A free service to generate custom HTTP endpoints for testing and viewing request/response logs, with OpenAPI support.
Mockbin by Zuplo is a free service that allows developers to generate custom HTTP endpoints for testing APIs, inspecting request and response logs, and mocking OpenAPI specifications. It solves the problem of needing a quick, no-setup way to test HTTP interactions and demo APIs without deploying actual backend services.
Developers, QA engineers, and technical educators who need to test HTTP APIs, debug webhooks, or create live demos without managing infrastructure.
It offers a completely free, instant endpoint generation with OpenAPI support, replacing the deprecated mockbin.org, and is built for simplicity and speed in API testing workflows.
Mockbin by Zuplo. Mock, Test, and View HTTP Requests and Responses
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Completely free with no account required, enabling instant access for API testing and mocking without financial or registration barriers, as highlighted in the README.
Users can generate custom HTTP endpoints immediately by visiting mockbin.io and creating a new bin, demonstrated in the usage GIF for rapid testing workflows.
Supports uploading OpenAPI files to automatically generate mock endpoints, speeding up API development and testing, as mentioned in the key features.
Built with a Next.js frontend deployable to Vercel and a Zuplo backend with Cloudflare R2, offering flexibility for self-hosting or using the hosted service.
As a free service, there is no guarantee on how long request logs are stored, which could limit long-term testing or debugging scenarios.
Focused on simplicity, it lacks advanced features like dynamic response generation, conditional logic, or scripting, making it less suitable for complex mocking needs.
Self-hosting requires Zuplo and Cloudflare R2 or similar S3-compatible storage, creating dependencies on specific services and potential setup complexity, as noted in the 'How it works' section.
Mockbin () is an open-source alternative to the following products: