The internet has plenty of lists of MCP servers — thousands of scraped repos, ranked by GitHub stars, install-at-your-own-risk. AgentStack is the opposite bet: curated, reviewed, and built so both you and your agent can rely on what you install. Three things make it different.
A free directory ranks thousands of repos by GitHub stars and ships you whatever is popular. AgentStack scans every version before it lists — for prompt injection, secret exfiltration, and dangerous tool calls — and publishes the report. Stars measure attention. We measure whether it is safe to hand your agent.
How the review works →Directories list your work for free and leave you to monetize somewhere else. AgentStack is a real marketplace: price your listing one-time, by subscription, or per call — keep 70%, paid out monthly via Stripe Connect. The buyer gets a license key and a one-command install; you get revenue and live analytics.
Sell on AgentStack →Most catalogs are human-only web pages. AgentStack is legible to the agent itself: a one-command CLI, a discovery MCP that lets an agent search and install on its own, machine-readable pages, and llms.txt for AI answer engines. As agents start doing their own tool discovery, the marketplace they can actually read wins.
Agent discovery →Free directories aggregate and rank open-source repos by popularity. AgentStack curates and security-reviews every version before it lists, lets creators actually sell their work (keeping 70%), and is built to be discovered and installed by agents themselves — not just browsed by humans.
You are not paying for access to open source — that stays free, and plenty of free listings live on AgentStack. You are paying for reviewed, supported, often hosted software with one-command install and a license, from creators who are incentivized to maintain it because they get paid.
Yes. Point an agent at the AgentStack discovery MCP and it gets search_listings, get_listing, and how_to_install tools — it can find a capability it is missing and install it, all from security-reviewed listings.