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Free Public API Lab
Free API playground with REST, OData, FHIR, SOAP & Socket.IO—no signup needed
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Free Public API Lab is a no-account, no-setup API playground supporting REST, OData, MCP, FHIR, SOAP, and Socket.IO protocols. Works seamlessly with Postman, Insomnia, Bruno, and custom code for testing and development.
The service includes a curated open-source version available on GitHub for local installation and deployment. Built as a playground for an upcoming product, it offers a fully functional environment for API experimentation and integration.
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