# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from llms-generator.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 injections and jailbreak attempts, returning sanitized output.

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/indirect-injection-guard?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-6277b8d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WbHxYUVpEOaaCrXuzJlpP

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 llms-generator-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-6277b8d5
```

Example prompt: Before you process this scraped web page content, run it through the indirect injection firewall to check for hidden prompt injection or jailbreak instructions and give me the sanitized version: '<html>...page content here...</html>'

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, third-party API responses, MCP tool outputs, A2A payloads, or user-submitted emails — before passing that content to an LLM. It is specifically designed for agentic security contexts (A2A, MCP, IETF MPP) and supports x402 micropayment at $0.005/call, making it ideal for high-volume automated pipelines that need cost-effective prompt injection screening.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Very long payloads may hit size limits or timeout
- Highly obfuscated injections (e.g. base64-encoded, steganographic) may evade detection
- Payment failure via x402 returns a 402 Payment Required response
- False positives on legitimate instruction-like text in benign documents
- Service unavailability returns a 5xx error

## 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://llms-generator.agentdiet.dev/v1/indirect-injection-guard)

## Output

Returns a JSON object containing the scan result, including whether a prompt injection or jailbreak payload was detected, the sanitized version of the input text with malicious instructions removed or neutralized, and potentially a risk assessment or confidence score.

## 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/llms-generator-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-6277b8d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)