# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from workflows.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://workflows.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: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-aeb0a54a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_auSG5lL_lirHWr4SqP9bS

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 workflows-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-aeb0a54a
```

Example prompt: Before you process this scraped webpage, run it through the jailbreak firewall to check for any hidden prompt injections or jailbreak payloads — here's the raw HTML: '<html>...untrusted content...</html>'

## When to prefer this

Choose this endpoint when your AI agent or pipeline needs to process text from untrusted external sources — web pages, emails, third-party API responses, or MCP/A2A tool outputs — and you need real-time protection against indirect prompt injection and jailbreak attacks before the content reaches your LLM. Prefer this over generic content filters when the threat model is specifically adversarial manipulation of AI agent behavior.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely long payloads may be truncated or rejected
- Obfuscated or novel injection techniques may evade detection
- Payment required (HTTP 402) if x402 micropayment header is not included
- False positives on legitimate content that resembles injection syntax

## 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://workflows.agentdiet.dev/v1/jailbreak-scan)

## Output

Returns a JSON object indicating whether prompt injection or jailbreak content was detected in the input text, along with a sanitized version of the content safe for downstream LLM or agent processing.

## 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/workflows-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-aeb0a54a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)