Your app runs in thirty regions. You live in one. Polylane watches every region at once and investigates wherever an issue lands.
Polylane keeps your app healthy in every region at once, without a wall of dashboards.
Get started for freeEverything Polylane picks up.
Everything Polylane reads from your Fly.io organisation.
Fly App Machine Volume Certificate Secret Every region at once.
Apps, machines and volumes, together
Every app sits in the graph with its machines, volumes, certificates and secrets, next to whatever you run on other clouds. When a machine misbehaves, Polylane knows what it serves.
One picture across every region
Your machines run wherever your users are; your attention can't. Polylane sees the whole fleet at once, so a regression in one region stands out against the ones that are fine.
No alert rules to write
Polylane reads app and machine metrics and logs throughout the day and judges them against how each app normally behaves. No thresholds to tune.
History for a fleet that churns
Machines deploy, stop, start and move. Polylane keeps a record of every change, so when an app misbehaves right after one, the investigation starts there.
The most restrictive token wins
Fly connects with a read-only API token, the most restrictive type Fly offers, and that's all Polylane asks for. It's encrypted before it's stored and never reaches an agent.
Found in production, fixed in code
When the cause is a line of code, Polylane writes the fix on the repo behind the app, with the evidence attached.
These prompts already work. Copy one, swap your own service name in, and run it.
Give it to your coding agent and let it cook.
“List every deploy since Friday and flag the ones whose metrics moved afterwards.” 
“Find the risky configuration: public buckets, missing alarms, single points of failure.” 
“List every scheduled job across our clouds and when each one last succeeded.” Use Fly.io with any coding agent. Polylane connects them.
Connect your agent to Polylane once and it can query Fly.io alongside the rest of your stack.
Guides and fixes for Fly.io
- Error fix Fix “context deadline exceeded” in Docker and fly deploy What “context deadline exceeded” means in Docker and fly deploy, how to find the call that timed out, and the fixes for WireGuard, builders and daemons.
- Error fix Fix “error umounting /data: EBUSY” on Fly.io Machines Why Fly.io logs “error umounting /data: EBUSY: Device or resource busy” at shutdown, how to find what stopped the Machine, and how to keep it running.
Common questions.
Is Polylane an AI SRE for Fly.io?
It does that work; we call it self-operating software. Polylane keeps your apps and machines in every region in one graph, investigates what breaks and fixes it with your approval.
How does Polylane connect to my Fly.io account?
With a read-only API token from your Fly.io dashboard, the most restrictive type Fly offers. Paste it in and Polylane starts reading; the token is encrypted before it's stored.
What Fly.io resources does Polylane sync?
Apps, machines, volumes, certificates and secrets, each with its regions, connections and history in the graph. The full list is on this page.
Can Polylane change my Fly.io apps?
No. The token is read-only, and that's all Polylane asks for. Code fixes go to the repo behind the app for your review.
How does detection work without alert rules?
Polylane reads your metrics and logs throughout the day against how each app normally behaves, so regressions surface with no threshold set.
Does it work with my observability provider?
Yes: Datadog, Sentry, Honeycomb, Axiom, Grafana Cloud, Logfire, Better Stack and OpenStatus. Forward their alerts and Polylane triages each one.
What does it cost?
There's a free plan, and paid plans start at $80 a month. On Scale and above you can switch on pay-as-you-go beyond the included credits. Every limit is published at polylane.com/pricing.