PromptGuard
NPM · @PROMPTGUARD/MCP-SERVER · 2 COMPONENTS · SCANNED SEP 20
Scan prompts for injection attacks, redact PII, and audit LLM SDK usage from any MCP client
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency19
- Repository check failed: the declared repository URL returned HTTP 404. See how to fix → View diagnostics → Fail
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 27 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability0
- Schema quality not yet verified: this server's registry entry declares environment variables (an API key or similar) that our sandbox does not supply, so we have no schema to assess.Unverified
Stability & Change Management0
- Stability not yet verified: this server's registry entry declares environment variables (an API key or similar) that our sandbox does not supply, so we have no schema to compare.Unverified
Tool Coverage0
- Tool coverage not yet verified: this server's registry entry declares environment variables (an API key or similar) that our sandbox does not supply, so we have no tool definitions to assess.Unverified
Tool Safety0
- Tool safety not yet verified: this server's registry entry declares environment variables (an API key or similar) that our sandbox does not supply, so we have no tool text to scan.Unverified
Capabilities0
- Protocol version not yet verified: this server's registry entry declares environment variables (an API key or similar) that our sandbox does not supply, so we never saw its MCP handshake.Unverified
Unverified: 5 categories
Categories scored 0 because our sandbox run of this package has not given us the schema these checks need to read. That is a gap on our side rather than a finding about the package, and we only credit what we can confirm, so the score stands at 0 until the capture succeeds. We are working through the fleet, so this normally clears without any action from you. How we score packages →
How do I install the PromptGuard MCP server?
PromptGuard runs locally as an npm package, launched with npx -y @promptguard/mcp-server. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @promptguard/mcp-server
claude mcp add co-promptguard-security -- npx -y @promptguard/mcp-server
{
"mcpServers": {
"co-promptguard-security": {
"command": "npx",
"args": [
"-y",
"@promptguard/mcp-server"
]
}
}
} {
"servers": {
"co-promptguard-security": {
"command": "npx",
"args": [
"-y",
"@promptguard/mcp-server"
]
}
}
} codex mcp add co-promptguard-security -- npx -y @promptguard/mcp-server
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"co-promptguard-security": {
"type": "local",
"command": [
"npx",
"-y",
"@promptguard/mcp-server"
],
"enabled": true
}
}
} openclaw mcp add co-promptguard-security --command npx --arg -y --arg @promptguard/mcp-server
mcp_servers:
co-promptguard-security:
command: "npx"
args: ["-y", "@promptguard/mcp-server"] {
"McpServers": {
"co-promptguard-security": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@promptguard/mcp-server"
]
}
}
} assistant mcp add co-promptguard-security -t stdio -c npx -a -y @promptguard/mcp-server
{
"mcpServers": {
"co-promptguard-security": {
"command": "npx",
"args": [
"-y",
"@promptguard/mcp-server"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Aug 26 0
- Package version: 1.0.0 → 1.1.2 functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 2 Aug 26 0
- Malware scan: unverified → pass ▲ security
- 1 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- Malware scan: pass → unverified ▼ security
- 26 Jul 26 0
First indexed and scored.
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Analysed npm/@promptguard/mcp-server@1.1.2
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
Tools for package channels are captured by running the package in an isolated sandbox. The most recent sandbox run could not capture a tool list from this package.
What is the PromptGuard MCP server?
PromptGuard is an MCP server listed in the public MCP registry as co.promptguard/security. Scan prompts for injection attacks, redact PII, and audit LLM SDK usage from any MCP client. This page covers its npm package (@promptguard/mcp-server).
Is the PromptGuard MCP server safe to use?
PromptGuard scores 34 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
Is the PromptGuard MCP server still maintained?
PromptGuard is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the PromptGuard MCP server under?
PromptGuard declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.