# PromptGuard (remote · api.promptguard.co)

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

- Trust score: 68/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `api.promptguard.co`: 68/100 (this document), [markdown](https://verifymcp.io/servers/co-promptguard-security/api.md), [page](https://verifymcp.io/servers/co-promptguard-security/api)
- npm · `@promptguard/mcp-server`: 34/100, [markdown](https://verifymcp.io/servers/co-promptguard-security/promptguard-mcp-server.md), [page](https://verifymcp.io/servers/co-promptguard-security/promptguard-mcp-server)
- oci · `ghcr.io/promptguardhq/promptguard-mcp-server`: 36/100, [markdown](https://verifymcp.io/servers/co-promptguard-security/ghcr-io-promptguardhq-promptguard-mcp-server.md), [page](https://verifymcp.io/servers/co-promptguard-security/ghcr-io-promptguardhq-promptguard-mcp-server)

## Channel facts

- Endpoint: `https://api.promptguard.co/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.2.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 45/100
  - 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 478 tokens (~95/item across 5 items; 4 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).
  - Supports UI / widget rendering.

**Unverified: 1 category.** A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the PromptGuard MCP server?

PromptGuard is a hosted endpoint at https://api.promptguard.co/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http co-promptguard-security 'https://api.promptguard.co/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "co-promptguard-security": {
      "url": "https://api.promptguard.co/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "co-promptguard-security": {
      "type": "http",
      "url": "https://api.promptguard.co/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.co-promptguard-security]
url = "https://api.promptguard.co/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "co-promptguard-security": {
      "type": "remote",
      "url": "https://api.promptguard.co/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add co-promptguard-security --url 'https://api.promptguard.co/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  co-promptguard-security:
    url: "https://api.promptguard.co/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "co-promptguard-security": {
      "Transport": "http",
      "Url": "https://api.promptguard.co/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add co-promptguard-security -t streamable-http -u 'https://api.promptguard.co/mcp'
```

### Other

```json
{
  "mcpServers": {
    "co-promptguard-security": {
      "type": "http",
      "url": "https://api.promptguard.co/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 68)

First indexed and scored.

## MCP tools (4)

### `promptguard_scan_text` (~129 tokens)

Scan text for threats

Scan text for security threats including prompt injection, jailbreaks, PII leakage, and toxic content. Returns a decision (allow/block), confidence score, threat type, and reason. Each call counts as one Request on your PromptGuard plan.
When to use: When reviewing user-facing prompts, testing LLM inputs for safety, or verifying that content is free of injection attacks before sending to an LLM.

Input parameters:

- `content_type` (string): Whether the text is a prompt sent to a model or a model's response
- `text` (string, required): The text content to scan for security threats

### `promptguard_scan_code` (~95 tokens)

Find LLM SDK calls in code

Analyze code for LLM SDK usage patterns (OpenAI, Anthropic, Cohere, Google Gemini, Bedrock). Detects import statements and client instantiations via pattern matching.
When to use: After generating new code that uses LLM SDKs, when reviewing pull requests, or when auditing a codebase for security coverage gaps.

Input parameters:

- `code` (string, required): The code content to analyze for LLM SDK usage

Output parameters:

- `kind`
- `providers` (array)
- `recommendation` (string)
- `summary` (string)
- `totalDetections` (integer)

### `promptguard_redact` (~140 tokens)

Redact PII

Redact PII (emails, phone numbers, SSNs, credit cards, API keys) from text. Returns sanitized text with each entity replaced by a labeled placeholder, e.g. [EMAIL_REDACTED], [PHONE_REDACTED], [SSN_REDACTED], and the PII types found. Never returns the original text. Each call counts as one Request on your PromptGuard plan.
When to use: Before including user data in LLM prompts, when processing customer messages, or when building RAG pipelines that ingest documents containing personal information.

Input parameters:

- `text` (string, required): The text content to redact PII from

### `promptguard_status` (~75 tokens)

PromptGuard status

Show whether PromptGuard is set up and signed in, with this server's version and the account or configuration details it knows (the hosted server reports your plan; the local CLI server reports its key type, proxy URL and providers).
When to use: To verify PromptGuard is properly configured, or to confirm which version is running.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/co-promptguard-security/api#diagnostics

## Score history

- 2026-11-05: 68

## Common questions

### 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 hosted endpoint (https://api.promptguard.co/mcp).

### Is the PromptGuard MCP server safe to use?

PromptGuard scores 68 out of 100 on VerifyMCP. 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.

### What tools does the PromptGuard MCP server expose?

PromptGuard exposes 4 tools: promptguard_scan_text, promptguard_scan_code, promptguard_redact, promptguard_status. Their descriptions and schemas cost roughly 439 tokens of context every time the server is loaded.

### Does the PromptGuard MCP server require authentication?

No. We connected to PromptGuard without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the PromptGuard MCP server still maintained?

PromptGuard is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.promptguard.co/mcp
- Changelog RSS feed: https://verifymcp.io/servers/co-promptguard-security/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/co-promptguard-security/api.json
- HTML version of this page: https://verifymcp.io/servers/co-promptguard-security/api