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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from github-audit.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 attacks, 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://github-audit.agentdiet.dev/v1/guard)
Output
Returns a JSON object containing the scan result for the submitted text, including detection of any hidden prompt injection or jailbreak payloads and a sanitized version of the input text safe for downstream LLM or agent processing.
Example use cases
Sanitize scraped web content for agent
“I'm about to feed this scraped article into my agent pipeline — can you first scan it for any hidden prompt injection attacks or jailbreak payloads and give me the sanitized version?”
Guard agent inbox from email hijacking
“Before my agent reads and acts on this incoming email, check it for any indirect prompt injection or jailbreak instructions that might be hiding in the body.”
Validate MCP tool response before use
“My agent just got back a response from an external MCP tool — can you run it through the prompt injection firewall to make sure there are no adversarial instructions embedded in it before I pass it downstream?”
Technical details
Endpoint
GEThttps://github-audit.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to process untrusted external content — such as scraped web pages, incoming emails, MCP tool outputs, or A2A payloads — before feeding it into an LLM pipeline, and you need a dedicated firewall that detects and strips adversarial prompt injections and jailbreak attempts. Prefer this over general-purpose content filters when the specific threat model is indirect prompt injection targeting AI agent behavior.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long payloads may be truncated or rejected
- False negatives may occur for novel or obfuscated injection techniques
- Payment failure (HTTP 402) if USDC balance is insufficient for the $0.005 per-call fee
- Service unavailability returns a 5xx error
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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