Pagerless for OpenTelemetry

Set up

OTEL_EXPORTER_OTLP_ENDPOINT=https://events.pagerless.dev/v1/otlp
OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf
OTEL_EXPORTER_OTLP_HEADERS="Authorization=Bearer pl_live_..."
OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE=delta

http/json works too, and gzip. gRPC is not accepted; use OTLP over HTTP. More: OpenTelemetry docs.

What it catches

• Log records with severity ERROR or higher.
• Spans with an exception event, and SERVER spans that answered 5xx.
• HTTP server request-duration histograms (delta temporality), as request counts per route and status, so the 5xx floor works.

Updated October 22, 2026.