MCP Defender
An AI app security tool that acts as a secure proxy between AI applications and MCP servers, scanning all MCP tool calls in real-time to block malicious activity.
An AI app security tool that acts as a secure proxy between AI applications and MCP servers, scanning all MCP tool calls in real-time to block malicious activity.
Starting price
From $29.99
Best for
Safety
Free trial
✓ Free tier
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MCP Defender is a practical fit for buyers evaluating Safety, AI model, and #AI Security tools.
- What is MCP Defender?
- An AI app security tool that acts as a secure proxy between AI applications and MCP servers, scanning all MCP tool calls in real-time to block malicious activity.
- Who is it for?
- Security engineers at AI-forward companies who need to monitor MCP tool-call traffic across developer endpoints; better than generic EDR for MCP-specific threats because it understands tool-call semantics and signatures.
- Pricing
- free
Product information
What this product does
MCP Defender is an AI firewall for monitoring and protecting MCP communications. It intercepts tool calls and responses, and verifies them against security signatures. MCP Defender provides advanced LLM-driven malicious activity detection and allows users to manage signatures used during scans Target Users: MCP Defender is suitable for users who need to protect their AI applications from malicious activities. It provides intelligent threat detection through real-time communication analysis to reliably secure user data. Use Cases: Enterprise AI application protectionData security for research institutionsSecure communication needs for AI developersFeaturesAI firewall for monitoring and protecting MCP communicationsIntercept and validate tool calls and responses using security signaturesAdvanced LLM-based malicious activity detectionManage signatures used during scansAutomatically scan and protect all MCP tool callsHow to UseDownload and install the MCP Defender desktop client.Launch the application and set up the required security parameters.MCP Defender will automatically intercept and verify all MCP communications.View scanning activities and detected malicious activity results.Manage signatures used during scans as needed.
Sourced from mcpdefender.com
Works With
Platforms
- Web
- iOS
Problem Solved
What problem does MCP Defender solve?
It's for developers and security-conscious teams running AI apps like Cursor, Claude, VS Code, and Windsurf that connect to MCP servers. Today those MCP tool calls can carry prompt injection, tool poisoning, credential theft, or command injection, and there's no built-in layer watching the traffic. MCP Defender sits between the AI app and the MCP server, analyzing every communication in real-time and alerting or blocking when it spots malicious activity. For example, if a poisoned MCP tool tries to read your SSH keys, MCP Defender flags and blocks the call before credentials leave your machine.
Company & Maker
Who built MCP Defender?
- Company
- MCP Defender Inc. (mcpdefender.com)
- Product
- An AI app security tool that acts as a secure proxy between AI applications and MCP servers, scanning all MCP tool calls in real-time to block malicious activity.
- HQ
- San Francisco
- Team size
- 2-10
- Live since
- Apr 2025
- Founders
- Saurabh Davala
Some facts above are based on publicly available information and may have changed.
The maker hasn't published a public statement we can verify yet.
Researched with AI · Data refreshed 15 hours ago · How we score
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MCP Defender is an AI firewall that sits between AI coding apps (Cursor, Claude, VS Code, Windsurf) and MCP servers, intercepting tool calls and responses to detect and block prompt injection, tool poisoning, credential theft, and command injection. It is used by developers and security-conscious teams who run MCP-connected AI apps and want a local protective layer.
Who should use
Buyer-fit is derived from approved personas and use-case evidence. Search-volume noise stays labeled separately.
Best-fit workflows
- Enterprise AI application protectionData security for research institutionsSecure communication needs for AI developers
- Blocks a poisoned MCP tool that attempts to read ~/.ssh/id_rsa before the credential leaves the machine.
- Alerts on prompt-injection payloads embedded in MCP tool responses returned to Cursor or Claude Desktop.
- Scans and validates every MCP tool call and response against deterministic signatures plus an LLM classifier.
- Generates a local log of flagged MCP activity for developer review and signature tuning.
- Lets teams bring their own LLM provider and API keys to run detection without sending data to a vendor cloud.
Pricing reality
Vendor stated
Pricing page found with 16 price points detected; open source under AGPL-3.0.
Actual cost
Likely a free/open-source core with paid tiers or support; exact tier boundaries and per-seat vs per-endpoint model are not clearly documented in public signals.
Hidden costs
3 hidden cost warnings — unlock to view
Pricing reality
Verified Oct 2026 / Vendor pricing evidence only
Starting price
From $29.99
Free tier available.
Mindber only shows named plan cards when they come from linked pricing evidence. If the tier data is incomplete, this page falls back to the verified starting price instead of fabricating plan names or $0 tiers.
BASIC
per user per month
$29.99
- All free plan features and...
- Mainline AI
- Unlimited teams
What pricing pages often hide
True cost for your case
LIVE ESTIMATEEstimated spend
$90Recurring billing is usually the real cost driver, not the first-month sticker price.
Compare this product in-line
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Engagement signals (30d)
Based on 6 linked public signals.
Mindber Activity Score™
Score locked
HOW THIS TOOL SCORES
Scores compare this tool with similar tools similar tools in Safety. Use it to judge Innovation and Capability before you shortlist.
Innovation Index™
Is it new, different, and easy to understand?
Functionality Score™
Does it cover the jobs buyers expect, and can it keep up?
Low confidence (40%) - some sub-scores have thin evidence.What this means →
Data sources
Traffic & search proof
Public view keeps the ratio story. Paid view unlocks exact monthly visits, full region coverage, and CPC-level keyword intelligence.
Google Trends live interest
Live Google Trends data for MCP Defender: interest over time, regions, topics, and related queries.
Tracks 12-month Google search interest on a 0-100 relative interest scale.
Includes regional demand, so readers can see where search interest is strongest.
Includes related topics and related queries to surface adjacent demand and search intent.
FAQ
Only linked Q and A rows are shown. Empty FAQ data stays hidden.
Social mentions
Only linked public mention evidence is shown here.
Sources and methodology
Only evidence with a linked source record or explicit feature provenance is shown here. Data without provenance stays off the page.
COMMUNITY CREDITS
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