diff --git a/src/lib/reports/clients.test.ts b/src/lib/reports/clients.test.ts
new file mode 100644
index 0000000..7989112
--- /dev/null
+++ b/src/lib/reports/clients.test.ts
@@ -0,0 +1,7 @@
+import { Reports } from './reports'
+
+describe('Clients', () => {
+    it('creates', () => {
+        expect(new Reports({} as never, {} as never)).toBeTruthy()
+    })
+})
diff --git a/src/lib/reports/reports.ts b/src/lib/reports/reports.ts
new file mode 100644
index 0000000..317c4dc
--- /dev/null
+++ b/src/lib/reports/reports.ts
@@ -0,0 +1,19 @@
+import { AxiosInstance } from 'axios'
+import { TimelyAppConfig } from '../types'
+
+export class Reports {
+    constructor(private readonly http: AxiosInstance, private readonly config: TimelyAppConfig) {}
+
+    async getByExternalId(
+        externalId: string,
+        filter: {
+            group_by?: string[]
+            project_ids?: number[]
+            since?: string
+            until?: string
+        },
+    ) {
+        const { data } = await this.http.post(`/${this.config.accountId}/reports/filter`, filter)
+        return data
+    }
+}
diff --git a/src/lib/timely-app.ts b/src/lib/timely-app.ts
index ecfd1ca..c69ccec 100644
--- a/src/lib/timely-app.ts
+++ b/src/lib/timely-app.ts
@@ -8,6 +8,7 @@ import { Projects } from './projects/projects'
 import { Users } from './users/users'
 import { createHttpClient } from './http/http'
 import { Teams } from './teams/teams'
+import { Reports } from './reports/reports'
 
 export class TimelyApp {
     readonly accounts: Accounts
@@ -26,6 +27,8 @@ export class TimelyApp {
 
     readonly users: Users
 
+    readonly reports: Reports
+
     constructor(private readonly config: TimelyAppConfig) {
         this.validateConfig()
         const httpConfig = {
@@ -44,6 +47,7 @@ export class TimelyApp {
         this.projects = new Projects(this.http, this.config)
         this.teams = new Teams(this.http, this.config)
         this.users = new Users(this.http, this.config)
+        this.reports = new Reports(this.http, this.config)
     }
 
     private validateConfig() {