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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/prompt-shield)
Output
Returns a JSON object containing the scan result for the submitted text, including detection of any prompt injection or jailbreak payloads and a sanitized version of the input safe for further LLM processing.
Example use cases
Safe web scraping for agent pipeline
“I'm about to feed this scraped HTML from an external website into my AI pipeline — can you first scan it for any hidden prompt injections or jailbreak instructions so my agent doesn't get hijacked?”
Email body screening before LLM processing
“This email came in from an unknown sender and I want to pass it to my agent for summarization — please check the email body for embedded prompt injection attacks before my LLM sees it.”
MCP tool response safety check
“My agent just got back a response from an external MCP tool and I'm worried it might contain adversarial instructions — scan the payload for any jailbreak or prompt injection content and give me the sanitized version.”
Technical details
Endpoint
GEThttps://domain-osint.agentdiet.dev/v1/prompt-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests untrusted external content — scraped web pages, emails, MCP tool responses, or A2A payloads — and you need a dedicated, low-latency firewall to detect and sanitize indirect prompt injection or jailbreak attempts before the content reaches your LLM. Especially valuable in agentic workflows where external tools or web content can be weaponized to hijack agent behavior.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long input may be truncated or rejected
- False negatives possible for novel or obfuscated injection patterns not yet in the detection model
- HTTP 402 returned if payment is not provided or insufficient
- Service unavailable (503) during downtime affecting the live endpoint
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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