Skip to content


OpenFaaS API Gateway / Portal

Conceptual design using the OpenFaaS operator faas-provider. Each function is built into an immutable Docker image before being deployed via the faas-cli, UI or REST API.

Click below to view the image full-size:

OpenFaaS Conceptual architecture

When deployed each function creates 1 to many Pods/containers depending on the minimum and maximum scaling parameters requested by the user. Functions can also scale to zero and back again through use of the faas-idler or the REST API.

See also: auto-scaling.

Reference documentation

You can find the reference documentation and any additional settings for the API gateway in the README file for the gateway:


The OpenFaaS API exposes a RESTful API which is documented with Swagger.

Explore or update the Swagger API documentation

The swagger.yml file can be viewed and edited in the Swagger UI.

  • Head over to the Swagger editor

  • Now click File -> Import URL

  • Type in and click OK

You can now view and edit the Swagger, copy back to your fork before pushing changes.