diff --git a/package-lock.json b/package-lock.json
index 49c13bd..677562e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,9 @@
       "name": "template-ts-vite-kata",
       "version": "1.0.0",
       "license": "MIT",
+      "dependencies": {
+        "@supabase/supabase-js": "^2.45.1"
+      },
       "devDependencies": {
         "@eslint/js": "^8.57.0",
         "@types/eslint__js": "^8.42.3",
@@ -959,6 +962,80 @@
         "win32"
       ]
     },
+    "node_modules/@supabase/auth-js": {
+      "version": "2.64.4",
+      "resolved": "https://registry.npmjs.org/@supabase/auth-js/-/auth-js-2.64.4.tgz",
+      "integrity": "sha512-9ITagy4WP4FLl+mke1rchapOH0RQpf++DI+WSG2sO1OFOZ0rW3cwAM0nCrMOxu+Zw4vJ4zObc08uvQrXx590Tg==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/functions-js": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/@supabase/functions-js/-/functions-js-2.4.1.tgz",
+      "integrity": "sha512-8sZ2ibwHlf+WkHDUZJUXqqmPvWQ3UHN0W30behOJngVh/qHHekhJLCFbh0AjkE9/FqqXtf9eoVvmYgfCLk5tNA==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/node-fetch": {
+      "version": "2.6.15",
+      "resolved": "https://registry.npmjs.org/@supabase/node-fetch/-/node-fetch-2.6.15.tgz",
+      "integrity": "sha512-1ibVeYUacxWYi9i0cf5efil6adJ9WRyZBLivgjs+AUpewx1F3xPi7gLgaASI2SmIQxPoCEjAsLAzKPgMJVgOUQ==",
+      "license": "MIT",
+      "dependencies": {
+        "whatwg-url": "^5.0.0"
+      },
+      "engines": {
+        "node": "4.x || >=6.0.0"
+      }
+    },
+    "node_modules/@supabase/postgrest-js": {
+      "version": "1.15.8",
+      "resolved": "https://registry.npmjs.org/@supabase/postgrest-js/-/postgrest-js-1.15.8.tgz",
+      "integrity": "sha512-YunjXpoQjQ0a0/7vGAvGZA2dlMABXFdVI/8TuVKtlePxyT71sl6ERl6ay1fmIeZcqxiuFQuZw/LXUuStUG9bbg==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/realtime-js": {
+      "version": "2.10.2",
+      "resolved": "https://registry.npmjs.org/@supabase/realtime-js/-/realtime-js-2.10.2.tgz",
+      "integrity": "sha512-qyCQaNg90HmJstsvr2aJNxK2zgoKh9ZZA8oqb7UT2LCh3mj9zpa3Iwu167AuyNxsxrUE8eEJ2yH6wLCij4EApA==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14",
+        "@types/phoenix": "^1.5.4",
+        "@types/ws": "^8.5.10",
+        "ws": "^8.14.2"
+      }
+    },
+    "node_modules/@supabase/storage-js": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/@supabase/storage-js/-/storage-js-2.6.0.tgz",
+      "integrity": "sha512-REAxr7myf+3utMkI2oOmZ6sdplMZZ71/2NEIEMBZHL9Fkmm3/JnaOZVSRqvG4LStYj2v5WhCruCzuMn6oD/Drw==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/node-fetch": "^2.6.14"
+      }
+    },
+    "node_modules/@supabase/supabase-js": {
+      "version": "2.45.1",
+      "resolved": "https://registry.npmjs.org/@supabase/supabase-js/-/supabase-js-2.45.1.tgz",
+      "integrity": "sha512-/PVe3lXmalazD8BGMIoI7+ttvT1mLXy13lNcoAPtjP1TDDY83g8csZbVR6l+0/RZtvJxl3LGXfTJT4bjWgC5Nw==",
+      "license": "MIT",
+      "dependencies": {
+        "@supabase/auth-js": "2.64.4",
+        "@supabase/functions-js": "2.4.1",
+        "@supabase/node-fetch": "2.6.15",
+        "@supabase/postgrest-js": "1.15.8",
+        "@supabase/realtime-js": "2.10.2",
+        "@supabase/storage-js": "2.6.0"
+      }
+    },
     "node_modules/@types/body-parser": {
       "version": "1.19.5",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.5.tgz",
@@ -1055,11 +1132,16 @@
       "version": "22.0.2",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.0.2.tgz",
       "integrity": "sha512-yPL6DyFwY5PiMVEwymNeqUTKsDczQBJ/5T7W/46RwLU/VH+AA8aT5TZkvBviLKLbbm0hlfftEkGrNzfRk/fofQ==",
-      "dev": true,
       "dependencies": {
         "undici-types": "~6.11.1"
       }
     },
+    "node_modules/@types/phoenix": {
+      "version": "1.6.5",
+      "resolved": "https://registry.npmjs.org/@types/phoenix/-/phoenix-1.6.5.tgz",
+      "integrity": "sha512-xegpDuR+z0UqG9fwHqNoy3rI7JDlvaPh2TY47Fl80oq6g+hXT+c/LEuE43X48clZ6lOfANl5WrPur9fYO1RJ/w==",
+      "license": "MIT"
+    },
     "node_modules/@types/qs": {
