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Thunder Client

Thunder Client

Lightweight API Testing Extension for VS Code

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Last Updated:10/5/2025
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What is Thunder Client

Thunder Client is a REST API testing tool that lives inside Visual Studio Code. You can send requests, check responses, and organize your API tests without opening another program. It works just like other API testing tools but runs directly in your code editor.

The extension saves all your requests and settings on your own computer. This makes it fast, private, and able to work without internet. You can also save your testing data to Git repositories, making it easy to share with your team.

Thunder Client offers both free and paid versions. The free version works great for basic testing, while paid plans add features like unlimited test runs, team management tools, and advanced testing options for businesses.

Features of Thunder Client

  • Lightweight VS Code extension for API testing

  • Local storage keeps data private and secure

  • Git sync for team collaboration

  • Collections organize related API requests

  • Environment variables for different settings

  • Scriptless testing with simple interface

  • CLI integration for automated testing

  • GraphQL, WebSocket, and gRPC support

  • Request chaining and advanced scripting

  • AI integration through MCP Server

Thunder Client Pricing

Free
Free
  • VS Code extension
  • 30 collection runs
  • Basic API testing features
  • Local storage
  • Git sync
  • Collections and environments
  • Scriptless testing
  • Non-commercial use only
Most Popular
Individual
$49/yr
  • All free features
  • 100 collection runs
  • Team features
  • Import OpenAPI
  • Request chaining
  • Advanced scripting
  • WebSocket, SSE, gRPC
  • CLI & CI/CD integration
Business
$7
  • All individual features
  • 500 collection runs
  • Team management
  • CLI & CI/CD integration
  • WebSocket, SSE, gRPC
  • Payment by invoice
  • Suitable for companies
  • Commercial use license
Enterprise
$16
  • All business features
  • Unlimited collection runs
  • Priority support
  • Offline activation
  • Enterprise SSO
  • Encrypted environments
  • Secrets manager integration (Azure & AWS)
  • License management API

Thunder Client Use Cases

FAQ's About Thunder Client

Thunder Client offers a free version with 30 collection runs and basic features, but it is restricted to non-commercial, personal use only. For professional or business use, you need to purchase a paid license starting at $49 per year for individuals or $7 per month per user for business teams.
Thunder Client runs entirely inside Visual Studio Code as an extension, so you do not need to install separate software. It stores all data locally on your computer for better privacy and offline access. While Postman has more advanced features, Thunder Client focuses on simplicity, speed, and keeping everything in one place where you already write code.
Yes, Thunder Client supports team collaboration through Git sync, where you can save your collections to your repository. Business and Enterprise plans add dedicated team features like shared workspaces, team management tools, and the ability to pay by invoice for easier accounting.
Yes, Thunder Client works completely offline because it stores all data locally on your device. You can create, edit, and run API tests without an internet connection. This makes it perfect for testing local development servers or working in environments with limited connectivity.
Thunder Client supports REST APIs, GraphQL queries, WebSocket connections, Server-Sent Events (SSE), and gRPC requests. You can test any HTTP method including GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS. The tool handles authentication methods like Basic Auth, Bearer tokens, OAuth 2.0, AWS, and NTLM.
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