---
title: "Build a Flask App with Okta for Secure OIDC Login and Authorized API Calls"
url: https://daily.dev/posts/build-a-flask-app-with-okta-for-secure-oidc-login-and-authorized-api-calls-h5wd4rx6e
source_url: https://developer.okta.com/blog/2026/07/28/flask-oauth-web-app
type: article
source: "Okta Dev"
published: 2026-07-28T08:34:28.710Z
updated: 2026-07-28T08:34:49.790Z
tags: ["python", "authentication", "flask", "okta"]
reading_time: 18
upvotes: 0
comments: 0
language: en
---

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# Build a Flask App with Okta for Secure OIDC Login and Authorized API Calls

**[Okta Dev](https://daily.dev/sources/okta)** · 18 min read · 0 upvotes · 0 comments

## Summary

Step-by-step guide to building a Flask web app with secure OIDC login using Okta and the Authlib library. Covers setting up an Okta app integration, implementing the Authorization Code flow with PKCE, enabling self-service user registration, and using scoped OAuth 2.0 access tokens to call a protected backend API. Includes JWT validation on the resource server, custom scope enforcement, and full HTML/CSS for the frontend.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://developer.okta.com/blog/2026/07/28/flask-oauth-web-app>

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---

Tags: [#python](https://daily.dev/tags/python), [#authentication](https://daily.dev/tags/authentication), [#flask](https://daily.dev/tags/flask), [#okta](https://daily.dev/tags/okta)

[View this post on daily.dev](https://daily.dev/posts/build-a-flask-app-with-okta-for-secure-oidc-login-and-authorized-api-calls-h5wd4rx6e)