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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from json-repair.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://json-repair.agentdiet.dev/v1/prompt-injection-shield)
Output
Returns a sanitized version of the input text with hidden prompt injection and jailbreak payloads identified and neutralized, along with detection signals indicating whether adversarial content was found.
Example use cases
Guard agent from malicious web pages
“I'm about to feed this scraped web page into my agent pipeline — can you scan it for hidden prompt injections or adversarial instructions before I use it?”
Screen MCP tool response for attacks
“This MCP server just returned a response and I'm not sure I trust it — can you check it for any embedded jailbreak payloads or indirect prompt injection before my agent acts on it?”
Filter incoming email for injection attempts
“I have an email body that my AI assistant is going to summarize and act on — please scan it first to make sure there are no hidden prompt injection instructions or jailbreak tricks in the text.”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/prompt-injection-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent is processing untrusted external content — scraped web pages, emails, MCP/A2A tool responses — and needs to ensure no hidden prompt injection or jailbreak instructions are embedded before the content is acted upon. Ideal for agentic pipelines where intermediate tool outputs flow into LLM prompts without human review.
Side effects
- Empty or missing 'text' parameter returns validation error
- Extremely long text inputs may be truncated or rejected
- Sophisticated obfuscated injections may evade detection
- Rate limiting or payment failure returns 402 HTTP status
- Non-UTF8 or binary input may cause parsing 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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