Back to all articles
JWT API Authentication

Tutorial: How to Extract JWT Data

Josh Twist
·
December 30, 2024
·
1 min read

Learn how to extract data from a JWT and use it to implement access control on your API.

December 30, 2024

What is a JWT?

A JSON Web Token (JWT) is a compact, self-contained token in JSON format used to securely transmit information between parties. It commonly contains encoded payload data (claims) and a signature for integrity verification, ensuring that the token hasn’t been altered since it was issued.

What Data is Stored in a JWT?

A JSON Web Token (JWT) usually contains three parts: a header, a payload (claims), and a signature. The payload section often stores user-related data (e.g., user ID, roles, permissions), token expiration time, issuer, and other metadata needed by the application.

Tutorial: How to Extract Data from a JWT

In this demo, Josh shows how you can use Zuplo and it's built in auth policies to break open a JWT, forward details onto the backend and make custom rules to enforce access control.

Length: 6 minutes

Related Articles

Continue reading from the Zuplo blog.

API Gateway

Make Your Lovable App's API Production-Ready with Zuplo

Walk through adding API key auth, rate limiting, schema validation, a developer portal with self-serve keys, and an MCP server to a Lovable app using Zuplo and an OpenAPI spec.

6 min read
API Monetization

Why API Gateways Should Handle API Monetization Natively

Piecing together separate systems to monetize an API is a hassle. That's why we put native metering and billing into the API gateway itself.

5 min read

On this page

What is a JWT?What Data is Stored in a JWT?Tutorial: How to Extract Data from a JWT

Scale your APIs with
confidence.

Start for free or book a demo with our team.
Book a demoStart for Free
SOC 2 TYPE 2High Performer Spring 2025Momentum Leader Spring 2025Best Estimated ROI Spring 2025Easiest To Use Spring 2025Fastest Implementation Spring 2025

Get Updates From Zuplo

Zuplo logo
© 2026 zuplo. All rights reserved.
Products & Features
API ManagementAI GatewayMCP ServersMCP GatewayDeveloper PortalRate LimitingOpenAPI NativeGitOpsProgrammableAPI Key ManagementMulti-cloudAPI GovernanceMonetizationSelf-Serve DevX
Developers
DocumentationBlogLearning CenterCommunityChangelogIntegrations
Product
PricingSupportSign InCustomer Stories
Company
About UsMedia KitCareersStatusTrust & Compliance
Privacy PolicySecurity PoliciesTerms of ServiceTrust & Compliance
Docs
Pricing
Sign Up
Login
ContactBook a demoFAQ
Zuplo logo
DocsPricingSign Up
Login