# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from shopify-spy.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://shopify-spy.agentdiet.dev/v1/rag-poison-shield?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: shopify-spy.agentdiet.dev
- Website: https://shopify-spy.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-spy-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-9fc451f8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P3ZLnBiQSVMS_eKSvig-F

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 shopify-spy-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-9fc451f8
```

Example prompt: Before you summarize this scraped webpage content, run it through the prompt-injection firewall first to check for any hidden jailbreak instructions or injection attacks embedded in the HTML.

## When to prefer this

Use this endpoint whenever your agent pipeline ingests untrusted external content — scraped web pages, emails, MCP/A2A tool responses, or RAG documents — and needs to verify that content is free of hidden prompt injection or jailbreak payloads before passing it to an LLM. Prefer this over manual filtering when you need automated, real-time defense at the agent boundary.

## Known failure modes

- Empty or missing 'text' parameter returns validation error
- Very long inputs may be truncated or rejected
- Novel or obfuscated injection techniques may evade detection
- Non-text binary content may not be parseable
- Service unavailable or payment required (HTTP 402) if quota exceeded

## 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://shopify-spy.agentdiet.dev/v1/rag-poison-shield)

## Output

Returns a structured object containing the sanitized version of the input text with prompt injection and jailbreak payloads neutralized, along with detection signals indicating whether malicious content was found and what type of attack was identified.

## 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/shopify-spy-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-9fc451f8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-spy.agentdiet.dev](https://www.zero.xyz/host/shopify-spy.agentdiet.dev/llms.txt)