# 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 injection and jailbreak attacks, returning sanitized text.

## Facts

- Endpoint: GET https://company-enrich.agentdiet.dev/v1/mcp-injection-firewall?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-50de4fe7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kbdcB13mMqdFc0SxFqrJ9

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-50de4fe7
```

Example prompt: Before you process that scraped webpage content, can you run it through the prompt injection firewall to check for any hidden jailbreak instructions and give me the sanitized version?

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests untrusted external content — web scrapes, user emails, third-party MCP tool responses, or A2A payloads — and you need a real-time, per-call firewall check before that content reaches your LLM context. Prefer this over general content moderation tools when the threat model is specifically indirect prompt injection and jailbreak attacks targeting AI agents, rather than hate speech or spam detection.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely long text inputs may be rejected or truncated
- Ambiguous or obfuscated injections using encoding tricks may not be detected
- Payment required (HTTP 402) if x402 micropayment header is missing or invalid
- False positives on legitimate text that resembles injection patterns

## 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/mcp-injection-firewall)

## Output

Returns an object containing the sanitized version of the input text with hidden prompt injections and jailbreak payloads removed or flagged, along with detection metadata indicating whether threats were found.

## 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-50de4fe7/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)