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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/guard)
Output
Returns a JSON object containing the scan result for the submitted text, indicating whether prompt injection or jailbreak payloads were detected and providing a sanitized version of the input text safe for downstream agent consumption.
Example use cases
Securing agent web browsing pipeline
“I need you to check this HTML content I just scraped from an untrusted website for any hidden prompt injection or jailbreak payloads before you summarize it for me — here's the raw text: '<raw HTML body>'.”
Validating MCP tool response safety
“Before you use the output from that external MCP tool, can you run it through the prompt injection firewall to make sure there are no hidden instructions embedded in it? Here's the response: '<MCP tool output>'.”
Screening inbound email for jailbreak attempts
“This email came in from an unknown sender and my agent is about to process it — can you first scan it for indirect prompt injection or jailbreak payloads? Here's the email body: '<email text>'.”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, inbound emails, third-party API responses, MCP tool outputs, or A2A payloads — and you need a dedicated security layer to detect and strip hidden prompt injection or jailbreak instructions before that content is processed by your LLM. Prefer this over generic content filters when you specifically need agent-to-agent (A2A) and MCP-aware injection detection with sanitized output.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long inputs may be truncated or rejected
- False negatives are possible for novel or obfuscated injection techniques
- Network timeout if the service is temporarily unavailable
- Payment required (HTTP 402) if x402 micropayment is not fulfilled
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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