crss is an open-source API tool hosted on GitLab, designed for developers to integrate or build API-driven solutions. It is distributed under the MIT License and can be self-hosted or integrated into developer workflows. Suitable for technical users seeking customizable API infrastructure.
0xc4ff31n3 0xc4ff31n3 / crss is an API design, testing & docs product. Enabling developers to access or build API-driven functionality with open-source code. It is built as an open-source project for developers. 0xc4ff31n3 0xc4ff31n3 / crss is open source under the Open Source license. The product ships for API, and it can be self-hosted.
It is developed by 0xc4ff31n3, and the product first shipped in 2026. It exposes integrations via a public API.
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