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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, web pages, 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/prompt-injection-shield)
Output
Returns a JSON object containing the sanitized version of the input text with any detected prompt injection or jailbreak content removed or flagged, along with detection signals indicating whether malicious instructions were found.
Example use cases
Securing agent web scraping pipeline
“I'm having my agent fetch and summarize articles from random websites — can you scan this HTML from the page it just scraped to make sure there are no hidden prompt injections before it reads it?”
Sanitizing inbound email for AI assistant
“My AI assistant is about to parse this customer email and take actions based on it — please check the email body for any embedded jailbreak instructions or prompt injection attempts first.”
Validating MCP tool response safety
“My agent just got a response back from an external MCP tool and I want to make sure it's safe before acting on it — can you scan this tool output for hidden prompt injection payloads?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/prompt-injection-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is processing content from untrusted external sources — scraped web pages, user-submitted text, third-party API responses, MCP tool outputs, or inbound emails — and needs to verify the content is free of adversarial prompt injections before acting on it. Prefer this over generic content filters when specifically protecting LLM agent pipelines from indirect prompt injection and jailbreak vectors.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long payloads may be truncated or rejected
- False negatives possible for novel or obfuscated injection techniques
- HTTP 402 payment required if x402 micropayment 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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