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AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall MCP Server

answering

AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall is answering right now. Last checked 14 min ago. It exposes 2 tools. Last commit 17 Oct 2026.

Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections an.

Uptime history 7 days of history
7 days agonow
100.0%
Uptime 24h
91 of 91 checks
2
Tools
read from the server
414 ms
Response time
average over 24h
0
Stars
last commit 17 Oct 2026

Nothing serious here today

Today is the operative word: we check AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

run in your terminal
claude mcp add prompt-guard --transport http https://prompt-guard.agentdiet.dev/mcp
Settings → Connectors → Add custom connector, then paste this address
https://prompt-guard.agentdiet.dev/mcp
~/.codex/config.toml
[mcp_servers.prompt-guard]
url = "https://prompt-guard.agentdiet.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "prompt-guard": {
      "url": "https://prompt-guard.agentdiet.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "prompt-guard": {
      "type": "http",
      "url": "https://prompt-guard.agentdiet.dev/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

agent
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')
scan
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')

Endpoints

URLTransportStateLatencyChecked
https://prompt-guard.agentdiet.dev/mcp streamable-http answering 315 ms 14 min ago

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AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall — questions

Answers built from our own checks of this server.

What can AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall do?
It exposes 2 tools, read directly from the server on our last check. Among them: get_agent_wallet_status, scan_prompt_injection. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 414 ms. The bar chart above shows every period we have measured.
How do I connect AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall need an API key?
No. AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall?
It answers our handshake in 414 ms on average, which is faster than 34% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall open source?
The code is open source: it is published under the MIT licence, written in Python, 0 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at prompt-guard.agentdiet.dev, which runs on its operator's own terms.