Struct Request 

pub struct Request {
    pub jsonrpc: String,
    pub id: Option<Value>,
    pub method: String,
    pub params: Value,
}

JSON-RPC 2.0 request envelope.

One Request corresponds to a single line on the stdio transport under MCP’s 2025-06-18 protocol revision.

Fields

jsonrpc: String

JSON-RPC version marker. Must be the string "2.0".

id: Option<Value>

Correlation identifier. Absent for notifications; present for method calls that expect a paired Response.

method: String

Fully-qualified method name (e.g. "tools/list").

params: Value

Method parameters. Shape is method-specific; unused methods receive Value::Null after deserialisation.

Trait Implementations

impl Debug for Request

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Request

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.