diff --git a/apps/admin-x-activitypub/src/api/activitypub.test.ts b/apps/admin-x-activitypub/src/api/activitypub.test.ts
new file mode 100644
index 0000000000..3e742b65f4
--- /dev/null
+++ b/apps/admin-x-activitypub/src/api/activitypub.test.ts
@@ -0,0 +1,366 @@
+import {Activity, ActivityPubAPI} from './activitypub';
+
+function NotFound() {
+    return new Response(null, {
+        status: 404
+    });
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function JSONResponse(data: any, contentType = 'application/json', status = 200) {
+    return new Response(JSON.stringify(data), {
+        status,
+        headers: {
+            'Content-Type': contentType
+        }
+    });
+}
+
+type Spec = {
+    response: Response,
+    assert?: (resource: URL, init?: RequestInit) => Promise<void>
+};
+
+function Fetch(specs: Record<string, Spec>) {
+    return async function (resource: URL, init?: RequestInit): Promise<Response> {
+        const spec = specs[resource.href];
+        if (!spec) {
+            return NotFound();
+        }
+        if (spec.assert) {
+            await spec.assert(resource, init);
+        }
+        return spec.response;
+    };
+}
+
+describe('ActivityPubAPI', function () {
+    describe('getInbox', function () {
+        test('It passes the token to the inbox endpoint', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/inbox/index': {
+                    async assert(_resource, init) {
+                        const headers = new Headers(init?.headers);
+                        expect(headers.get('Authorization')).toContain('fake-token');
+                    },
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            await api.getInbox();
+        });
+
+        test('Returns an empty array when the inbox is empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/inbox/index': {
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getInbox();
+            const expected: never[] = [];
+
+            expect(actual).toEqual(expected);
+        });
+
+        test('Returns an the items array when the inbox is not empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/inbox/index': {
+                    response:
+                     JSONResponse({
+                         type: 'Collection',
+                         items: [{
+                             type: 'Create',
+                             object: {
+                                 type: 'Note'
+                             }
+                         }]
+                     })
+                }
+            });
+
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getInbox();
+            const expected: Activity[] = [
+                {
+                    type: 'Create',
+                    object: {
+                        type: 'Note'
+                    }
+                }
+            ];
+
+            expect(actual).toEqual(expected);
+        });
+    });
+
+    describe('getFollowing', function () {
+        test('It passes the token to the following endpoint', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/following/index': {
+                    async assert(_resource, init) {
+                        const headers = new Headers(init?.headers);
+                        expect(headers.get('Authorization')).toContain('fake-token');
+                    },
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            await api.getFollowing();
+        });
+
+        test('Returns an empty array when the following is empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/following/index': {
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getFollowing();
+            const expected: never[] = [];
+
+            expect(actual).toEqual(expected);
+        });
+
+        test('Returns an the items array when the following is not empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/following/index': {
+                    response:
+                     JSONResponse({
+                         type: 'Collection',
+                         items: [{
+                             type: 'Person'
+                         }]
+                     })
+                }
+            });
+
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getFollowing();
+            const expected: Activity[] = [
+                {
+                    type: 'Person'
+                }
+            ];
+
+            expect(actual).toEqual(expected);
+        });
+    });
+
+    describe('getFollowers', function () {
+        test('It passes the token to the followers endpoint', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/followers/index': {
+                    async assert(_resource, init) {
+                        const headers = new Headers(init?.headers);
+                        expect(headers.get('Authorization')).toContain('fake-token');
+                    },
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            await api.getFollowers();
+        });
+
+        test('Returns an empty array when the followers is empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/followers/index': {
+                    response: JSONResponse({
+                        type: 'Collection',
+                        items: []
+                    })
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getFollowers();
+            const expected: never[] = [];
+
+            expect(actual).toEqual(expected);
+        });
+
