Add Google Calendar MCP server definition (npx) (#89)

Add nspady.google-calendar-mcp-npx.json for @cocal/google-calendar-mcp.
12 tools: event CRUD, free/busy, multi-account, recurring events.
OAuth auth via Google Cloud credentials file.

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>
Co-authored-by: Mohammod Al Amin Ashik <mohammod@mcpmux.com>

Author: its-mash

servers/nspady.google-calendar-mcp-npx.json

@@ -0,0 +1,79 @@
+{
+  "$schema": "../schemas/server-definition.schema.json",
+  "id": "nspady.google-calendar-mcp-npx",
+  "name": "Google Calendar (npx)",
+  "alias": "google-calendar",
+  "description": "Manage Google Calendar with multi-account support, event CRUD, free/busy checks, recurring events, and natural language scheduling. 12 tools across all calendar operations.",
+  "icon": "https://avatars.githubusercontent.com/u/587318?v=4",
+  "schema_version": "2.1",
+  "categories": [
+    "productivity"
+  ],
+  "tags": [
+    "google",
+    "calendar",
+    "scheduling",
+    "events",
+    "oauth"
+  ],
+
+  "transport": {
+    "type": "stdio",
+    "command": "npx",
+    "args": [
+      "-y",
+      "@cocal/google-calendar-mcp"
+    ],
+    "env": {
+      "GOOGLE_OAUTH_CREDENTIALS": "${input:GOOGLE_OAUTH_CREDENTIALS}"
+    },
+    "metadata": {
+      "inputs": [
+        {
+          "id": "GOOGLE_OAUTH_CREDENTIALS",
+          "label": "OAuth Credentials File",
+          "description": "Path to the Google Cloud OAuth credentials JSON file (Desktop application type).",
+          "type": "file_path",
+          "required": true,
+          "secret": false,
+          "placeholder": "/path/to/oauth-credentials.json",
+          "obtain": {
+            "url": "https://console.cloud.google.com/apis/credentials",
+            "instructions": "1. Go to Google Cloud Console > APIs & Services > Credentials\n2. Click 'Create Credentials' > 'OAuth client ID'\n3. Select 'Desktop app' as application type\n4. Download the JSON credentials file",
+            "button_label": "Create Credentials"
+          }
+        }
+      ]
+    }
+  },
+
+  "auth": {
+    "type": "oauth",
+    "instructions": "Create a Desktop OAuth 2.0 client in Google Cloud Console. Enable the Google Calendar API. Download the credentials JSON and provide the file path."
+  },
+
+  "contributor": {
+    "name": "Nathan Spady",
+    "github": "nspady",
+    "url": "https://github.com/nspady/google-calendar-mcp"
+  },
+
+  "links": {
+    "repository": "https://github.com/nspady/google-calendar-mcp",
+    "homepage": "https://calendar.google.com",
+    "documentation": "https://github.com/nspady/google-calendar-mcp#readme"
+  },
+
+  "platforms": [
+    "all"
+  ],
+
+  "capabilities": {
+    "tools": true,
+    "resources": false,
+    "prompts": false,
+    "read_only_mode": false
+  },
+
+  "changelog_url": "https://github.com/nspady/google-calendar-mcp/releases"
+}