Create a Heroku log session and fetch recent app logs via the Platform API
domain: api.heroku.com · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Get a Heroku OAuth token (or API key) and use it as `Authorization: Bearer <token>`.
Set headers: `Accept: application/vnd.heroku+json; version=3` and `Content-Type: application/json`.
POST https://api.heroku.com/apps/{app_id_or_name}/log-sessions with JSON body.
Optional body fields: `lines` (number of lines to stream at once), `source` (e.g. "app"), `tail` (true to keep streaming), `type` (process type like "web"), `dyno_name`.
The response contains a `logplex_url`; GET that URL (unauthenticated) to read the log stream.
Known gotchas
Log sessions are ephemeral — they stream Heroku's in-memory buffer and are gone after; use a log drain for retention/search.
Tail=false returns a bounded set of recent lines; tail=true keeps the connection open and streams.
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