# Thunder Client

**Canonical:** https://apis.io/providers/thunder-client/  
**Website:** https://www.thunderclient.com  
**APIs profiled:** 2

Thunder Client is a lightweight REST API client extension for Visual Studio Code created by Ranga Vadhineni, providing a clean interface for sending HTTP requests, managing collections, and testing APIs without leaving the editor. With nearly 7 million installs, it pioneered GUI-based API testing in VS Code with 100% local storage, scriptless testing, Git Sync for team collaboration, GraphQL support, and an advanced CLI for CI/CD integration. Thunder Client supports importing collections from Postman, Insomnia, Hoppscotch, and OpenAPI 3.0, and offers pre/post-request scripting and environment variables.

## Kin Score — 24.6 / 100 (emerging)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 24.6).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 15.5 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 28.9 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 26.3 |
| Access Clarity | 26.3 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (2)

- **Thunder Client** — Thunder Client is the flagship VS Code REST API client extension offering a lightweight GUI for sending HTTP requests, managing collections with environment variables, and runni...
- **Thunder Client CLI** — The Thunder Client CLI (@thunderclient/cli) is a Node.js command-line tool for running Thunder Client requests, collections, and cURL commands from the terminal. It supports CI/...

## Security (1)

- **Thunder Client Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Thunder Client Plans Pricing**

## Tags

API Client, API Testing, CI/CD, CLI, Collection, GraphQL, REST Client, VS Code

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/thunder-client/). Scores are computed from the provider's own public artifacts under a published rubric.