Enum SseBackendConfig 

pub enum SseBackendConfig {
    Stdio {
        command: String,
        args: Option<Vec<String>>,
        env: Option<HashMap<String, String>>,
    },
    SseUrl {
        url: String,
        headers: Option<HashMap<String, String>>,
    },
    BackendBridge(Arc<dyn BackendBridge>),
}

Backend configuration for the MCP server

Defines how the proxy connects to the upstream MCP service.

Variants

Stdio

Connect to a local command via stdio

Fields

command: String

Command to execute (e.g., “npx”, “python”, etc.)

args: Option<Vec<String>>

Arguments for the command

env: Option<HashMap<String, String>>

Environment variables

SseUrl

Connect to a remote URL using SSE protocol

Fields

url: String

URL of the MCP SSE service

headers: Option<HashMap<String, String>>

Custom HTTP headers (including Authorization)

BackendBridge(Arc<dyn BackendBridge>)

Use a pre-connected backend via BackendBridge trait

The caller is responsible for establishing the backend connection and passing it as an Arc<dyn BackendBridge>. This enables protocol conversion (e.g., Streamable HTTP backend → SSE frontend) without this module depending on the specific backend implementation.

Trait Implementations

impl Clone for BackendConfig

fn clone(&self) -> BackendConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BackendConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.