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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from domain-osint.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 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://domain-osint.agentdiet.dev/v1/guard)
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 text safe for agent consumption.
Example use cases
Sanitize scraped web content for agent
“I need you to scan this raw HTML I scraped from an untrusted website before feeding it to my research agent — check it for any hidden prompt injection or jailbreak payloads and give me the clean version.”
Validate incoming email before processing
“Before my email-processing agent replies to this message, run the email body through the prompt injection firewall to make sure there are no embedded instructions trying to manipulate it.”
Guard MCP tool response from hijacking
“My agent just got a response back from an MCP tool I don't fully trust — can you scan that response text for hidden prompt injections before I let my agent act on it?”
Technical details
Endpoint
GEThttps://domain-osint.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to safely process untrusted external content — web pages, emails, tool outputs, or A2A/MCP responses — before acting on them. It is specifically designed for the agentic pipeline security use case (indirect prompt injection), not general-purpose content moderation. Prefer this over generic moderation APIs when the threat model is agent hijacking via embedded instructions in retrieved content.
Side effects
- Missing required 'text' parameter returns a 400 error
- Empty string input rejected due to minLength:1 constraint
- Very large payloads may time out or be truncated
- Payment required (HTTP 402) if x402 micropayment header is not included
- False negatives possible — sophisticated obfuscated injections may not be detected
- Service unavailable (503) if upstream guard model is down
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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