Fusio

Fusio is an open source API management platform for developers who need to turn business logic into a documented, secured and monetizable API. It exposes an existing SQL or NoSQL database as REST endpoints, acts as a gateway in front of microservices, and ships a developer portal with self service documentation, testing tools and key management. The platform is built from a small set of concepts. An Operation maps an HTTP method and path to an Action while enforcing data integrity through Schemas. An Action holds the business logic and can run custom code in PHP, JavaScript or Python. A Connection defines how to reach a database, a remote HTTP API or an AI agent, and resolves into a configured client. Events, Cronjobs and Triggers cover webhooks, scheduled batch work and event driven execution. Release 7.0 is positioned around AI: internal agents help generate actions, schemas and configuration inside the backend, while external agents let your own users build tools from your API operations as functions a language model can call, with validation and an auth layer so a model never bypasses security. Analytics and monitoring track usage, performance and errors in real time, subscription billing covers plans and quotas, and client SDKs are generated automatically in several languages. Fusio publishes no price list. The project is open source and distributed through its public repository for self hosting, and the site offers a live demo rather than a paid tier. No commercial plans, hosted edition or support contracts are advertised.