# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from cve-intel.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).

Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized content.

## Facts

- Endpoint: POST https://cve-intel.agentdiet.dev/v1/workflows/rag-context-sanitizer?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: cve-intel.agentdiet.dev
- Website: https://cve-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/cve-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f5e24cef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pm0PpOPcdsPSCTdlUxjQ2

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 cve-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f5e24cef -d '<json body>'
```

Example prompt: Before you use this scraped web page as context, can you run it through the prompt-injection firewall to check for hidden instructions or jailbreak payloads and give me back the sanitized version?

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests untrusted external content — web scrapes, emails, third-party API responses, MCP tool outputs, or A2A payloads — and you need a dedicated security layer to detect and neutralize hidden prompt injections or jailbreak instructions before that content reaches your LLM. Prefer this over generic text-processing endpoints when LLM safety and adversarial robustness are the primary concern.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- Extremely large payloads may be rejected or truncated
- Network timeout on slow upstream connections
- Payment failure (HTTP 402) if x402 USDC balance is insufficient
- Ambiguous or heavily obfuscated injections may not be detected with full confidence

## 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://cve-intel.agentdiet.dev/v1/workflows/rag-context-sanitizer)

## Output

Returns a JSON object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads neutralized or flagged, enabling safe downstream use by AI agents.

## 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/cve-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f5e24cef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cve-intel.agentdiet.dev](https://www.zero.xyz/host/cve-intel.agentdiet.dev/llms.txt)