Best open-source API tools for the web, personal use

Open-source API clients and testing tools.

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AI & LLM tooling42Chat UIs10Agents & frameworks17Local inference3RAG & vector DBs5Coding assistants6Agent skills1MCP servers1Developer tools21Web frameworks4Databases & backends5Editors & IDEs1API tools1Self-hosted apps21Notes & docs8Automation3Data & analytics7Infra & DevOps5Security & identity7Communication6Media & photos15Design & creative16

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Hoppscotchhoppscotch/hoppscotch

Open-source API development ecosystemPersonalEnterpriseAPI toolsWebDocker / self-hostDesktop★ 81kMITcommit 4 days agolive demo

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