> ## Documentation Index
> Fetch the complete documentation index at: https://docs.appsignal.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Additional OpenTelemetry instrumentations

<Note>
  🛟 Don't hesitate to [contact us](mailto:support@appsignal.com) if you run into
  any issues while implementing custom instrumentations. We're here to help!
</Note>

In addition to the already included instrumentations, you can also add custom ones as long as they comply with the structure of an OpenTelemetry automatic instrumentation.

## Setup

Using the [`additionalInstrumentations`](/nodejs/3.x/configuration/options#option-additionalinstrumentations) config option you can add additional instrumentations that will create spans and send them to AppSignal.

Below is an example of how to use `additionalInstrumentations` in your application:

<CodeGroup>
  ```javascript Node.js theme={null}
  const {
    CustomInstrumentation,
  } = require("opentelemetry-custom-instrumentation");

  new Appsignal({
    active: true,
    name: "<YOUR APPLICATION NAME>",
    pushApiKey: "<YOUR API KEY>",
    additionalInstrumentations: [
      new CustomInstrumentation({
        // instrumentation config here
      }),
    ],
  });
  ```
</CodeGroup>