Struct RequestEvent 

pub struct RequestEvent {

    pub id: String,
    pub ts: i64,
    pub proxy: String,
    pub session_id: Option<String>,
    pub method: String,
    pub path: String,
    pub mcp_method: Option<String>,
    pub tool: Option<String>,
    pub status: u16,
    pub latency_us: u64,
    pub upstream_us: Option<u64>,
    pub request_size: Option<u64>,
    pub response_size: Option<u64>,
    pub error_code: Option<String>,
    pub error_msg: Option<String>,
    pub client_name: Option<String>,
    pub client_version: Option<String>,
    pub note: String,
}

An MCP request that flowed through the proxy.

Fields

id: String

Unique event ID (UUIDv4).

ts: i64

Unix milliseconds (UTC).

proxy: String

Proxy name (from config or derived from upstream URL).

session_id: Option<String>

MCP session ID (from mcp-session-id header).

method: String

HTTP method (POST, GET, DELETE).

path: String

Request path.

mcp_method: Option<String>

MCP JSON-RPC method (tools/call, resources/read, etc.).

tool: Option<String>

Tool name for tools/call requests.

status: u16

HTTP response status code.

latency_us: u64

Wall-clock latency: proxy received request → sent response (μs).

upstream_us: Option<u64>

Time spent waiting for upstream response (μs).

request_size: Option<u64>

Request payload size in bytes.

response_size: Option<u64>

Response payload size in bytes.

error_code: Option<String>

MCP JSON-RPC error code (e.g., “-32600”) if the response was an error.

error_msg: Option<String>

Error message (truncated to 512 chars).

client_name: Option<String>

Client name from session clientInfo.name (e.g., “claude-desktop”).

client_version: Option<String>

Client version from session clientInfo.version (e.g., “1.2.0”).

note: String

Classification note: “rewritten”, “passthrough”, “error”, “sse”, etc.

Trait Implementations

impl Clone for RequestEvent

fn clone(&self) -> RequestEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RequestEvent

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

Formats the value using the given formatter.

impl Serialize for RequestEvent

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.