OpenViSTAI · Agents · Blockchain · Crypto
Submit a project
Menu
Developer Tools

Polar

Polar is a desktop development tool for creating and managing local Bitcoin regtest Lightning networks. It connects applications to local Lightning nodes through RPC and provides controls for nodes, channels, invoices, mining and regtest funds. It also supports Taproot Asset activity, network import and export, custom Docker nodes, and an MCP server for programmatic control of Lightning simulations.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Polar — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Polar when a Lightning application needs a local, controllable network for development or testing, particularly when testing node interactions, channels, invoices or Taproot Assets.

Who it is for

  • Lightning application developers who need local networks for development and testing.
  • Developers testing node, channel, invoice or Taproot Asset interactions.
  • Teams sharing local network configurations with other Lightning developers.
  • AI-agent developers interested in controlling Lightning simulations through Polar's MCP server.

Documented uses

  • Create one or more local regtest Lightning networks.
  • Connect an application to local Lightning nodes through RPC.
  • Add nodes, start or stop them, manage channels and test invoice flows.
  • Mine regtest blocks, deposit regtest coins and inspect node logs or terminals.
  • Test Taproot Asset issuance and transfer flows.
Before you choose

Requirements & limits

Polar is described as open source and MIT-licensed. The project README lists desktop downloads for Mac, Linux and Windows. Docker is required to create local networks; Docker Desktop on Linux is currently unsupported.

  • Docker is required for local network creation; Linux users need Docker Server rather than Docker Desktop.
  • Check the project's supported node-version list when matching Polar to an application environment.
  • Applications connect to local Lightning nodes through RPC.
  • Polar's MCP server is a distinct programmatic-control route, with installation instructions in the separate polar-mcp repository.
  • Custom nodes use Docker images.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Prepare Polar to create local networks

Install the documented Docker prerequisite and obtain the Polar desktop application.

Before you start

  • Docker: Docker Desktop on Mac or Windows, or Docker Server on Linux.
  • A Polar download for the operating system: Mac, Linux or Windows.

Steps

  1. Install the Docker option specified for your operating system.

  2. Download the Polar desktop package for your operating system from the project's GitHub releases.

  3. Open Polar; the project says it prompts users to install Docker if it cannot detect it automatically.

Expected outcome

The documented prerequisites and desktop application are in place for creating local networks in Polar.

Guide limitations

  • Docker is required to create local networks.
  • Docker Desktop on Linux is currently unsupported; the project directs Linux users to Docker Server.
  • This covers setup prerequisites, not the creation or operation of a network.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
13 October 2026
Original website title
jamaljsr/polar · Official homepage title · retained in its source language
How we review sourcesSuggest a correction