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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 2026-10-23).
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://sec-intel.agentdiet.dev/v1/llm-jailbreak-defense)
Output
Returns a structured object indicating whether prompt injection or jailbreak payloads were detected in the submitted text, along with sanitized version of the input safe for downstream LLM consumption.
Example use cases
Securing web-scraping agent pipeline
“I'm having my agent browse and summarize news articles, but I'm worried the pages might contain hidden prompt injections. Can you scan each page's text through the jailbreak firewall before the agent reads it?”
Screening inbound emails for LLM hijacking
“Before my email-processing agent reads and responds to this incoming customer email, scan it for any hidden prompt injection or jailbreak instructions embedded in the message body.”
Validating MCP tool responses in agentic workflow
“My agent just got a response back from an external MCP tool — can you run it through the prompt injection firewall to make sure it doesn't contain any adversarial instructions trying to override the agent's behavior?”
Technical details
Endpoint
POSThttps://sec-intel.agentdiet.dev/v1/llm-jailbreak-defense?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is processing untrusted external content — scraped web pages, emails, MCP tool responses, or A2A payloads — before feeding it into an LLM context. It is especially valuable in agentic pipelines where indirect prompt injection is a real attack surface. Prefer this over generic content filters when you specifically need LLM-targeted jailbreak and prompt injection detection rather than general spam or malware scanning.
Side effects
- Empty or missing 'text' field returns a 400 validation error
- Extremely large payloads may time out or be rejected
- Payment not provided results in HTTP 402 response requiring x402 micropayment
- False negatives possible for novel or highly obfuscated injection techniques
- Non-text binary content may not be correctly analyzed
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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