diff --git a/src/__tests__/app.test.ts b/src/__tests__/app.test.ts
index 60231e2..31ab48f 100644
--- a/src/__tests__/app.test.ts
+++ b/src/__tests__/app.test.ts
@@ -149,6 +149,34 @@ describe('GET /v1/category', () => {
     })
 })
 
+describe('DELETE /v1/category', () => {
+    it('returns status code 200 and a success message', async () => {
+        const res = await request(app)
+            .delete('/v1/category')
+            .set('Content-Type', 'application/json')
+            .set('Cookie', jwtCookie as string)
+            .send(JSON.stringify({
+                name: 'VueJS Composition API'
+            }))
+
+        expect(res.status).toEqual(200)
+        expect(res.body).toHaveProperty('message')
+    })
+
+    it('returns status code 400 and an error message', async () => {
+        const res = await request(app)
+            .delete('/v1/category')
+            .set('Content-Type', 'application/json')
+            .set('Cookie', jwtCookie as string)
+            .send(JSON.stringify({
+                blablabla: 'pouet'
+            }))
+
+        expect(res.status).toEqual(400)
+        expect(res.body).toHaveProperty('message')
+    })
+})
+
 describe('PUT /v1/user', () => {
     it('returns status code 200 and success message', async () => {
         const res = await request(app)
diff --git a/src/routers/category.ts b/src/routers/category.ts
index 8338555..09fec23 100644
--- a/src/routers/category.ts
+++ b/src/routers/category.ts
@@ -1,7 +1,7 @@
-import { Category, PrismaClient } from "@prisma/client"
+import { Category, Prisma, PrismaClient } from "@prisma/client"
 import express, { RequestHandler } from "express"
 import { z } from "zod"
-import { parseJwtUserId } from "./user.js"
+import { userIdMiddleware } from "./user.js"
 
 const categoryRouter = express.Router()
 const prisma = new PrismaClient()
@@ -11,16 +11,10 @@ const categoryData = z.object({
 }).required()
 
 const categoryGet: RequestHandler = async (req, res) => {
-    const userId = parseJwtUserId(req.cookies.jwt)
-    if (userId === undefined) {
-        res.status(400).json({ message: 'Incorrect JWT payload.' })
-        return;
-    }
-
     let categories: Category[] | null = null
 
     try {
-        categories = await prisma.category.findMany({ where: { user_id: userId } })
+        categories = await prisma.category.findMany({ where: { user_id: req.body.userId } })
     } catch (error: any) {
         res.status(400).json({ message: (error.issues ?? error) })
         return;
@@ -30,18 +24,12 @@ const categoryGet: RequestHandler = async (req, res) => {
 }
 
 const categoryPost: RequestHandler = async (req, res) => {
-    const userId = parseJwtUserId(req.cookies.jwt)
-    if (userId === undefined) {
-        res.status(400).json({ message: 'Incorrect JWT payload.' })
-        return;
-    }
-
     try {
         const newCategory = categoryData.parse(req.body)
         await prisma.category.create({
             data: {
                 name: newCategory.name,
-                user_id: userId
+                user_id: req.body.userId
             }
         })
     } catch (error: any) {
@@ -52,7 +40,27 @@ const categoryPost: RequestHandler = async (req, res) => {
     res.json({ message: 'Category successfully added.' })
 }
 
-categoryRouter.get('/', categoryGet)
-categoryRouter.post('/', categoryPost)
+const categoryDelete: RequestHandler = async (req, res) => {
+    let deleted: Prisma.BatchPayload
+
+    try {
+        const categoryToDel = categoryData.parse(req.body)
+        deleted = await prisma.category.deleteMany({
+            where: {
+                name: categoryToDel.name,
+                user_id: req.body.userId
+            }
+        })
+    } catch (error: any) {
+        res.status(400).json({ message: (error.issues ?? error) })
+        return;
+    }
+
+    res.json({ message: `${deleted.count} category / categories successfully deleted.` })
+}
+
+categoryRouter.get('/', userIdMiddleware, categoryGet)
+categoryRouter.post('/', userIdMiddleware, categoryPost)
+categoryRouter.delete('/', userIdMiddleware, categoryDelete)
 
 export default categoryRouter
diff --git a/src/routers/user.ts b/src/routers/user.ts
index 980267c..5fe1bf3 100644
--- a/src/routers/user.ts
+++ b/src/routers/user.ts
@@ -21,6 +21,16 @@ export function parseJwtUserId(jwtoken: string): number | undefined {
     return payload.userId
 }
 
+export const userIdMiddleware: RequestHandler = (req, res, next) => {
+    const userId = parseJwtUserId(req.cookies.jwt)
+    if (userId === undefined) {
+        res.status(400).json({ message: 'Incorrect JWT payload.' })
+        return;
+    }
+    req.body.userId = userId
+    next()
+}
+
 const userRouterPut: RequestHandler = async (req, res) => {
     const userId = parseJwtUserId(req.cookies.jwt)
     if (userId === undefined) {