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MCPBouncer
Desktop Action Firewall & Inspector for Claude & Cursor MCP
MCPBouncer is a desktop action firewall & live packet inspector for AI IDEs (Cursor & Claude) using MCP. It intercepts local AI tool calls to prevent data destruction and credential leaks: β’ π Live Inspector: Desktop UI showing every tool call in real time. β’ π¨ Human Approval: Destructive commands (rm -rf, DROP TABLE) pause for instant [ALLOW/BLOCK]. β’ π DLP: Automatically scrubs OpenAI, AWS & Stripe keys. β’ π Local SHA-256 tamper-evident audit trail. β’ 100% offline & private.
Hi Product Hunt! π
I built MCPBouncer because giving autonomous AI coding assistants (Cursor, Claude Desktop) direct execution access to local databases, terminals, and file systems creates a massive security blindspot.
One hallucinated `rm -rf /` or `DROP TABLE`, or an API key leaked via prompt injection, can be devastating.
MCPBouncer solves this with a zero-dependency, local desktop firewall:
β’ π Real-time packet inspector dashboard (`http://127.0.0.1:4114`)
β’ π¨ Instant Human-in-the-Loop approval for destructive operations
β’ π Automatic DLP secret scrubbing (OpenAI, AWS, GitHub, Stripe)
β’ π¦ Prompt injection & Unicode steganography shield
β’ π Immutable SHA-256 local audit ledger
β’ 100% offline & private
I'd love to get your feedback and answer any questions!
About MCPBouncer on Product Hunt
βDesktop Action Firewall & Inspector for Claude & Cursor MCPβ
MCPBouncer was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #29 on the daily leaderboard. MCPBouncer is a desktop action firewall & live packet inspector for AI IDEs (Cursor & Claude) using MCP. It intercepts local AI tool calls to prevent data destruction and credential leaks: β’ π Live Inspector: Desktop UI showing every tool call in real time. β’ π¨ Human Approval: Destructive commands (rm -rf, DROP TABLE) pause for instant [ALLOW/BLOCK]. β’ π DLP: Automatically scrubs OpenAI, AWS & Stripe keys. β’ π Local SHA-256 tamper-evident audit trail. β’ 100% offline & private.
On the analytics side, MCPBouncer competes within Open Source, Developer Tools, Artificial Intelligence and GitHub β topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how MCPBouncer performed against the three products that launched closest to it on the same day.
Who hunted MCPBouncer?
MCPBouncer was hunted by Cipher Sanchez. A βhunterβ on Product Hunt is the community member who submits a product to the platform β 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.
For a complete overview of MCPBouncer including community comment highlights and product details, visit the product overview.
Cipher Sanchez