> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. # Server names > Specify custom names for servers using `x-fern-server-name` extension Specify custom names for servers: **`openrpc.yml`** ```yaml title="openrpc.yml" {3-4} servers: - name: production url: https://api.yourcompany.com/rpc x-fern-server-name: Production description: Production JSON-RPC server - name: staging url: https://staging-api.yourcompany.com/rpc x-fern-server-name: Staging description: Staging environment ``` > Specify custom names for servers using `x-fern-server-name` extension