# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from sec-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 content.

## Facts

- Endpoint: GET https://sec-intel.agentdiet.dev/v1/tool-poisoning-shield?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: sec-intel.agentdiet.dev
- Website: https://sec-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-8b0dd07d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3K7xoBc0e4IwPwFk8dLc_

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 sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-8b0dd07d
```

Example prompt: Before you summarize that webpage content, run it through the prompt-injection firewall first — scan this HTML for any hidden jailbreak instructions or adversarial prompt injections and give me the sanitized version.

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests untrusted external content — web pages, emails, tool outputs, or A2A payloads — and you need to detect and strip adversarial prompt injections before processing. Prefer this over generic content filters when the specific threat model is LLM prompt hijacking or jailbreak via indirect injection.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may time out or be truncated
- False negatives possible for novel or obfuscated injection techniques
- Non-text binary content may not be parsed correctly
- HTTP 402 returned if payment credentials are missing or insufficient

## 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://sec-intel.agentdiet.dev/v1/tool-poisoning-shield)

## Output

Returns an object indicating whether prompt injection or jailbreak content was detected in the input text, along with a sanitized version of the text with malicious instructions removed or neutralized.

## 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/sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-8b0dd07d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sec-intel.agentdiet.dev](https://www.zero.xyz/host/sec-intel.agentdiet.dev/llms.txt)