Pagerless for Python

Set up

pip install pagerless
export PAGERLESS_KEY=pl_live_...

import pagerless.auto

pagerless.init()
pagerless.capture(route="POST /checkout")
pagerless.event("Refunds paused", "tell")
pagerless.deploy("2026.10.22-2")

@pagerless.aws_lambda.handler
def handle(event, context): ...

logging.getLogger().addHandler(pagerless.logging.PagerlessHandler())

@pagerless.monitor("nightly-backup", pagerless.Schedule(cron="30 3 * * *"))
def backup(): ...

with pagerless.monitor("sync-prices", 3600):
    sync()

What it catches

• Uncaught exceptions in the main thread, other threads and unraisable ones (import pagerless.auto).
• Request rate, errors and latency per route with the Django, Flask or ASGI integrations.
• Celery task failures and missed beat runs (Celery).
• Lambda handler exceptions, flushed before return.
• ERROR log records, as the exception when there is one, else grouped by call site.

Python 3.9 or newer, standard library only. npx pagerless connect doesn't edit Python code yet; add these lines by hand.

Updated October 22, 2026.