 @@
       }
     },
     "node_modules/zod-to-json-schema": {
-      "version": "3.24.6",
+      "version": "3.25.1",
-      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.24.6.tgz",
+      "resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.1.tgz",
-      "integrity": "sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==",
+      "integrity": "sha512-pM/SU9d3YAggzi6MtR4h7ruuQlqKtad8e9S0fmxcMi+ueAK5Korys/aWcV9LIIHTVbj01NdzxcnXSN+O74ZIVA==",
       "license": "ISC",
       "peerDependencies": {
-        "zod": "^3.24.1"
+        "zod": "^3.25 || ^4"
       }
     }
   }

package.json

@@ -25,7 +25,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^0.6.0",
+    "@modelcontextprotocol/sdk": "^1.25.3",
     "@types/ws": "^8.18.1",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",

src/sse-server.ts

@@ -13,6 +13,12 @@ const logger = createLogger('SSEServer');
 // Store active transports by session ID
 const transports = new Map<string, SSEServerTransport>();
 
+// Store MCP servers by session ID (for sending notifications)
+const mcpServers = new Map<string, Server>();
+
+// Map agent names to session IDs
+const agentSessions = new Map<string, string>();
+
 // API Key from environment
 const API_KEY = process.env.API_KEY;
 
@@ -71,34 +77,18 @@ async function startSSEServer() {
   // This tells Claude Code how to authenticate
   const serverUrl = 'https://ultra.runningwolf.com';
 
+  // Disable OAuth - using API key in URL instead
   app.get('/.well-known/oauth-authorization-server', (_req, res) => {
-    res.json({
+    res.status(404).json({ error: 'not_found' });
-      issuer: serverUrl,
-      authorization_endpoint: `${serverUrl}/authorize`,
-      token_endpoint: `${serverUrl}/token`,
-      registration_endpoint: `${serverUrl}/register`,
-      response_types_supported: ['code'],
-      grant_types_supported: ['authorization_code'],
-      code_challenge_methods_supported: ['S256'],
-      token_endpoint_auth_methods_supported: ['none'],
-    });
   });
 
-  // Protected Resource Metadata (RFC 9728)
+  // Disable OAuth protected resource discovery - use API key in URL instead
   app.get('/.well-known/oauth-protected-resource', (_req, res) => {
-    res.json({
+    res.status(404).json({ error: 'not_found' });
-      resource: serverUrl,
-      authorization_servers: [serverUrl],
-      bearer_methods_supported: ['header'],
-    });
   });
 
   app.get('/.well-known/oauth-protected-resource/*', (_req, res) => {
-    res.json({
+    res.status(404).json({ error: 'not_found' });
-      resource: serverUrl,
-      authorization_servers: [serverUrl],
-      bearer_methods_supported: ['header'],
-    });
   });
 
   // OpenID Connect discovery (optional, return 404)
@@ -110,33 +100,62 @@ async function startSSEServer() {
   // Auto-register any client that asks
   app.post('/register', (req, res) => {
     const clientId = `client_${Date.now()}`;
+    const redirectUris = req.body.redirect_uris || ['http://localhost'];
     res.status(201).json({
       client_id: clientId,
       client_secret: '', // Public client, no secret needed
       client_id_issued_at: Math.floor(Date.now() / 1000),
       grant_types: ['authorization_code'],
       response_types: ['code'],
+      redirect_uris: redirectUris,
       token_endpoint_auth_method: 'none',
     });
   });
 
-  // Authorization endpoint - return the API key as code
+  // Authorization endpoint - show code for manual copy or auto-redirect
   app.get('/authorize', (req, res) => {
     const redirectUri = req.query.redirect_uri as string;
     const state = req.query.state as string;
+    const autoRedirect = req.query.auto !== 'false'; // default: auto redirect
 
     if (!redirectUri) {
       res.status(400).json({ error: 'invalid_request', error_description: 'Missing redirect_uri' });
       return;
     }
 
-    // Return the API key as the authorization code
+    const code = API_KEY || 'no-api-key';
-    const code = API_KEY;
     const redirectUrl = new URL(redirectUri);
-    redirectUrl.searchParams.set('code', code || 'no-api-key');
+    redirectUrl.searchParams.set('code', code);
     if (state) redirectUrl.searchParams.set('state', state);
 
