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markus41
markus41COMMUNITY
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Keycloak FastAPI Integration

Integrate Keycloak into FastAPI with OpenID Connect and OAuth2 for JWT validation.

18|2|Updated Dec 12, 2025
Search Tags:#authorization#authentication#fastapi#jwt#sso#oidc#keycloak
One-click install
npx skills add https://github.com/markus41/claude --skill keycloak-fastapi-integration
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Keycloak FastAPI Integration
Source: https://github.com/markus41/claude/tree/main/plugins/fastapi-backend/skills/keycloak-fastapi
Command: npx skills add https://github.com/markus41/claude --skill keycloak-fastapi-integration

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill simplifies the integration of Keycloak for robust authentication and authorization in FastAPI applications, enabling Single Sign-On (SSO) and role-based access control.

Core Features & Use Cases

  • OIDC/OAuth2 Integration: Seamlessly connect FastAPI with Keycloak using standard protocols.
  • JWT Validation: Securely validate access tokens issued by Keycloak.
  • Role-Based Access Control: Implement fine-grained access control based on user roles defined in Keycloak.
  • Use Case: Protect your API endpoints, ensuring only authenticated users with the correct roles can access sensitive data or perform specific actions.

Quick Start

Use the Keycloak FastAPI Integration skill to protect the '/api/v1/profile' endpoint with JWT validation.

Frequently Asked Questions about Keycloak FastAPI Integration

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I integrate Keycloak SSO with FastAPI for user authentication?▼

To integrate Keycloak SSO with FastAPI, you use OpenID Connect and OAuth2 protocols to validate JWT tokens issued by Keycloak, enabling secure user authentication and Single Sign-On across your API endpoints.

How does JWT token validation work with Keycloak in FastAPI?▼

JWT token validation in FastAPI with Keycloak works by verifying the access tokens issued by the Keycloak identity provider, ensuring that only authenticated users can access protected API endpoints.

Can I implement role-based access control in FastAPI using Keycloak?▼

Yes, you can implement role-based access control in FastAPI using Keycloak by enforcing fine-grained access restrictions on sensitive API endpoints based on user roles defined in the Keycloak identity provider.

What is the best way to configure Keycloak settings in a FastAPI application?▼

The best way to configure Keycloak settings in a FastAPI application is using Pydantic settings, which provide a structured method for managing OpenID Connect and OAuth2 identity provider configurations.

Does FastAPI support token refresh flows when using Keycloak?▼

Yes, FastAPI supports token refresh flows when integrated with Keycloak, allowing your application to securely maintain user sessions by automatically refreshing expired JWT access tokens.

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