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PromptGuard

Official registry Developer tools

Scan prompts for injection attacks, redact PII, and audit LLM SDK usage from any MCP client

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @promptguard/mcp-server
Claude Code 
claude mcp add promptguard -e 'PROMPTGUARD_API_KEY=<your promptguard_api_key>' -- npx -y @promptguard/mcp-server@1.1.2
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "promptguard": {
            "command": "npx",
            "args": [
                "-y",
                "@promptguard/mcp-server@1.1.2"
            ],
            "env": {
                "PROMPTGUARD_API_KEY": "<your promptguard_api_key>"
            }
        }
    }
}

Environment variables

  • PROMPTGUARD_API_KEY secret PromptGuard API key (starts with pg_live_)
OCI package docker.io/abhijoysarkar/promptguard-mcp-server:1.1.2
Claude Code 
claude mcp add promptguard -e 'PROMPTGUARD_API_KEY=<your promptguard_api_key>' -- docker run -i --rm docker.io/abhijoysarkar/promptguard-mcp-server:1.1.2
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "promptguard": {
            "command": "docker",
            "args": [
                "run",
                "-i",
                "--rm",
                "docker.io/abhijoysarkar/promptguard-mcp-server:1.1.2"
            ],
            "env": {
                "PROMPTGUARD_API_KEY": "<your promptguard_api_key>"
            }
        }
    }
}

Environment variables

  • PROMPTGUARD_API_KEY secret PromptGuard API key (starts with pg_live_)

Frequently asked questions

What is PromptGuard?

Scan prompts for injection attacks, redact PII, and audit LLM SDK usage from any MCP client

How do I install PromptGuard?

It runs on your machine. In Claude Code: claude mcp add promptguard -e 'PROMPTGUARD_API_KEY=<your promptguard_api_key>' -- npx -y @promptguard/mcp-server@1.1.2. For other clients, paste the JSON configuration from this page into their MCP settings.

Does PromptGuard need an API key?

Yes. It expects PROMPTGUARD_API_KEY, which you set in its configuration.

Is PromptGuard open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains PromptGuard?

It is published by acebot712. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.