About Us

MockAPI Dog is a free, open tool that lets developers create mock REST APIs and LLM streaming endpoints instantly — no signup, no credit card, no hassle.

Why we built this

We were tired of waiting on backend teams, paying for staging environments, and wrestling with complex mock setups just to test a frontend feature. So we built MockAPI Dog — a tool that gives you a working API endpoint in seconds.

What you can do

• Create mock REST APIs with custom JSON responses, status codes, and delays.
• Spin up mock LLM endpoints that stream responses like OpenAI and Anthropic — perfect for testing AI integrations without burning tokens.
• Browse the Mock API Library for ready-made endpoints you can use right away.

Our principles

• Free to use — always.
• No signup required — start in seconds.
• Developer-first — built by developers, for developers.
• Privacy-friendly — we don't sell your data.

Get in touch

Have questions, feedback, or ideas? Reach out on our Discord server or visit the Contact page.