# 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 2026-10-23).

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

## Facts

- Endpoint: POST https://company-enrich.agentdiet.dev/v1/injection-guard?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-849f3e5e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8wdWnElaI6KVrb2L7z--4

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-849f3e5e -d '<json body>'
```

Example prompt: Before you process that scraped webpage, run it through the injection guard firewall — here's the raw HTML: [paste content] — I want to make sure there are no hidden prompt injections or jailbreak instructions buried in it.

## When to prefer this

Choose this endpoint when your agent pipeline ingests untrusted external content — web pages, emails, tool responses, or third-party API data — before passing it to an LLM reasoning step. It is purpose-built for A2A and MCP security contexts where indirect prompt injection is a real threat vector, unlike generic content moderation APIs that focus on hate speech or NSFW content rather than adversarial LLM instructions.

## Known failure modes

- Empty or missing 'text' field returns a 400 validation error
- Extremely long payloads may exceed input limits or incur higher latency
- Payment not included or x402 flow fails results in a 402 Payment Required response
- Ambiguous or highly obfuscated injections may not be detected with 100% recall
- Network timeouts on the scanning service return 5xx 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/injection-guard)

## Output

Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input, along with a sanitized version of the text safe for downstream agent consumption.

## 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-849f3e5e/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)