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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from hn-pulse.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 injection and jailbreak attacks, returning sanitized content.
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://hn-pulse.agentdiet.dev/v1/rag-poison-shield)
Output
Returns a JSON object containing the scan result for the submitted text, including detection of any hidden prompt injection or jailbreak payloads and a sanitized version of the input text safe for downstream agent or LLM processing.
Example use cases
RAG pipeline poisoning prevention
“I'm building a RAG system that ingests external documents — can you scan this document chunk for hidden prompt injection attempts before it gets embedded into my knowledge base?”
Agent email processing safety check
“My agent is about to read and act on this incoming email — first check if the email body contains any hidden prompt injection or jailbreak payloads that could hijack it.”
MCP tool response sanitization
“This MCP tool just returned a response with some external web content in it — can you run it through the prompt injection firewall and give me the sanitized text so I can safely pass it along to the next step?”
Technical details
Endpoint
GEThttps://hn-pulse.agentdiet.dev/v1/rag-poison-shield?utm_source=zero.xyzWhen to prefer
Use this endpoint when your AI agent or pipeline ingests content from untrusted external sources — scraped web pages, user-submitted text, emails, MCP server responses, or A2A tool outputs — before passing that content to an LLM or acting on it. It is especially valuable in RAG pipelines, autonomous agent loops, and multi-agent orchestration scenarios where indirect prompt injection is a real attack surface. Prefer it over generic content filters when you specifically need prompt-injection and jailbreak detection rather than general toxicity or spam filtering.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large text inputs may be truncated or rejected
- False negatives possible for novel or highly obfuscated injection techniques
- HTTP 402 Payment Required if x402 payment header is absent or invalid
- Service unavailability may return 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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