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Warden
Sandbox your MCP servers. Control every permission.
Warden is an open-source sandbox runtime for MCP servers. Define explicit filesystem, network, and environment permissions, then run the server inside an enforced sandbox where anything outside the policy is blocked. Warden is designed to make MCP execution safer by default, with a fail-closed approach when the required sandbox cannot be initialized.
Hey Product Hunt!
I built Warden because MCP servers can be incredibly useful, but giving a server your normal system permissions can be a pretty big trust boundary.
Warden takes a different approach: define what the server is allowed to access, put it inside a sandbox, and block everything outside that policy.
I’m especially interested in testing Warden against MCP servers I didn’t write myself.
If you work with MCP, security, or AI agents, I’d love for you to try it and tell me where it breaks, what you’d change, or what you’d want Warden to support next.
Open source, built to be tested.
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About Warden on Product Hunt
“Sandbox your MCP servers. Control every permission.”
Warden was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #118 on the daily leaderboard. Warden is an open-source sandbox runtime for MCP servers. Define explicit filesystem, network, and environment permissions, then run the server inside an enforced sandbox where anything outside the policy is blocked. Warden is designed to make MCP execution safer by default, with a fail-closed approach when the required sandbox cannot be initialized.
Warden was featured in Open Source (68.9k followers), Developer Tools (519.8k followers), GitHub (41.4k followers) and Security (2.9k followers) on Product Hunt. Together, these topics include over 135.9k products, making this a competitive space to launch in.
Who hunted Warden?
Warden was hunted by Abdullah Bilal. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Abdullah Bilal