+        test('Returns an the items array when the followers is not empty', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/followers/index': {
+                    response:
+                     JSONResponse({
+                         type: 'Collection',
+                         items: [{
+                             type: 'Person'
+                         }]
+                     })
+                }
+            });
+
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            const actual = await api.getFollowers();
+            const expected: Activity[] = [
+                {
+                    type: 'Person'
+                }
+            ];
+
+            expect(actual).toEqual(expected);
+        });
+    });
+
+    describe('follow', function () {
+        test('It passes the token to the follow endpoint', async function () {
+            const fakeFetch = Fetch({
+                'https://auth.api/': {
+                    response: JSONResponse({
+                        identities: [{
+                            token: 'fake-token'
+                        }]
+                    })
+                },
+                'https://activitypub.api/.ghost/activitypub/actions/follow/@user@domain.com': {
+                    async assert(_resource, init) {
+                        const headers = new Headers(init?.headers);
+                        expect(headers.get('Authorization')).toContain('fake-token');
+                    },
+                    response: JSONResponse({})
+                }
+            });
+            const api = new ActivityPubAPI(
+                new URL('https://activitypub.api'),
+                new URL('https://auth.api'),
+                'index',
+                fakeFetch
+            );
+
+            await api.follow('@user@domain.com');
+        });
+    });
+});
diff --git a/apps/admin-x-activitypub/src/api/activitypub.ts b/apps/admin-x-activitypub/src/api/activitypub.ts
new file mode 100644
index 0000000000..fb7a185131
--- /dev/null
+++ b/apps/admin-x-activitypub/src/api/activitypub.ts
@@ -0,0 +1,109 @@
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export type Actor = any;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export type Activity = any;
+
+export class ActivityPubAPI {
+    constructor(
+        private readonly apiUrl: URL,
+        private readonly authApiUrl: URL,
+        private readonly handle: string,
+        private readonly fetch: (resource: URL, init?: RequestInit) => Promise<Response> = window.fetch.bind(window)
+    ) {}
+
+    private async getToken(): Promise<string | null> {
+        try {
+            const response = await this.fetch(this.authApiUrl);
+            const json = await response.json();
+            return json?.identities?.[0]?.token || null;
+        } catch (err) {
+            // TODO: Ping sentry?
+            return null;
+        }
+    }
+
+    private async fetchJSON(url: URL, method: 'GET' | 'POST' = 'GET'): Promise<object | null> {
+        const token = await this.getToken();
+        const response = await this.fetch(url, {
+            method,
+            headers: {
+                Authorization: `Bearer ${token}`,
+                Accept: 'application/activity+json'
+            }
+        });
+        const json = await response.json();
+        return json;
+    }
+
+    get inboxApiUrl() {
+        return new URL(`.ghost/activitypub/inbox/${this.handle}`, this.apiUrl);
+    }
+
+    async getInbox(): Promise<Activity[]> {
+        const json = await this.fetchJSON(this.inboxApiUrl);
+        if (json === null) {
+            return [];
+        }
+        if ('items' in json) {
+            return Array.isArray(json?.items) ? json.items : [];
+        }
+        return [];
+    }
+
+    get followingApiUrl() {
+        return new URL(`.ghost/activitypub/following/${this.handle}`, this.apiUrl);
+    }
+
+    async getFollowing(): Promise<Activity[]> {
+        const json = await this.fetchJSON(this.followingApiUrl);
+        if (json === null) {
+            return [];
+        }
+        if ('items' in json) {
+            return Array.isArray(json?.items) ? json.items : [];
+        }
+        return [];
+    }
+
+    async getFollowingCount(): Promise<number> {
+        const json = await this.fetchJSON(this.followingApiUrl);
+        if (json === null) {
+            return 0;
+        }
+        if ('totalItems' in json && typeof json.totalItems === 'number') {
+            return json.totalItems;
+        }
+        return 0;
+    }
+
+    get followersApiUrl() {
+        return new URL(`.ghost/activitypub/followers/${this.handle}`, this.apiUrl);
+    }
+
+    async getFollowers(): Promise<Activity[]> {
+        const json = await this.fetchJSON(this.followersApiUrl);
+        if (json === null) {
+            return [];
+        }
+        if ('items' in json) {
+            return Array.isArray(json?.items) ? json.items : [];
+        }
+        return [];
+    }
+
+    async getFollowersCount(): Promise<number> {
+        const json = await this.fetchJSON(this.followersApiUrl);
+        if (json === null) {
+            return 0;
+        }
+        if ('totalItems' in json && typeof json.totalItems === 'number') {
+            return json.totalItems;
+        }
+        return 0;
+    }
+
+    async follow(username: string): Promise<void> {
+        const url = new URL(`.ghost/activitypub/actions/follow/${username}`, this.apiUrl);
+        await this.fetchJSON(url, 'POST');
+    }
+}