Connectum API Reference / @connectum/otel / client-interceptor / createOtelClientInterceptor

Function: createOtelClientInterceptor()

createOtelClientInterceptor(options): Interceptor

Defined in: client-interceptor.ts:67

Creates a ConnectRPC interceptor that instruments outgoing RPC calls with OpenTelemetry tracing and/or metrics.

The interceptor follows OpenTelemetry semantic conventions for RPC:

• Creates client spans with standard RPC attributes
• Injects trace context into outgoing request headers for propagation
• Records call duration, request size, and response size metrics
• Handles both unary and streaming calls

Parameters

options

OtelClientInterceptorOptions

Configuration options for the client interceptor

Returns

Interceptor

A ConnectRPC Interceptor function

Example

import { createOtelClientInterceptor } from '@connectum/otel';
import { createConnectTransport } from '@connectrpc/connect-node';

const transport = createConnectTransport({
    baseUrl: 'http://localhost:5000',
    interceptors: [createOtelClientInterceptor({
        serverAddress: 'localhost',
        serverPort: 5000,
        filter: ({ service }) => !service.includes("Health"),
    })],
});