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flyctl

flyctl is the command-line tool used to interact with Fly.io, enabling deployment, management, and orchestration of applications on the Fly.io platform using Machines as the underlying building blocks.
Latest: 10
Last checked: Jun 9, 2026 12:10am
Rank: 159/15140
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Overview

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License: Apache-2.0Winget: Available

Version & Lifecycle

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Current: 10 N-2: 0.4.50 Avg cadence: Every 1 day

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

Community Notes

Deployment tip • December 31, 2025
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flyctl Windows install and CI authentication note

For managed Windows or build-agent deployments, use Fly.io’s documented PowerShell installer for flyctl: pwsh -Command "iwr https://fly.io/install.ps1 -useb | iex". If newer PowerShell is not installed, Fly.io documents that powershell can be used instead, but standardize on one shell in packaging so PATH and execution-policy behavior are predictable.

For non-interactive deployments and CI/CD runners, keep authentication out of the package and inject FLY_API_TOKEN from the deployment system’s secret store before running commands such as flyctl deploy --remote-only. After installation, validate with flyctl version rather than testing only for a downloaded ZIP or installer cache.

Source: official Fly.io flyctl installation documentation.

Release Notes & Updates

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Avg cadence:
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Also known as

Other names people use for this app — helps search and matching.

flyctlfly-io flyctl

Notes

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flyctl uses API calls to orchestrate Fly.io services and supports configuration via fly.toml files. It is a 'fat client' exposing internal deployment details. Documentation and usage examples are available on Fly.io's official site.