# A2A Indirect Prompt-Injection & Jailbreak Firewall

> A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from json-repair.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://json-repair.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: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-0ec523c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LFzuozexEt1IDp8cXvRF2

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 json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-0ec523c1
```

Example prompt: Before you process this webpage I just scraped, can you run it through the prompt-injection firewall to check for any hidden adversarial instructions or jailbreak attempts embedded in the text?

## When to prefer this

Choose this endpoint when your AI agent needs to process untrusted external content — scraped web pages, incoming emails, third-party API responses, or MCP/A2A tool outputs — before acting on them. It is especially valuable in multi-agent pipelines where one agent's output feeds into another, creating indirect injection attack surfaces. Prefer this over manual filtering when you need automated, real-time scanning integrated into an agent workflow with micropayment support via x402.

## Known failure modes

- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may be truncated or rejected
- Sophisticated obfuscated injections may evade detection
- Non-text binary content may produce unexpected results
- Payment failure (HTTP 402) if x402 micropayment is not properly handled

## 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://json-repair.agentdiet.dev/v1/indirect-injection-guard)

## Output

Returns a response object indicating whether prompt injection or jailbreak content was detected in the input, along with sanitized text with adversarial instructions removed or flagged, allowing the agent to safely consume the cleaned content

## 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/json-repair-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-0ec523c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)