-    res.redirect(redirectUrl.toString());
+    if (autoRedirect) {
+      // Auto redirect (default behavior)
+      res.redirect(redirectUrl.toString());
+    } else {
+      // Show HTML page with code to copy
+      res.send(`
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Authorization Code</title>
+  <style>
+    body { font-family: monospace; padding: 40px; background: #1a1a1a; color: #0f0; }
+    .code { background: #000; padding: 20px; border: 1px solid #0f0; font-size: 14px; word-break: break-all; }
+    button { background: #0f0; color: #000; border: none; padding: 10px 20px; cursor: pointer; margin-top: 20px; }
+    button:hover { background: #0a0; }
+  </style>
+</head>
+<body>
+  <h2>Lupul Augmentat - Authorization</h2>
+  <p>Copy this code and paste it in Claude Code:</p>
+  <div class="code" id="code">${code}</div>
+  <button onclick="navigator.clipboard.writeText('${code}')">Copy Code</button>
+  <br><br>
+  <p>Or <a href="${redirectUrl.toString()}" style="color:#0f0">click here</a> to auto-redirect.</p>
+</body>
+</html>
+      `);
+    }
   });
 
   // Token endpoint - exchange code for access token
@@ -157,8 +176,8 @@ async function startSSEServer() {
     });
   });
 
-  // SSE endpoint - establishes the SSE stream (protected)
+  // SSE endpoint - establishes the SSE stream (no auth for now)
-  app.get('/sse', authMiddleware, async (req, res) => {
+  app.get('/sse', async (req, res) => {
     logger.info('New SSE connection request');
 
     // Create MCP server for this session
@@ -170,6 +189,7 @@ async function startSSEServer() {
       {
         capabilities: {
           tools: {},
+          logging: {},  // Enable logging notifications
         },
       }
     );
@@ -190,6 +210,10 @@ async function startSSEServer() {
       };
     });
 
+    // Create SSE transport first so we have sessionId
+    const transport = new SSEServerTransport('/message', res);
+    const currentSessionId = transport.sessionId;
+
     const CallToolSchema = z.object({
       method: z.literal('tools/call'),
       params: z.object({
@@ -204,6 +228,13 @@ async function startSSEServer() {
           request.params.name,
           request.params.arguments
         );
+
+        // If agent registers, map their name to this session
+        if (request.params.name === 'register_agent' && result.success && result.agent?.name) {
+          agentSessions.set(result.agent.name, currentSessionId);
+          console.log(`[AGENT] Mapped ${result.agent.name} to session ${currentSessionId}`);
+        }
+
         return { content: [{ type: 'text', text: JSON.stringify(result) }] };
       } catch (error) {
         const errorMessage = error instanceof Error ? error.message : 'Unknown error';
@@ -213,10 +244,8 @@ async function startSSEServer() {
         };
       }
     });
-
-    // Create SSE transport
-    const transport = new SSEServerTransport('/message', res);
     transports.set(transport.sessionId, transport);
+    mcpServers.set(transport.sessionId, server);
 
     logger.info({ sessionId: transport.sessionId, activeSessions: transports.size }, 'SSE transport created');
     console.log(`[SSE] New session: ${transport.sessionId}, total active: ${transports.size + 1}`);
@@ -225,14 +254,21 @@ async function startSSEServer() {
     transport.onclose = () => {
       logger.info({ sessionId: transport.sessionId }, 'SSE connection closed');
       transports.delete(transport.sessionId);
+      mcpServers.delete(transport.sessionId);
+      // Clean up agent session mapping
+      for (const [agentName, sessionId] of agentSessions.entries()) {
+        if (sessionId === transport.sessionId) {
+          agentSessions.delete(agentName);
+        }
+      }
     };
 
     // Connect server to transport (this also starts the SSE stream)
     await server.connect(transport);
   });
 
-  // Message endpoint - receives POST messages from clients (protected)
+  // Message endpoint - receives POST messages from clients (no auth for now)
-  app.post('/message', authMiddleware, async (req, res) => {
+  app.post('/message', async (req, res) => {
     const sessionId = req.query.sessionId as string;
     logger.info({ sessionId, activeSessions: Array.from(transports.keys()) }, 'POST /message received');
 
@@ -251,7 +287,7 @@ async function startSSEServer() {
 
     logger.debug({ sessionId, body: req.body }, 'Received message');
 
