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Fusio

fusio-project.org

Free plan WebLinuxAPISelf-hosted
Visit fusio-project.org
Spec score 8.0 #8 of 28 in Rest Apis

What it is

Fusio is an open-source API management platform for connecting business logic and infrastructure to APIs. It is self-hosted and brings databases, microservices, and custom scripts behind a unified gateway that handles routing, authentication, and request validation. TypeSchema models add validation and generate OpenAPI specifications and client SDKs in multiple languages. A developer portal provides documentation, testing tools, and API keys; API monetization features can manage plans, quotas, subscriptions, and billing. AI-assisted development and AI/MCP integration are described as optional. Official adapters cover services and technologies such as AWS, Google Cloud, GraphQL, LDAP, MongoDB, Redis, SQL, Stripe, and SOAP. Worker runtimes are available for PHP, JavaScript, and Python, with SDKs listed for C#, Go, Java, JavaScript, PHP, and Python. Fusio also documents lifecycle management, access policies, and API analytics. Install options include a release archive, Composer, or Docker. The code is licensed under Apache 2.0. Fusio is available for free.

Spec sheet

Purpose
Fusio is an open-source API management platform for connecting business logic and infrastructure to APIs.Read 9 Oct 2026 · fusio-project.org
Integrations
Official adapters connect with services and technologies including AWS, Google Cloud, GraphQL, HTTP, LDAP, MongoDB, Redis, SQL, Stripe, and SOAP.Read 9 Oct 2026 · fusio-project.org
Support
The project offers real-time Discord support and architectural discussions, plus an issue tracker for bugs and feature requests.Read 9 Oct 2026 · fusio-project.org
License
The Fusio site states that its code is licensed under Apache 2.0.Read 9 Oct 2026 · fusio-project.org
Headquarters
Heiligenhaus, GermanyRead 28 Sep 2026 · fusio-project.org
AI and MCP
The site describes AI-assisted development and AI/MCP integration, and says AI features are optional.Read 9 Oct 2026 · fusio-project.org
Developer portal
The platform includes a developer portal with documentation, testing tools, and API keys.Read 9 Oct 2026 · fusio-project.org
Execution languages
Fusio offers worker runtimes for PHP, JavaScript, and Python.Read 9 Oct 2026 · fusio-project.org
Gateway
Its unified API gateway connects databases, microservices, and custom scripts while handling routing, authentication, and request validation.Read 9 Oct 2026 · docs.fusio-project.org
Installation options
Fusio can be installed from a release archive, through Composer, or with Docker.Read 9 Oct 2026 · fusio-project.org
Monetization
Fusio can manage plans, quotas, subscriptions, and billing through its API monetization features.Read 9 Oct 2026 · fusio-project.org
Schema automation
TypeSchema models provide validation and automatic OpenAPI specifications and multi-language client SDK generation.Read 9 Oct 2026 · docs.fusio-project.org
SDKs
The developer hub lists SDKs for C#, Go, Java, JavaScript, PHP, and Python.Read 9 Oct 2026 · fusio-project.org
Security controls
The platform documentation describes authentication, granular rate limiting, and request validation as built-in API management capabilities.Read 9 Oct 2026 · docs.fusio-project.org
Self-hosted
Fusio describes itself as self-hosted API management for builders.Read 9 Oct 2026 · docs.fusio-project.org

Plans and prices

Fusio Free Open-source API management platform · Apache 2.0 code license Read 9 Oct 2026 · fusio-project.org

Every Fusio plan and price →

Strong points and limits

Strong points

  • Self-hosted API management platform
  • Gateway includes routing and request validation
  • TypeSchema generates OpenAPI specifications and SDKs
  • Includes developer portal and API monetization
  • Free, with Apache 2.0 code license

Limits

  • Requires a self-hosted deployment
  • AI features are optional

Who it suits

Fusio suits teams that want to manage APIs on self-hosted infrastructure, with gateway controls, developer tools, and optional monetization features. Its documented runtimes and SDKs cover several programming languages.

Verdict

Fusio combines API gateway management, schema automation, a developer portal, and monetization features in a self-hosted platform. It is free, with installation options including Docker, Composer, and a release archive.

Where Specifiction places it

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