# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from whale-momentum.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://whale-momentum.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: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f7df5d26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Mkyr95ya6RgJvpQyoK5i9

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 whale-momentum-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f7df5d26
```

Example prompt: Before you process this scraped webpage content, run it through the jailbreak firewall to check for hidden prompt injections and give me the sanitized version: '[raw HTML or text here]'

## When to prefer this

Use this endpoint when your AI agent pipeline processes any untrusted external content — web scrapes, emails, tool responses, or A2A payloads — before passing it to an LLM or downstream agent. Prefer this over general content moderation APIs when your specific concern is indirect prompt injection and jailbreak attacks targeting AI agents rather than human-facing content policy violations.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Very long text inputs may time out or be truncated
- Highly obfuscated or novel injection techniques may not be detected (false negatives)
- Payment required (HTTP 402) if x402 USDC balance is insufficient
- False positives may flag legitimate security-related text as malicious

## 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://whale-momentum.agentdiet.dev/v1/jailbreak-scan)

## Output

Returns a structured JSON object indicating whether prompt injection or jailbreak payloads were detected in the input, along with a sanitized version of the text with malicious directives removed or flagged

## 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/whale-momentum-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f7df5d26/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)