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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from sec-intel.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injection and jailbreak attacks, returning sanitized output
Price / call$0.005
Success—
StatusUnknown
How this service works
Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. (Live x402 v2, IETF MPP & MCP endpoint at https://sec-intel.agentdiet.dev/v1/guard)
Output
Returns a sanitized version of the submitted text with hidden prompt injection and jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found.
Example use cases
Protecting agent from malicious web pages
“I need you to scan this webpage content for hidden prompt injections before you summarize it for me — it came from an untrusted site and I don't want any embedded instructions hijacking your behavior.”
Sanitizing email before LLM processing
“Can you run this email through the prompt injection firewall before you extract the action items from it? I got it from an unknown sender and I'm worried it might have hidden instructions.”
Guarding MCP tool response in agent pipeline
“Before you act on that MCP tool response, please send it through the jailbreak firewall first — I want to make sure there are no adversarial prompt payloads hidden in the returned data.”
Technical details
Endpoint
GEThttps://sec-intel.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web scraping, email processing, third-party API responses, or MCP tool outputs — and you need to sanitize that content before passing it to an LLM. It is specifically designed for the indirect prompt injection threat model where adversarial instructions are hidden inside seemingly benign content retrieved from the web or external tools. Prefer this over generic content filters when you need LLM-specific jailbreak and prompt injection detection rather than general malware or spam filtering.
Side effects
- Missing required 'text' parameter returns validation error
- Empty string input rejected due to minLength:1 constraint
- Very long payloads may time out or be truncated
- Novel or obfuscated injection techniques may evade detection
- Non-text binary content may produce unreliable results
- Payment required (HTTP 402) if x402 micropayment header not provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads |
Output
Schema · Response
{
"type": "object"
}Reviews
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