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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from onchain-risk.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 text.
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://onchain-risk.agentdiet.dev/v1/workflows/rag-context-sanitizer)
Output
Returns a sanitized version of the input text with hidden prompt injection and jailbreak payloads removed or neutralized, along with detection metadata indicating whether adversarial content was found.
Example use cases
Sanitize scraped web content for RAG
“I just scraped a bunch of web pages to use as context for our agent — can you scan each one for hidden prompt injections and give me the cleaned text before we index it?”
Screen incoming email for jailbreak payloads
“Before my email-reading agent processes this message from an unknown sender, check it for any hidden prompt injection or jailbreak instructions and strip them out.”
Validate MCP tool response before execution
“My agent just got back a response from an external MCP tool and I'm not sure I trust it — can you run it through the prompt injection firewall to make sure it's not trying to override my agent's instructions?”
Technical details
Endpoint
POSThttps://onchain-risk.agentdiet.dev/v1/workflows/rag-context-sanitizer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent pipeline ingests untrusted external content — scraped web pages, emails, MCP tool responses, A2A messages, or RAG context — and you need to detect and strip hidden prompt injections or jailbreak instructions before they reach your LLM. It is especially valuable in autonomous agent workflows where adversarial third-party content could hijack agent behavior.
Side effects
- Empty or missing 'text' field returns a 400 validation error
- Payloads that are extremely long may be truncated or rejected
- Ambiguous injection patterns may produce false positives, over-sanitizing legitimate content
- Service may return 402 Payment Required if USDC payment is not attached or insufficient
- Network timeouts if the scanning model is under load
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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