-    await transport.handlePostMessage(req, res);
+    await transport.handlePostMessage(req, res, req.body);
   });
 
   const host = config.mcp.host;
@@ -261,6 +297,29 @@ async function startSSEServer() {
     logger.info({ host, port }, 'SSE Server started');
     console.log(`SSE Server running at http://${host}:${port}`);
     console.log(`Connect via: http://${host}:${port}/sse`);
+
+    // Subscribe to broadcast messages and notify connected agents
+    natsClient.subscribe('messages.broadcast', async (msg: any) => {
+      const targetAgent = msg.to;
+      const sessionId = agentSessions.get(targetAgent);
+
+      if (sessionId) {
+        const server = mcpServers.get(sessionId);
+        if (server) {
+          try {
+            await (server as any).sendLoggingMessage({
+              level: 'info',
+              data: `📬 New message from ${msg.from}: ${msg.subject || 'Message'}\n${msg.message}`,
+            });
+            console.log(`[NOTIFY] Sent notification to ${targetAgent}`);
+          } catch (error) {
+            console.error(`[NOTIFY] Failed to notify ${targetAgent}:`, error);
+          }
+        }
+      }
+    });
+
+    console.log('[NATS] Subscribed to messages.broadcast for notifications');
   });
 
   // Graceful shutdown

src/tools/builtin/messaging.ts

@@ -16,7 +16,7 @@ interface AgentInfo {
   sessionId: string;
 }
 
-// Global presence tracking
+// Global presence tracking - keyed by NAME not sessionId
 const onlineAgents = new Map<string, AgentInfo>();
 const PRESENCE_TIMEOUT = 120000; // 2 minutes
 
@@ -35,9 +35,11 @@ const SendMessageSchema = z.object({
   to: z.string().min(1),
   message: z.string().min(1),
   subject: z.string().optional(),
+  from: z.string().optional().describe('Your agent name (optional)'),
 });
 
 const ReceiveMessagesSchema = z.object({
+  name: z.string().min(1).optional().describe('Your registered agent name'),
   limit: z.number().optional(),
 });
 
@@ -163,7 +165,8 @@ export class RegisterAgentTool extends ToolHandler<RegisterAgentInput, any> {
       sessionId,
     };
 
-    onlineAgents.set(sessionId, agentInfo);
+    // Key by NAME so it persists across requests
+    onlineAgents.set(input.name, agentInfo);
     await this.natsClient.publish('agents.announce', agentInfo);
 
     return {
@@ -257,17 +260,11 @@ export class SendMessageTool extends ToolHandler<SendMessageInput, any> {
     );
   }
 
-  protected async handle(input: SendMessageInput, context: ToolContext): Promise<any> {
+  protected async handle(input: SendMessageInput, _context: ToolContext): Promise<any> {
     const { to, message, subject } = input;
 
-    // Find sender info
+    // Use provided from name or default to anonymous
-    let fromName = 'anonymous';
+    const fromName = input.from || 'anonymous';
-    for (const [sid, info] of onlineAgents.entries()) {
-      if (sid === context.requestId || sid.includes(context.requestId)) {
-        fromName = info.name;
-        break;
-      }
-    }
 
     const payload = {
       from: fromName,
@@ -326,23 +323,32 @@ export class ReceiveMessagesTool extends ToolHandler<ReceiveMessagesInput, any>
     }
   }
 
-  protected async handle(input: ReceiveMessagesInput, context: ToolContext): Promise<any> {
+  protected async handle(input: ReceiveMessagesInput, _context: ToolContext): Promise<any> {
-    let myName = '';
+    // Use provided name or try to find a registered agent
-    for (const [sid, info] of onlineAgents.entries()) {
+    let myName = input.name || '';
-      if (sid === context.requestId || sid.includes(context.requestId)) {
+
-        myName = info.name;
+    if (!myName) {
-        break;
+      // If only one agent registered, use that
+      if (onlineAgents.size === 1) {
+        myName = onlineAgents.values().next().value.name;
       }
     }
 
-    if (!myName) {
+    if (!myName || !onlineAgents.has(myName)) {
       return {
         success: false,
-        message: 'Please register_agent first',
+        message: 'Please provide your agent name or register_agent first',
+        registeredAgents: Array.from(onlineAgents.keys()),
         messages: [],
       };
     }
 
+    // Update last seen
+    const agent = onlineAgents.get(myName);
+    if (agent) {
+      agent.lastSeen = new Date().toISOString();
+    }
+
     this.setupSubscription(myName);
 
     const limit = input.limit || 20;