# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from company-enrich.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://company-enrich.agentdiet.dev/v1/guard?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: company-enrich.agentdiet.dev
- Website: https://company-enrich.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/company-enrich-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-90291d00
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o3fWhxl7LTofi8v3CuMnH

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 company-enrich-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-90291d00
```

Example prompt: Before my agent processes this scraped webpage content, can you scan it for any hidden prompt injections or jailbreak instructions and give me the sanitized version? Here's the text: [paste untrusted content]

## When to prefer this

Choose this endpoint when your AI agent needs to process content from untrusted external sources — scraped web pages, third-party API responses, user emails, MCP tool outputs, or A2A payloads — before feeding them into an LLM. It is purpose-built for the indirect prompt injection threat model specific to agentic AI pipelines, making it more appropriate than generic content moderation APIs when the threat is adversarial AI instruction hijacking rather than toxic language.

## Known failure modes

- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long text inputs may be truncated or rejected
- False negatives on novel or obfuscated injection techniques not yet in detection patterns
- Payment failure via x402 results in 402 response before scan is performed
- Non-UTF8 or binary content may cause parsing errors

## 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://company-enrich.agentdiet.dev/v1/guard)

## Output

Returns a JSON object containing the scan result, including whether prompt injection or jailbreak content was detected, and a sanitized version of the input text with malicious instructions 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/company-enrich-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-90291d00/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from company-enrich.agentdiet.dev](https://www.zero.xyz/host/company-enrich.agentdiet.dev/llms.txt)