Cloudflare Workers OpenTelemetry

Send logs and traces in 5 minutes

Export OpenTelemetry logs and traces from your Cloudflare Workers to Better Stack. Cloudflare's built-in Workers observability sends them for you, so no instrumentation code is required.

Create a source

Create an OpenTelemetry source and keep the tab open. You'll need its Ingesting host and Source token.

Add two Cloudflare destinations

In the Cloudflare dashboard, go to Workers & Pages → Observability → Telemetry and click Add destination once for traces and once for logs:

Destination name: betterstack-traces
Destination type: Traces
OTLP endpoint: https://$INGESTING_HOST/v1/traces
Custom header: "Authorization" with value "Bearer $SOURCE_TOKEN"

Destination name: betterstack-logs
Destination type: Logs
OTLP endpoint: https://$INGESTING_HOST/v1/logs
Custom header: "Authorization" with value "Bearer $SOURCE_TOKEN"

Enable observability in your Worker

Add the observability block to your wrangler.jsonc. The destinations names must match the destinations you just created:

{
  "observability": {
    "traces": { "enabled": true, "destinations": ["betterstack-traces"], "head_sampling_rate": 1.0, "persist": false },
    "logs":   { "enabled": true, "destinations": ["betterstack-logs"],   "head_sampling_rate": 1.0, "persist": false }
  }
}

Deploy your Worker

npx wrangler deploy

View your logs and traces

Open Better Stack → Live tail. Your first traces and logs arrive within a minute or two. Send requests to your Worker to see a span per request, each with its console.log lines linked to the trace.

Need help?

Please let us know at hello@betterstack.com.
We're happy to help! 🙏