Optic is an OpenAPI linting, diffing, and testing tool that helps prevent breaking changes, publish accurate documentation, and improve API design.
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Mar 2, 2018
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Jan 8, 2026
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A collective list of free APIs for developers, including API clients and testing tools.
Open-source API development ecosystem for building, testing, and managing APIs
Fake REST API with zero coding
Protocol Buffers for structured data serialization
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