Enum McpTransport 

pub enum McpTransport {
    Stdio {
        command: String,
        args: Vec<String>,
        env: HashMap<String, String>,
        cwd: Option<PathBuf>,
    },
    Http {
        url: String,
        headers: HashMap<String, String>,
    },
    Sse {
        url: String,
        headers: HashMap<String, String>,
    },
}

Canonical in-crate representation of an MCP server’s transport.

This is the single source of truth for “stdio vs http vs sse”, shared by both the mcp.json config path (McpServerEntry) and the CLI-flag path (TransportArgs converts into this via TryFrom).

Examples

use mcp_execution_cli::commands::common::McpTransport;
use std::collections::HashMap;

let transport = McpTransport::Http {
    url: "https://api.example.com/mcp".to_string(),
    headers: HashMap::new(),
};
assert!(matches!(transport, McpTransport::Http { .. }));

Debug output redacts header/env values (keeping keys), args wholesale, and URL userinfo/query strings, mirroring mcp_execution_core::ServerConfig:

use mcp_execution_cli::commands::common::McpTransport;
use std::collections::HashMap;

let transport = McpTransport::Http {
    url: "https://api.example.com/mcp".to_string(),
    headers: HashMap::from([("Authorization".to_string(), "Bearer sk-secret".to_string())]),
};

let debug_output = format!("{transport:?}");
assert!(debug_output.contains("Authorization"));
assert!(!debug_output.contains("sk-secret"));

Variants

Stdio

Stdio transport: spawn a subprocess and speak MCP over stdin/stdout.

Fields

command: String

Command to execute (binary name or absolute path).

args: Vec<String>

Arguments to pass to the command.

env: HashMap<String, String>

Environment variables for the server process.

cwd: Option<PathBuf>

Working directory for the server process.

Http

Streamable HTTP transport.

Fields

url: String

Server endpoint URL.

headers: HashMap<String, String>

HTTP headers sent with every request (e.g. Authorization).

Sse

Server-Sent Events transport.

Fields

url: String

Server endpoint URL.

headers: HashMap<String, String>

HTTP headers sent with every request (e.g. Authorization).

Trait Implementations

impl Clone for McpTransport

fn clone(&self) -> McpTransport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpTransport

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

Formats the value using the given formatter.

impl TryFrom<TransportArgs> for McpTransport

type Error = Error

The type returned in the event of a conversion error.

fn try_from(args: TransportArgs) -> Result<Self>

Performs the conversion.