OpenLeash

The Open-SourceAgent Control Layer

๐Ÿงญ Manage and ๐Ÿš€ Boost your Agents with Visibility, Security, Cost and other Plugins.

โœ“Claude Codeโœ“Codexโœ“OpenCodeโœ“Geminiโœ“Copilotโœ“Cursorโœ“Windsurfโœ“Cline
Up and leashed in 30 seconds. ๐Ÿพ
Download for Mac v0.36๐Ÿงฉ Browse 9 plugins
or$curl -fsSL https://openleash.com/install.sh | sh
๏ฃฟ Mac๐ŸชŸ Windows SOON๐Ÿง Linux SOON๐Ÿ“ฑ iOS SOON๐Ÿค– Android SOONโ˜๏ธ Cloud๐Ÿณ Docker
๐Ÿ“œ MIT licensed๐Ÿงฉ 9 plugins๐Ÿ“ฆ 97 installs๐Ÿ›  Open-source core
@OpenLeash๐Ÿ’ฅblast-radius

Block destructive tool use before agents damage files, databases, or infrastructure.

โฌ‡ 14โค๏ธ 0SECURITY@OpenLeash๐Ÿคซdata-leakage-prevention

Mask secrets before agents send them.

โฌ‡ 14โค๏ธ 0SECURITY@OpenLeash๐Ÿ“กmcp-scanner

See every MCP server, tool, and call.

โฌ‡ 14โค๏ธ 0SECURITY@OpenLeashโœ‚๏ธtoken-saver

Trim noisy context before every model call.

โฌ‡ 10โค๏ธ 0COST@OpenLeash๐Ÿ“rules-enforcer

Watch agent conversations and pause when configured rules are violated.

โฌ‡ 15โค๏ธ 0SECURITY+Build your own plugin

~80 lines of TypeScript. Publish it to the open registry.

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For plugin authors ๐Ÿ› 

Write a hook on

Ship it Friday.

FIRES WHENA user prompt is about to be submitted to the model.
YOU CANInspect, block, mask, rewrite, compress, or log prompts before they leave.

12 events across prompts, tool calls, sessions, skills, and logs. We handle distribution, updates, and the leaderboard clout.

Read the 10-minute plugin tutorial โ†’
token-saver/index.ts
export async function run({ event, config, capabilities }) {
  const { json } = await capabilities.llm.evaluateJson({
    purpose: "token-saver", prompt });
  return modify({ prompt: json.compressed });
}

// same prompt, ~40% fewer tokens. your wallet says thanks.
Pricing ๐Ÿ’ธ

Simple, honest pricing.

Free for individuals bringing their own key. MIT licensed forever โ€” pay only when we run the evaluations for you.

PERSONAL

Personal ๐Ÿง‘โ€๐Ÿ’ป

Start personal โ†’

Good agents deserve good leashes.

Free for individuals ยท MIT licensed ยท self-host anywhere

Start free โ†’โญ Star on GitHub