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Vue Academy · Lesson

Authenticated API Calls with Axios Interceptors

Request interceptor for Authorization header, response interceptor for 401 → refresh → retry.

The Interceptor Pattern

Rather than attaching auth headers and handling 401s in every call, Axios interceptors centralize this logic. A request interceptor adds the token; a response interceptor handles expiry and refresh transparently.

Creating the Axios Instance

Create a dedicated instance with the API base URL and withCredentials so the httpOnly refresh cookie is sent to the refresh endpoint.

import axios from 'axios'

const api = axios.create({
  baseURL: '/api',
  withCredentials: true // send cookies
})

export default api

All lessons in this course

  1. Fastify Backend for Vue SPAs
  2. JWT Authentication: Login and Refresh
  3. Authenticated API Calls with Axios Interceptors
  4. Deploying Full-Stack Vue to Production
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