# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from token-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 injection and jailbreak attacks, returning sanitized output.

## Facts

- Endpoint: GET https://token-intel.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: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-fbe49143
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rR7dOiNXB7BiztPPAGx4t

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 token-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-fbe49143
```

Example prompt: Before you process this web page I just scraped, can you run it through the jailbreak firewall to check for any hidden prompt injections or adversarial instructions embedded in the text?

## When to prefer this

Choose this endpoint when your AI agent needs to safely process untrusted external content — such as scraped web pages, user-submitted text, third-party API responses, MCP tool outputs, or A2A payloads — before passing them into an LLM context. It is especially valuable in agentic pipelines where indirect prompt injection is a real attack surface. Prefer this over general-purpose content moderation APIs when the threat model is specifically adversarial LLM manipulation rather than hate speech or NSFW content.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Very long payloads may hit query string length limits since text is passed as a GET query parameter
- Ambiguous or novel injection techniques may not be detected (false negatives)
- Non-English or heavily encoded payloads may reduce detection accuracy
- Payment required error (402) if USDC micropayment is not provided

## 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://token-intel.agentdiet.dev/v1/jailbreak-scan)

## Output

Returns a structured object indicating whether the input text contains prompt injection or jailbreak payloads, along with sanitized text safe for the agent to process.

## 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/token-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-fbe49143/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)