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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from shopify-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 injections and jailbreak attempts, 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://shopify-intel.agentdiet.dev/v1/llm-guard)
Output
Returns a JSON object containing the scan result, including whether a prompt injection or jailbreak attempt was detected and a sanitized version of the input text with any adversarial content removed or neutralized.
Example use cases
Guarding agent from malicious web pages
“I'm about to feed this webpage's content into my AI pipeline — can you scan it for any hidden prompt injection or jailbreak instructions first and return the sanitized text?”
Filtering untrusted email before LLM processing
“Before my agent reads this incoming email to extract action items, can you check it for embedded jailbreak payloads or indirect prompt injections and clean it up?”
Sanitizing MCP tool response before acting on it
“My agent just got a response back from an external MCP tool — can you run it through the prompt-injection firewall to make sure there are no adversarial instructions hidden in the output before I let the agent act on it?”
Technical details
Endpoint
GEThttps://shopify-intel.agentdiet.dev/v1/llm-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests untrusted external content — such as scraped web pages, user-submitted emails, external API responses, or MCP/A2A tool outputs — before passing that content to an LLM, to prevent indirect prompt injection and jailbreak attacks from hijacking agent behavior.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Very large payloads may time out or be truncated
- Sophisticated obfuscated injections may evade detection (false negatives)
- Non-text binary content may not be properly parsed
- Payment failure (402) if x402 USDC balance is insufficient
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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