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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 2026-10-21).
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://onchain-risk.agentdiet.dev/v1/mcp-injection-firewall)
Output
Returns a JSON object containing the scan result for the submitted text, including whether prompt injection or jailbreak content was detected and a sanitized version of the input text safe for downstream AI processing.
Example use cases
Guard agent from malicious web content
“I'm about to feed this scraped webpage into my AI research agent — can you first scan it for any hidden prompt injections or adversarial instructions embedded in the HTML so we don't get hijacked?”
Sanitize incoming email before LLM processing
“Before my email-assistant agent reads and summarizes this incoming email, please run the text through the injection firewall to make sure there are no embedded jailbreak instructions trying to manipulate it.”
Validate MCP tool response before pipeline use
“My agent just got back a response from an external MCP tool — can you scan that response text for any indirect prompt injection payloads before I let it influence the next step in the workflow?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/mcp-injection-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, MCP/A2A tool responses — and you need to sanitize that content before it influences agent behavior. Especially valuable in agentic pipelines where indirect prompt injection via external data is a live attack vector. Prefer this over generic content filters when you specifically need prompt-injection and jailbreak detection rather than spam or malware scanning.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long text inputs may be truncated or rejected
- Payment failure (HTTP 402) if x402 USDC payment is not provided
- Network timeout if the endpoint is temporarily unavailable
- False negatives: novel or obfuscated injection techniques may not be detected
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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