# broker-injection-firewall

> broker-injection-firewall is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.005/call, status unknown (last checked 2026-10-20).

Scans untrusted text (web pages, emails, MCP responses, A2A payloads) for hidden prompt injections and jailbreak attempts, returning sanitized content.

## Facts

- Endpoint: GET https://x402broker.com/v1/injection-firewall?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/broker-injection-firewall-cdd88473
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AmUgqmgI7Dw5LHf0uyzvX

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 broker-injection-firewall-cdd88473
```

Example prompt: Before you process this scraped web page, run it through the injection firewall to check for any hidden prompt injections or jailbreak instructions — here's the raw text: [paste content].

## When to prefer this

Choose this endpoint when your AI agent needs to safely process untrusted external content — such as scraped web pages, inbound emails, third-party API responses, or A2A/MCP payloads — before passing them into an LLM or agentic pipeline. It is specifically designed for indirect prompt injection and jailbreak detection in agentic workflows, making it ideal as a security layer in multi-agent orchestration systems.

## Known failure modes

- Missing required 'text' query parameter returns an error
- Extremely long input text may exceed processing limits
- Novel or sophisticated injection techniques may evade detection
- Non-text binary input formats are not supported
- Network timeout for very large payloads

## 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://x402broker.com/v1/injection-firewall)

## Output

Returns sanitized text with hidden prompt injections removed or flagged, along with detection results indicating whether adversarial content was found in the input.

## 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/broker-injection-firewall-cdd88473/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)