# 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 attacks, returning sanitized content.

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/jailbreak-scan?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-3e61ae3e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6jVOgUc1kiV7nNT9zUGBW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-3e61ae3e
```

Example prompt: Before you process that scraped web page, run it through the jailbreak firewall first — scan the raw HTML for any hidden prompt injections or jailbreak payloads and give me the sanitized version.

## When to prefer this

Choose this endpoint when your AI agent is about to process content from untrusted external sources — scraped web pages, user-submitted text, emails, third-party API responses, or MCP/A2A tool outputs — and you need a dedicated security layer to detect and strip adversarial prompt injections before they reach your LLM. Prefer this over generic content filters when the threat model is specifically indirect prompt injection and jailbreak attempts targeting agent behavior.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may be truncated or rejected
- Sophisticated steganographic injections may evade detection
- Non-text binary content may produce unreliable results
- Payment failure (HTTP 402) if x402 micropayment is not completed

## 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/jailbreak-scan)

## Output

Returns a structured object containing the scan result for the submitted text, including detection of any hidden prompt injection attempts, jailbreak payloads, or adversarial instructions, along with sanitized output safe for downstream LLM consumption.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "minLength": 1,
   "description": "Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-3e61ae3e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)