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

# Checkly

> Send Checkly-related spans to Checkly via the OpenTelemetry Destination, using a Route Processor to filter the correct traces.

## Description

[Checkly](https://www.checklyhq.com/) enables you to quickly test, monitor, and observe your apps and APIs using Playwright and OpenTelemetry in a single workflow.

## Configuration

You can send data to a Checkly using the [OpenTelemetry](/telemetry-pipelines/mezmo-opentelemetry-destination) Destination.

### Configuration Options

<Note>
  You will also need to provide the access key for your Checkly instance.
</Note>

| Option             | Description                                                                      |
| ------------------ | -------------------------------------------------------------------------------- |
| Collector Endpoint | [`https://otel.eu-west-1.checklyhq.com/`](https://otel.eu-west-1.checklyhq.com/) |

### Route Processor Configuration

Because Checkly only accepts Checkly-related spans, you will need to configure a [Route Processor](/telemetry-pipelines/route-processor) to send those spans to your destination.  Use this conditional statement to route the spans to the destination.

```bash theme={null}
if trace_state: checkly=true

```