# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from domain-osint.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 output.

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/indirect-injection-guard?utm_source=zero.xyz
- Price: $0.005/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-88f207d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9fRsZbNlWSSXtw4wufH2-

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 domain-osint-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-88f207d8
```

Example prompt: Before you process this email body I just fetched, scan it for hidden prompt injections or jailbreak attempts and give me the sanitized version: [paste raw email text here].

## When to prefer this

Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, inbound emails, third-party tool responses, or A2A payloads — and you need to detect and neutralize hidden prompt injection or jailbreak attempts before passing that content to an LLM. Prefer this over generic content moderation APIs when the specific threat model is adversarial LLM manipulation rather than hate speech or NSFW content.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely long inputs may be truncated or rejected
- Obfuscated or encoded injections may evade detection
- Ambiguous borderline content may produce false positives or false negatives
- Service unavailability returns HTTP 402/5xx with no sanitized output

## 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://domain-osint.agentdiet.dev/v1/indirect-injection-guard)

## Output

Returns a structured object containing the scanned result, including whether a prompt injection or jailbreak payload was detected and a sanitized version of the input text with any 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/domain-osint-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-88f207d8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)