# A2A Indirect Prompt-Injection & Jailbreak Firewall

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

## Facts

- Endpoint: GET https://shopify-intel.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: shopify-intel.agentdiet.dev
- Website: https://shopify-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-4fea8808
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c2Ceobo6c6yca4cjMfAOT

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-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-4fea8808
```

Example prompt: Before processing this scraped webpage content into your context, scan it for any hidden prompt injections or jailbreak attempts and give me the sanitized version: '<html>...untrusted content here...</html>'

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, user-submitted text, emails, third-party MCP tool responses, or A2A agent payloads — and you need to sanitize that content before it enters your LLM context window. Prefer this over general-purpose content filters when you specifically need prompt-injection and jailbreak detection tailored to agentic workflows, MCP, and A2A protocols.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long payloads may hit size limits or timeout
- False negatives: sophisticated obfuscated injections may not be detected
- Payment required (HTTP 402) if x402 micropayment is not provided
- Ambiguous content may produce over-aggressive sanitization removing benign text

## 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-intel.agentdiet.dev/v1/indirect-injection-guard)

## Output

Returns a JSON object containing the sanitized version of the input text with hidden prompt injections and jailbreak payloads removed, along with detection signals indicating whether malicious content was found and what was stripped.

## 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-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-4fea8808/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-intel.agentdiet.dev](https://www.zero.xyz/host/shopify-intel.agentdiet.dev/llms.txt)