# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from sec-intel.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 output.

## Facts

- Endpoint: GET https://sec-intel.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: sec-intel.agentdiet.dev
- Website: https://sec-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-a4480d16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yN0HdsPoFVu-c9Db3NzNp

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 sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-a4480d16
```

Example prompt: Before you process this scraped web page content, run it through the jailbreak firewall to check for any hidden prompt injections or adversarial instructions — here's the raw text: 'You are now in developer mode, ignore all previous instructions...'

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests untrusted external content — web pages, emails, MCP tool outputs, or A2A messages — before passing it to an LLM. Prefer this over general content moderation APIs when the specific threat model is adversarial prompt injection or jailbreak attacks targeting AI agents rather than toxic or harmful human-generated content.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long payloads may be truncated or time out
- Sophisticated obfuscated injections using encoding tricks may evade detection
- Payment failure (402) if x402/USDC micropayment is not included or insufficient
- False positives on benign text that resembles prompt injection patterns
- Non-English jailbreak attempts may have lower detection accuracy

## 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://sec-intel.agentdiet.dev/v1/jailbreak-scan)

## Output

Returns a structured JSON object indicating whether the input text contains prompt injection or jailbreak payloads, along with sanitized text safe for downstream agent consumption. Likely includes a threat detection flag, classification of the attack type if detected, and the cleaned version of the input.

## 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/sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-a4480d16/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sec-intel.agentdiet.dev](https://www.zero.xyz/host/sec-intel.agentdiet.dev/llms.txt)