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redocly-cli/docs/rules/no-empty-servers.md
2023-11-17 09:45:03 +00:00

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no-empty-servers

Requires the servers list is defined in your API.

OAS Compatibility
2.0
3.0
3.1
flowchart TD

root ==> ServersList

style ServersList fill:#codaf9,stroke:#0044d4,stroke-width:5px

API design principles

An empty servers list defaults to localhost, which is not practical for your API consumers. An API cannot be used without a server. Define servers so that the Try it and code sample generator features in OpenAPI tools (including Redocly) can produce functional API requests.

If you don't have a server because the consumer is responsible for setting up their own server, you can still describe the server with server variables. The following code sample shows declaration of a server variable.

servers:
  - url: 'https://{tenant}/api/v1'
    variables:
      tenant:
        default: api.example.com
        description: Your server host

Configuration

Option Type Description
severity string Possible values: off, warn, error. Default error (in recommended configuration).

An example configuration:

rules:
  no-empty-servers: error

Examples

Given this configuration:

rules:
  no-empty-servers: error

Example of incorrect empty servers:

server: []

Example of correct servers:

servers:
  - url: https://development.gigantic-server.com/v1
    description: Development server

Resources