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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from llms-generator.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://llms-generator.agentdiet.dev/v1/guard)
Output
Returns a JSON object indicating whether the input text contains prompt injection or jailbreak payloads, along with sanitized text with malicious instructions removed or flagged, allowing the agent to safely consume external content.
Example use cases
Guarding agent from malicious web scrape
“I just scraped this article to feed into my agent pipeline — can you scan it for any hidden prompt injection instructions before we process it? Here's the raw HTML text.”
Sanitizing email before LLM summarization
“Before you summarize this email from an unknown sender, run it through the injection firewall — I want to make sure there are no embedded jailbreak instructions trying to hijack your behavior.”
Validating MCP tool response safety
“My agent just got a response back from an external MCP tool — can you check that response text for any hidden prompt injections or jailbreak payloads before I let the agent act on it?”
Technical details
Endpoint
GEThttps://llms-generator.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to safely consume untrusted external content — web pages, emails, MCP tool responses, or A2A payloads — before processing or acting on it. It is specifically designed for agent-to-agent and MCP pipeline security scenarios where indirect prompt injection is a risk, making it preferable over generic content filters that are not LLM-attack-aware.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long payloads may exceed query parameter limits when passed via GET
- Ambiguous or novel injection patterns may not be detected if not covered by current detection rules
- HTTP 402 payment required if x402 payment header is missing or insufficient
- Service unavailability returns 5xx errors
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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