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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from x402-audit.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://x402-audit.agentdiet.dev/v1/injection-guard)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected, along with sanitized text with malicious instructions stripped or flagged, allowing the agent to safely continue processing the input.
Example use cases
Guard agent from malicious web scrape
“I just scraped this article page and want to summarize it, but first check the raw HTML for any hidden prompt injection or jailbreak attempts before passing it to your summarizer.”
Sanitize inbound email before LLM processing
“Before you parse and reply to this customer email, run the message body through the prompt-injection firewall to make sure there are no hidden instructions trying to hijack your behavior.”
Validate MCP tool response safety
“My agent just got back a response from an external MCP tool — can you scan that payload for embedded prompt injections or jailbreak attempts before I let the agent act on it?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/injection-guard?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever an AI agent needs to process text from untrusted external sources — scraped web pages, inbound emails, third-party tool responses, or A2A/MCP payloads — before acting on them. It is the right choice when protecting LLM pipelines against indirect prompt injection, jailbreaks, or hidden instruction attacks embedded in content the agent did not generate itself.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely large payloads may be truncated or rejected
- False negatives possible for novel or obfuscated injection techniques
- Service unavailable or timeout if the x402 endpoint is unreachable
- Payment required (HTTP 402) if USDC balance is insufficient for the $0.005 per-call fee
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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