Add a log drain to a Heroku app to forward logs to an external service
domain: api.heroku.com · 4 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Set up an endpoint that can receive logs (syslog server or HTTPS POST endpoint).
POST https://api.heroku.com/apps/{app_id_or_name}/log-drains with body {"url": "..."} and headers `Accept: application/vnd.heroku+json; version=3`, `Authorization: Bearer <token>`.
For HTTPS drains, configure your web service to handle POSTs; Heroku sends each log line.
Verify with `heroku drains -a <app>` or GET the app's log-drains.
Known gotchas
Syslog and HTTPS drains are only on the Cedar generation; the Fir generation uses telemetry (OTLP) drains instead — see heroku telemetry commands.
HTTPS drains support HTTP Basic Auth for security; TLS failures (expired/self-signed certs) make the drain go quiet — check with `heroku logs -t`.
Drains created by add-ons can't be removed manually; remove with `heroku drains:remove <url>` for your own.
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