Prompt Guard Mcp

io.github.robertoyanguas-opsPublished by GitHub account robertoyanguas-opsv1.1.1Updated Oct 24, 2026

Scans untrusted web pages, emails, or tool outputs for prompt injections and returns sanitized tex

The publisher's own server: X402-Broker Global A2A, MCP & x402 Super-Marketplace

VerifiedStreamable HTTPWeb executableSecurity & MonitoringAI & ML

Overview

AI-generated overview

A remote MCP server that scans untrusted text such as web pages, emails or tool outputs for hidden prompt injections and returns sanitized text.

What you can do
Scan untrusted web pages, emails, MCP responses or A2A payloads for hidden prompt injections and get sanitized text back, using deterministic prompt-guard analysis of the supplied text. Check an agent's account ledger: remaining free trial calls, prepaid USD balance, cumulative spend, total API calls and total LLM tokens saved.
When to use it
Useful when an assistant ingests content from outside sources and you want a deterministic check for hidden injection attempts before acting on it, and when you need to confirm remaining free calls or prepaid balance before a batch of paid tool executions or after a top-up.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. The manifest declares no authentication, but the tools refer to per-agent accounts, free trial calls and prepaid USD balance, so an agent account is implied.
Before you install
The service is metered: only a limited number of free trial calls are included, and further use draws on a prepaid USD balance topped up via Stripe or USDC, so calls can cost money. Text you submit is sent to a third-party remote service. Sanitized output is a filter, not a guarantee, so treat scanned content with care.

Installation

In SourceWeft

  1. Open Prompt Guard Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.robertoyanguas-ops%2Fprompt-guard-mcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "prompt-guard": {
      "type": "http",
      "url": "https://prompt-guard-72343955726.us-central1.run.app/mcp/prompt-guard"
    }
  }
}

Tools

2

scan_prompt_injection

Scan prompt injection

Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. WHEN TO USE: Call `scan_prompt_injection` when your task requires deterministic `prompt-guard` analysis for `text`; use `get_agent_wallet_status` to check your remaining free trial quota or prepaid balance. WHEN NOT TO USE: Do not use for unrelated domains or binary media. PARAMETER INTERACTIONS: Pass the target `text` as a non-empty string; omit `agent_id` and `tx_hash` during your 5 free trial calls, or supply `agent_id` (`agd_pass_...`) / `tx_hash` for paid execution. Read-only and idempotent; results are cached for 1 hour (<5ms cache hit). $0.005 per call. Pricing: the first 5 calls per agent_id are free and failed calls are never charged. After 5 calls, the tool returns a payment-required quote (not a fatal error) with a $2 Stripe top-up link and Base/Solana USDC addresses; complete payment, then retry with your agd_pass_ key in agent_id or pass tx_hash. Example: scan_prompt_injection(text='example')

Parameterstextrequiredtx_hashagent_id

get_agent_wallet_status

Get agent wallet status

Inspect an agent's account ledger: remaining free trial calls (out of 5), prepaid USD balance, cumulative spend, total API calls, and total LLM tokens saved. WHEN TO USE: Call before a batch of paid tool executions or after completing a Stripe or USDC top-up to confirm your balance. WHEN NOT TO USE: Do not use to process web content, execute marketplace tools, or submit payments; use the other tools on this server for execution. PARAMETER INTERACTIONS: Omit agent_id to inspect the default trial account derived from your client IP, or pass your explicit agent_id or agd_pass_ session key to check a specific funded wallet. Free and read-only: never charges a fee or consumes a free trial call. Example: get_agent_wallet_status(agent_id='example')

Parametersagent_id

Version history

2
  1. v1.1.1LatestOct 13, 2026
  2. v1.0.0Oct 13, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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