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![ycombinator Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::113130846.png) Y Combinator [@ycombinator](/creator/twitter/ycombinator) on x 1.5M followers
Created: 2025-07-14 15:00:34 UTC

.@gen_analysis' MCP Guard is the first runtime firewall designed to secure every MCP tool call against prompt injection attacks.

It's a free, open-source tool designed to validate, restrict, and log every MCP tool call.

MCP Guard sits between your agents and MCP servers, screening all inputs and outputs, blocking known jailbreak patterns and obfuscated payloads before execution.



![](https://pbs.twimg.com/amplify_video_thumb/1944760844925214720/img/uvXGkPzBfmWGrO2J.jpg)

XXXXXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1944774024778924378/c:line.svg)

**Related Topics**
[log](/topic/log)
[mcp](/topic/mcp)
[y combinator](/topic/y-combinator)

[Post Link](https://x.com/ycombinator/status/1944774024778924378)

[GUEST ACCESS MODE: Data is scrambled or limited to provide examples. Make requests using your API key to unlock full data. Check https://lunarcrush.ai/auth for authentication information.]

ycombinator Avatar Y Combinator @ycombinator on x 1.5M followers Created: 2025-07-14 15:00:34 UTC

.@gen_analysis' MCP Guard is the first runtime firewall designed to secure every MCP tool call against prompt injection attacks.

It's a free, open-source tool designed to validate, restrict, and log every MCP tool call.

MCP Guard sits between your agents and MCP servers, screening all inputs and outputs, blocking known jailbreak patterns and obfuscated payloads before execution.

XXXXXX engagements

Engagements Line Chart

Related Topics log mcp y combinator

Post Link

post/tweet::1944774024778924378
/post/tweet::1944774024778924378