       "version": "6.9.15",
       "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.15.tgz",
@@ -1093,6 +1175,15 @@
         "@types/send": "*"
       }
     },
+    "node_modules/@types/ws": {
+      "version": "8.5.12",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.5.12.tgz",
+      "integrity": "sha512-3tPRkv1EtkDpzlgyKyI8pGsGZAGPEaXeu0DOj5DI25Ja91bdAYddYHbADRYVrZMRbfW+1l5YwXVDKohDJNQxkQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@typescript-eslint/eslint-plugin": {
       "version": "7.16.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-7.16.1.tgz",
@@ -5371,6 +5462,12 @@
       "integrity": "sha512-0a5EOkAUp8D4moMi2W8ZF8jcga7BgZd91O/yabJCFY8az+XSzeGyTKs0Aoo897iV1Nj6guFq8orWDS96z91oGg==",
       "dev": true
     },
+    "node_modules/tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "license": "MIT"
+    },
     "node_modules/ts-api-utils": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-1.3.0.tgz",
@@ -5587,8 +5684,7 @@
     "node_modules/undici-types": {
       "version": "6.11.1",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.11.1.tgz",
-      "integrity": "sha512-mIDEX2ek50x0OlRgxryxsenE5XaQD4on5U2inY7RApK3SOJpofyw7uW2AyfMKkhAxXIceo2DeWGVGwyvng1GNQ==",
-      "dev": true
+      "integrity": "sha512-mIDEX2ek50x0OlRgxryxsenE5XaQD4on5U2inY7RApK3SOJpofyw7uW2AyfMKkhAxXIceo2DeWGVGwyvng1GNQ=="
     },
     "node_modules/unpipe": {
       "version": "1.0.0",
@@ -5780,6 +5876,22 @@
         }
       }
     },
+    "node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "license": "BSD-2-Clause"
+    },
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -5955,6 +6067,27 @@
       "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "dev": true
     },
+    "node_modules/ws": {
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
+      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/package.json b/package.json
index 10cc866..10e8f4f 100644
--- a/package.json
+++ b/package.json
@@ -33,5 +33,8 @@
     "typescript": "^5.5.3",
     "typescript-eslint": "^7.16.1",
     "vitest": "^2.0.3"
+  },
+  "dependencies": {
+    "@supabase/supabase-js": "^2.45.1"
   }
 }
diff --git a/src/secondary/CalendarPersistance.spec.ts b/src/secondary/CalendarPersistance.spec.ts
new file mode 100644
index 0000000..92c7dec
--- /dev/null
+++ b/src/secondary/CalendarPersistance.spec.ts
@@ -0,0 +1,28 @@
+import { createClient } from '@supabase/supabase-js';
+import { describe, it, expect } from 'vitest';
+
+import { CalendarEvent } from '../domain/CalendarEvent';
+import { Name } from '../domain/Name';
+
+import { CalendarPersistance, Database } from './CalendarPersistance';
+
+describe('CalendarPersistance', () => {
+  it('should save', async () => {
+    const client = createClient<Database>(process.env['SUPABASE_URL']!, process.env['SUPABASE_KEY']!);
+    const response = await client.from('events').insert({ id: 1 });
+    console.log(response);
+
+    const calendar = [
+      CalendarEvent.of({
+        id: 'id',
+        title: Name.of('Title'),
+        start: new Date('2024-01-01T00:00:00.000Z'),
+        end: new Date('2024-01-01T01:00:00.000Z'),
+        group: Name.of('group'),
+      }),
+    ];
+    const calendarPeristance = new CalendarPersistance(client);
+
+    calendarPeristance.save(calendar);
+  });
+});
diff --git a/src/secondary/CalendarPersistance.ts b/src/secondary/CalendarPersistance.ts
new file mode 100644
index 0000000..ccc8fa5
--- /dev/null
+++ b/src/secondary/CalendarPersistance.ts
@@ -0,0 +1,27 @@
+import { SupabaseClient } from '@supabase/supabase-js';
+
+import { Calendar } from '../domain/Calendar';
+
+export interface Database {
+  public: {
+    Tables: {
+      events: {
+        Row: {
+          id: number;
+        };
+        Insert: {
+          id: number;
+        };
+        Update: {
+          id: number;
+        };
+      };
+    };
+  };
+}
+
+export class CalendarPersistance {
+  constructor(client: SupabaseClient<Database>) {}
+
+  save(calendar: Calendar) {}
+}