Configure Your Servers
Default Behavior
The OpenAPI specification allows you to define an array of servers that can be used to make requests to the API. These servers are generally used to define different environments (for example, production, development, and testing) available for the API.
openapi: 3.0.3info: title: Example version: 0.0.1servers: - url: https://prod.example.com # Used as the default URL by the SDK description: Our production environment - url: https://sandbox.example.com description: Our sandbox environment
The Speakeasy SDK Generator automatically selects the first server URL from the OpenAPI document's servers list as the default endpoint. While this default is commonly set to the production server, it's flexible to accommodate your application's development cycle by reordering or modifying the server list.
Declare Base Server URL
Speakeasy SDKs are battery-included, meaning they are designed to work out of the box with minimal configuration from end users.
If your OpenAPI document lacks server definitions (both at the global level and for individual operations) or relies on relative paths for server URLs, it's essential to set a default server endpoint. Set the default server endpoint by specifying a baseServerUrl
in your SDK Generator configuration file (gen.yaml
). This ensures your SDK always has a primary server to connect to for its operations.
# ...generation: baseServerUrl: "https://prod.example.com"
Use Templated URLs
Templated (opens in a new tab) URLs provide a dynamic method to customize server endpoints based on runtime parameters, making them ideal for applications that serve multiple clients or operate in varied environments.
-servers: url: https://{customer}.yourdomain.com variables: customer: default: api description: The name of the customer sending API requests.
These placeholders can then be replaced with specific values at runtime, allowing for customer-specific or environment-specific configurations without altering the SDK.
NOTE
Please note that the templating feature is only supported for global server URLs and is not yet supported for per-operation server URLs.
Managing Multiple Servers With IDs
For a better developer experience, you can define an ID for each server using the x-speakeasy-server-id
extension. This simplifies the process of selecting between servers at SDK initialization.
openapi: 3.0.3info: title: Example version: 0.0.1servers: - url: https://prod.example.com # Used as the default URL by the SDK description: Our production environment x-speakeasy-server-id: prod - url: https://sandbox.example.com description: Our sandbox environment x-speakeasy-server-id: sandbox
Dynamic Server Declaration at Runtime
Dynamic server selection allows developers to switch between multiple predefined servers at runtime, offering flexibility across different deployment environments or client configurations.
NOTE
The Speakeasy README file accompanying your generated SDK will include SDK-specific examples to guide you through the process of dynamically selecting servers.
Methods
Server Selection by Index
Specify a server from the predefined list based on its index.
s := sdk.New( sdk.WithServerIndex(1))
Global URL Override
Set a global server URL at SDK initialization, overriding the base URL.
s := sdk.New( // if the x-speakeasy-server-id extension is not used sdk.WithServerURL("https://sandbox.example.com") // with x-speakeasy-server-id extension sdk.WithServer("sandbox"),)
Per-Client or Per-Operation Override
Override the server URL for specific instances or API calls.
res, err := s.Tag1.ListTest1( ctx, operationSecurity, sdk.WithServerURL("https://sandbox.example.com"), page, headerParam1, queryParam1,)
CAUTION
If you choose to configure the SDK URL at runtime and relative paths were used
in the OpenAPI document, make sure that you account for the baseURL
when
initializing the SDK server configuration.