FetchSandbox MCP
MCP server with runnable API sandboxes — 70+ pre-configured APIs, real webhooks, no real-API quota burned.
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What is FetchSandbox MCP?
FetchSandbox MCP is a sandbox testing platform that lets developers and AI agents build and test API integrations without calling real APIs. It integrates directly into coding assistants (Cursor, Claude, Codex CLI) and provides pre-configured sandboxes for services like Stripe, Twilio, and GitHub, enabling testing of webhooks, authentication, and responses in a controlled environment.
FetchSandbox MCP pricing
Pricing model: Freemium
FetchSandbox MCP pros
- Pre-configured sandboxes for 12+ popular APIs (Stripe, GitHub, OpenAI, Twilio, Resend, Clerk, etc.)
- Native integration with AI coding assistants via MCP protocol—test integrations without leaving your editor
- Deterministic webhook and async testing with chaos scenarios to catch edge cases like duplicate webhook firing
- Quick iteration: develop from idea to working integration in minutes without risking real API calls
FetchSandbox MCP cons
- Limited to pre-configured API sandboxes; custom or niche APIs may not be supported
- Pricing not disclosed on the landing page
- No information visible about offline/local deployment options or enterprise features
Frequently asked questions about FetchSandbox MCP
What coding assistants does FetchSandbox work with?
It works with Cursor, Claude, Codex CLI, and more via the MCP protocol.
Can I test webhooks and async scenarios?
Yes, the tool supports testing webhooks, retries, async state, and chaos scenarios like duplicate webhook delivery to catch production bugs.
Which APIs are pre-configured?
Stripe, Twilio, Resend, Clerk, Privy, AgentMail, Surge, Kulipa, WorkOS, GitHub, OpenAI, and Paddle.
Do I need to use a separate dashboard?
No, testing scenarios run directly within your coding assistant via MCP integration.